Sunday, June 2, 2019

Understanding hostility in online political discussions: Individuals who are hostile online are equally likely to be hostile offline, motivated by status and seeking to challenge existing political hierarchies

Why so angry? Understanding hostility in online political discussions. Alexander Bor, Michael Bang Petersen. Behavior and Evolution Society 31st annual meeting. Boston 2019. http://tiny.cc/aa1w6y

Abstract: Across Western democracies, online discussions about politics are considered uncivil, aggressive and hostile. Previous evolutionary research has explained this online political hostility as the result of the evolutionarily novel psychophysics of online environments: Lack of face-to-face interaction etc. down-regulate empathy and prompt hostility as a result of lack of emotion-regulation. On this explanation, online political hostility thus reflects an evolutionary mismatch. In contrast, we integrate (i) classical work on the adaptive functions of aggression and (ii) recent evidence on social media behavior to propose that online political hostility is deliberately employed as an instrumental strategy to further particular political agendas. We investigate this using a large representative sample of US citizens (N = 1500). Against the mismatch account, we find that individuals who are hostile online are equally likely to be hostile offline. Consistent with adaptive accounts of aggression, these individuals are motivated by status and seek to challenge existing political hierarchies. To this end, they invest more in online (vs. offline) political discussions as these discussions offer greater benefits (e.g., more interactions and greater reach) at lower costs. Thus, the hostility of online political discussions reflects a strategic investment in online discussions by aggressive prone individuals rather than an evolutionary mismatch.

Why do (some) women wear chokers? Wearing chokers is a function of short-term mating orientation and both male and female observers see them as such

Why do (some) women wear chokers? Laith Al-Shawaf, Heather Williquette. Human Behavior and Evolution Society 31st annual meeting. Boston 2019. http://tiny.cc/aa1w6y

Abstract: In a series of three studies, we generated and tested seven distinct hypotheses about why women wear choker necklaces and what they signify. Study 1 (n=102) showed that interest in wearing chokers and frequency of wearing chokers were both predicted by women’s sociosexuality, a stable individual difference variable that indexes a person’s dispositional orientation toward short-term mating. Study 2 (n=104) showed that male observers correctly use women’s chokers as a cue to their sociosexuality. Study 3 (n=100) showed that female observers also correctly use women’s chokers as a cue to their short-term mating orientation. These studies find clear support for the hypothesis that wearing chokers is a function of short-term mating orientation and no evidence for the other six hypotheses. These findings suggest two key conclusions: a) choker necklaces appear to be valid cues of sociosexual orientation and b) both male and female observers use them as such.

Alone Together: Important gender imbalances exist in what partners do when together; men are much more likely to watch TV and enjoy leisure while women do domestic chores

Alone Together: Gender Inequalities in Couple Time. Giacomo Vagni. Social Indicators Research, Jun 1 2019. https://link.springer.com/article/10.1007/s11205-019-02135-7

Abstract: An important body of research has used time diaries to assess the transformation of gender relationships at home. However, little is known about how partners perceive time shared together. While the household division of labor still remains heavily gendered, it can be expected that what partners do, even when they are together, is also gendered. The aim of this paper is to address the question of the discrepancy (or mismatch) in couples’ reporting of time together as well as the potential discrepancy in the activities engaged in during shared time. Using the 2015 UK Time Use Survey, I show that there is no gender difference in how partners report being together; however, important gender imbalances exist in what partners do when together. In particular, I find that, when together with their partner, men are much more likely to watch TV and enjoy leisure while women do domestic chores. I conclude by discussing different concepts of time together and the usefulness of couple-level diary data for studying gender relationships at home.

Keywords: Time use Gender Families Dyadic data


Saturday, June 1, 2019

Pornography & aggression, & sexual & relationship dissatisfaction: Studies reveal methodological bias in favor of findings for effects that disappear when better methodologies are employed

Fisher, W. (2019). 004 How Science Studies Pornography Impact and What Science Can, and Cannot, Tell Us. The Journal of Sexual Medicine, 16(6), S2. doi:10.1016/j.jsxm.2019.03.461

Introduction:Sexuality clinicians have been concerned about the impact of pornography on sexual behavior at least since Dr. Ivan Bloch’s declaration, in 1902, that “There is no sexual aberration, no perverse act, however frightful,that is not photographically represented today.” Historically, the US, Britain,and Canada have funded national commissions to investigate the presumed negative effects of pornography, and in very recent years, the US Republican party platform and the US states of Florida and Utah have declared that pornography represents a public health crisis. More recently still, the Canadian parliament launched an inquiry into the health effects of online pornography.

Objective:There is a widely accepted social, scientific, and clinical narrative to the effect that pornography is a pervasive cause of sexual aggression against women, relationship devaluation and deterioration, and cause of sexual dysfunction. This presentation provides an overview of four decades of scientific research on the effects of pornography with a view towards soberly assessing what science can, and cannot, tell us about the effects of pornography on sexual aggression, relationship breakdown, and sexual dysfunction.

Methods:The methodological approaches and findings of classic studies inthe areas of pornography and sexual aggression, pornography and sexual and relationship satisfaction, and pornography-induced sexual dysfunction are reviewed and critiqued.

Results:Careful methodological review of laboratory experimentation concerning pornography and aggression reveals staggering methodological bias in favor of findings for effects of pornography on sexual aggression that disappear when appropriate methodologies are employed. Similarly, findings for effects of pornography on sexual and relationship dissatisfaction appear tohave been exaggerated in close-ended research that focuses solely on assessing harms and are not replicated in open-ended participant-informed research approaches. Findings for pornography-induced sexual dysfunction are ambiguous and may be interpreted to mean that individuals are receiving access to idiosyncratically arousing content in pornography that is not otherwise available to them in setting in which their sexual function is suboptimal.

Conclusions:This overview of research calls attention to the need for scientific skepticism in evaluating widely shared but scientifically questionable conclusions concerning the supposed negative effects of pornography. Attention to methodological bias, failures to replicate, and recognition of conflicting findings suggest that the science does not support the conclusions with any degree of consistency. At the same time, we do see patients clinically who have significant problems with their or their partner’s use of pornography, and careful, clinically relevant science on the actual role of pornography in these presentations and effective treatment approaches that focus appropriately on causal factors remains to be accomplished.

Biological Bases of Beauty Revisited: The Effect of Symmetry, Averageness, and Sexual Dimorphism on Female Facial Attractiveness Seems Smaller Than We Thought

Jones, A.L.; Jaeger, B. Biological Bases of Beauty Revisited: The Effect of Symmetry, Averageness, and Sexual Dimorphism on Female Facial Attractiveness. Symmetry 2019, 11, 279. https://www.mdpi.com/2073-8994/11/2/279

Abstract: The factors influencing human female facial attractiveness—symmetry, averageness, and sexual dimorphism—have been extensively studied. However, recent studies, using improved methodologies, have called into question their evolutionary utility and links with life history. The current studies use a range of approaches to quantify how important these factors actually are in perceiving attractiveness, through the use of novel statistical analyses and by addressing methodological weaknesses in the literature. Study One examines how manipulations of symmetry, averageness, femininity, and masculinity affect attractiveness using a two-alternative forced choice task, finding that increased masculinity and also femininity decrease attractiveness, compared to unmanipulated faces. Symmetry and averageness yielded a small and large effect, respectively. Study Two utilises a naturalistic ratings paradigm, finding similar effects of averageness and masculinity as Study One but no effects of symmetry and femininity on attractiveness. Study Three applies geometric face measurements of the factors and a random forest machine learning algorithm to predict perceived attractiveness, finding that shape averageness, dimorphism, and skin texture symmetry are useful features capable of relatively accurate predictions, while shape symmetry is uninformative. However, the factors do not explain as much variance in attractiveness as the literature suggests. The implications for future research on attractiveness are discussed.

Keywords: faces; attractiveness; symmetry; machine learning; averageness; dimorphism

MSM: Relative to a full battery condition, participants were more likely to agree to a hookup in the lowest battery condition; those men also endorsed a greater propensity for sensation seeking

Smartphone Battery Levels and Sexual Decision-Making Among Men Who Have Sex with Men. Alex Lopes, Kaylee Skoda, Cory L. Pedersen. Sexuality & Culture, June 1 2019. https://link.springer.com/article/10.1007/s12119-019-09620-8

Abstract: Smartphone-dating and hook-up apps are undeniable factors in the modern landscape of sexuality. In particular, gay and bisexual men have bridged social and societal barriers for connection by using these apps. Despite advantages afforded by such technological advancements, when individuals are faced with a low phone battery, a sense of urgency may be experienced, which can increase risk-taking behaviours to accommodate an impending phone “death”. The purpose of this study was to determine whether a draining smartphone battery would facilitate a greater likelihood of agreeing to a hookup encounter. Participants were randomly assigned to one of three battery life condition groups (5%, 20%, 100%) and were asked how likely they were to agree to a hookup with a simulated potential sexual partner. We discovered that, relative to a full battery condition, participants were more likely to agree to a hookup in the lowest battery condition. Additionally, men who reported a greater likelihood of agreeing to a hookup also endorsed a greater propensity for sensation seeking, regardless of the battery condition. These findings have practical implications for educating smartphone users who utilize dating and hookup apps about how scarcity decision-making and sensation-seeking can impact the ability to practice safe sexual behaviours.

Keywords: Hookups Dating applications MSM Decision-making Smartphones

There are studies in humans and animals revealing that lack of adequate sleep may facilitate sexual arousal, including objectively measured erections

Costa, R. M. (2019). Sleep and Sexual Arousal: A Complex Relation. The Journal of Sexual Medicine, 16(6), 946. doi:10.1016/j.jsxm.2019.03.267

I congratulate Smith and colleagues for their study on the relations of sexual function and sleep quality in older people,1a topic that deserves great attention. Their findings in a large representative English sample are extremely interesting, but also intriguing. Compared with men with high sleep quality, men with moderate sleep quality had greater odds of having erectile difficulties, but men with low sleep quality did not. Moreover, compared with men who sleep 6e8hours, men who sleep>8 hours had greater odds of having difficulties attaining orgasm, but men who sleep<6 hours did not.1Ifwe think that longer and better sleep favors sexual function, as many studies suggest, these are intriguing findings. Smith and colleagues note that the “results indicate that the relationship between sleep problems and sexual dysfunction is not as simplistic as previously suggested (poorer qualitysleep = greater dysfunction)” (p. 431), especially when several confounds are controlled.1

In this letter, I call the attention to an often overlooked phenomenon in the research on the relations between sleep and sexual function. There are studies in humans and animals revealing that lack of adequate sleep may facilitate sexual arousal, including objectively measured erections. After sleep deprivation, men diagnosed with psychogenic erectile dysfunction improved their erections in response to erotica,2 and for both sexes, poorer subjective sleep quality over the past month correlated with self-reports of greater unstimulated sexual arousal, that is, arousal in the absence of external stimuli.3 This occurred especially among those with higher testosterone levels.3 Among men, awakenings during both rapid eye movement (REM) and non-REM sleep increased visual attention to pictures of women, as assessed by eye-tracker, but the non-REM sleep awakening also disturbed REM sleep,4 which makes likely that it is the specific inhibition of REM sleep that has enhancing effects on sexual arousal. This is confirmed by research showing that REM sleep deprivation stimulates spontaneous erections and ejaculations in rats.5 The potential of REM sleep deprivation for increasing sexual arousal might be due to increased dopaminergic transmission, and it may also occur in women.3 Shortage of REM sleep is a likely consequence of many sleep disturbances.

Plausibly, in many cases, this effect may be offset by tiredness, difficulties interacting with the partner, psychopathology that develops due to lack of appropriate sleep, and perhaps by lower testosterone levels,3 among other factors. However, its presence might account for the complexity of the relationship between sleep and sexual function, as noted by Smith and colleagues.1

The False Enforcement of Unpopular Norms: The authors argue that people enforce unpopular norms to show that they have complied out of genuine conviction and not because of social pressure

The False Enforcement of Unpopular Norms. Robb Willer, Ko Kuwabara, Michael W. Macy. AJS Volume 115 Number 2 (September 2009): 451–90. https://pdfs.semanticscholar.org/1293/ecb55a2c5194fd1c16532c2c92599c6931fb.pdf

Abstract: Prevailing theory assumes that people enforce norms in order to pressure others to act in ways that they approve. Yet there are numerous examples of “unpopular norms” in which people compel each other to do things that they privately disapprove. While peer sanctioning suggests a ready explanation for why people conform to unpopular norms, it is harder to understand why they would enforce a norm they privately oppose. The authors argue that people enforce unpopular norms to show that they have complied out of genuine conviction and not because of social pressure. They use laboratory experiments to demonstrate this “false enforcement” in the context of a wine tasting and an academic text evaluation. Both studies find that participants who conformed to a norm due to social pressure then falsely enforced the norm by publicly criticizing a lone deviant. A third study shows that enforcement of a norm effectively signals the enforcer’s genuine support for the norm. These results demonstrate the potential for a vicious cycle in which perceived pressures to conform to and falsely enforce an unpopular norm reinforce one another.

The adaptive problems humans faced with respect to plants have left their mark on the human mind

How Plants Shape the Mind. Annie E. Wertz. Trends in Cognitive Sciences, June 1 2019, https://doi.org/10.1016/j.tics.2019.04.009

Abstract: Plants are easy to overlook in modern environments, but were a fundamental part of human life over evolutionary time. Recent work with infants suggests that the adaptive problems humans faced with respect to plants have left their mark on the human mind.

‘Everybody’s doing it’: on the persistence of bad social norms

‘Everybody’s doing it’: on the persistence of bad social norms. David Smerdon, Theo Offerman, Uri Gneezy. Experimental Economics, May 31 2019, https://link.springer.com/article/10.1007/s10683-019-09616-z

Abstract: We investigate how information about the preferences of others affects the persistence of ‘bad’ social norms. One view is that bad norms thrive even when people are informed of the preferences of others, since the bad norm is an equilibrium of a coordination game. The other view is based on pluralistic ignorance, in which uncertainty about others’ preferences is crucial. In an experiment, we find clear support for the pluralistic ignorance perspective. In addition, the strength of social interactions is important for a bad norm to persist. These findings help in understanding the causes of such bad norms, and in designing interventions to change them.

Keywords: Social norms Pluralistic ignorance Social interactions Equilibrium selection Conformity

Friday, May 31, 2019

fRMI & romantically disillusioning events: Compared to regret‐inducing events, disillusioning events showed greater activation in areas thought pertinent to detail processing and decision making (occipital fusiform & lingual gyrus)

Functional magnetic resonance imaging activation in response to prompts of romantically disillusioning events. Sylvia Niehuis et al. Personal Relationships, May 30 2019. https://doi.org/10.1111/pere.12272

Abstract: To differentiate romantic disillusionment from similar constructs of dissatisfaction and regret, functional Magnetic Resonance Imaging (fMRI) data obtained when romantically involved individuals (N = 39) were reminded of relationship events representing these emotions were analyzed. Whole‐brain activations suggested disillusionment‐linked processes not observed for dissatisfaction or regret. Compared to dissatisfying events, disillusioning ones showed greater activity in regions pertaining to evaluation, reflection, and reconciling conflicting information (e.g., anterior cingulate cortex). No regions showed significantly more activation for dissatisfying than disillusioning events. Compared to regret‐inducing events, disillusioning events showed greater activation in areas thought pertinent to detail processing and decision making (occipital fusiform and lingual gyrus). Regret‐inducing events activated regions suggesting the planning and thoughts of how one could have acted differently (e.g., prefrontal cortex).

The Relationship between Marijuana Use Prior to Sex and Sexual Function in Women: Marijuana appears to improve satisfaction with orgasm

Lynn BK, López JD, Miller C, et al. The Relationship between Marijuana Use Prior to Sex and Sexual Function in Women. Sex Med 2019;7:192-197. https://doi.org/10.1016/j.esxm.2019.01.003

Abstract
INTRODUCTION: Scientific research on the effects of marijuana on sexual functioning in women, including libido, arousal, orgasm, and satisfaction, is limited.

AIM: To evaluate women's perceptions of the effect of marijuana use before sexual activity.

METHODS: A cross-sectional design, from March 2016-February 2017, within a single, academic, obstetrics and gynecology practice, was performed. Patients were given a questionnaire at their visit and asked to complete it anonymously and place it in a locked box after their visit.

MAIN OUTCOME MEASURES: The primary outcome was satisfaction in the sexual domains of drive, orgasm, lubrication, dyspareunia, and overall sexual experience. The secondary outcome was the effect of the frequency of marijuana use on satisfaction.

RESULTS: Of the 373 participants, 34.0% (n = 127) reported having used marijuana before sexual activity. Most women reported increases in sex drive, improvement in orgasm, decrease in pain, but no change in lubrication. After adjusting for race, women who reported marijuana use before sexual activity had 2.13 higher odds of reporting satisfactory orgasms (adjusted odds ratio = 2.13; 95% CI = 1.05, 4.35) than women who reported no marijuana use. After adjusting for race and age, women with frequent marijuana use, regardless of use before sex or not, had 2.10 times higher odds of reporting satisfactory orgasms than those with infrequent marijuana use (adjusted odds ratio = 2.10; 95% CI = 1.01-4.44).

CONCLUSION: Marijuana appears to improve satisfaction with orgasm. A better understanding of the role of the endocannabinoid system in women is important, because there is a paucity of literature, and it could help lead to development of treatments for female sexual dysfunction.

KEYWORDS: Epidemiology; Female Sexual Response; Health Behavior and Attitudes; Women’s Sexuality

Introduction

Over the last decade, marijuana use and the legalization of marijuana, medically and recreationally, has continued to increase in the United States.1 The internet is rife with claims of the beneficial effects of marijuana on several aspects of sexual function including libido, arousal, and orgasm. However, our scientific research on the effects of marijuana on sexual functioning is limited. Recently Palamar et al2 evaluated self-reported sexual effects of marijuana, ecstasy, and alcohol use in a small cohort of men and women aged 18–25. They found that the majority of marijuana users reported an increase in sexual enjoyment and orgasm intensity, as well as either an increase or no change in desire.2

Endocannabinoids, which are structurally similar to marijuana, are known to help regulate sexual function.3 The cannabinoid receptor, discovered in the 1990s, has been mapped to several areas of the brain that play a role in sexual function.3 Cannabinoids and endocannabinoids interact with the hormones and neurotransmitters that affect sexual behavior. Although these interactions have not been clearly illuminated, some studies in rodents have helped to clarify the relationship between cannabinoids and the hormones and neurotransmitters that affect sexual behavior.4 Although there is less data on human subjects, some studies have measured patient’s perceptions of the effects of marijuana on sexual function. Studies have reported an increase in desire and improvement in the quality of orgasm.5 Most recently, Klein et al6 evaluated the correlation between serum levels of 2 endogenous endocannabinoids and found a significant negative correlation between endocannabinoids and both physiological and subjective arousal in women. Sumnall et al7 reported that drugs such as cannabis and ecstasy were more frequently taken to improve the sexual experience than was alcohol.

The primary aim of this study was to determine how women perceive the sexual experience, specifically overall sexual satisfaction, sex drive, orgasm, dyspareunia, and lubrication, when using marijuana before sex. The magnitude of the change was also evaluated. The secondary aim sought to understand the effect of the frequency of marijuana use, regardless of marijuana use before sex, on satisfaction across the different sexual function domains.

GDPR After One Year: Costs and Unintended Consequences. By Alec Stapp

GDPR After One Year: Costs and Unintended Consequences. Alec Stapp. May 24 2019. https://truthonthemarket.com/2019/05/24/gdpr-after-one-year-costs-and-unintended-consequences/

Excerpts (full links in the original article):

GDPR cases and fines
Here is the latest data on cases and fines released by the European Data Protection Board (https://edpb.europa.eu/news/news/2019/1-year-gdpr-taking-stock_en):

    €55,955,871 in fines
        €50 million of which was a single fine on Google
    281,088 total cases
        144,376 complaints
        89,271 data breach notifications
        47,441 other
    37.0% ongoing
    62.9% closed
    0.1% appealed

Compliance costs are astronomical
    Prior to GDPR going into effect, it was estimated that total GDPR compliance costs for US firms with more than 500 employees “could reach $150 billion.” (Fortune)
    Another estimate from the same time said 75,000 Data Protection Officers would need to be hired for compliance. (IAPP)
    As of March 20, 2019, 1,129 US news sites are still unavailable in the EU due to GDPR. (Joseph O’Connor)
    Microsoft had 1,600 engineers working on compliance. (Microsoft)
    During a Senate hearing, Keith Enright, Google’s chief privacy officer, estimated that the company spent “hundreds of years of human time” to comply with the new privacy rules. (Quartz)
        However, French authorities ultimately decided Google’s compliance efforts were insufficient: “France fines Google nearly $57 million for first major violation of new European privacy regime” (The Washington Post)
    “About 220,000 name tags will be removed in Vienna by the end of [2018], the city’s housing authority said. Officials fear that they could otherwise be fined up to $23 million, or about $1,150 per name.” (The Washington Post)
        Other reports claim that GDPR does not require removing name tags from buildings, but it is telling that ambiguity in the law caused the Vienna housing authority to believe it did (derStandard)

Unseen costs of foregone investment & research
    Startups: One study estimated that venture capital invested in EU startups fell by as much as 50 percent due to GDPR implementation. (NBER)
    Mergers and acquisitions: “55% of respondents said they had worked on deals that fell apart because of concerns about a target company’s data protection policies and compliance with GDPR” (WSJ)
    Scientific research: “[B]iomedical researchers fear that the EU’s new General Data Protection Regulation (GDPR) will make it harder to share information across borders or outside their original research context.” (Politico)

GDPR has been the death knell for small and medium-sized businesses

SMBs have left the EU market in droves (or shut down entirely). Here is a partial list:

    Brent Ozar, IT consulting services
    CoinTouch, peer-to-peer cryptocurrency exchange
    Drawbridge, cross-device identity service
    FamilyTreeDNA, free and public genetic tools
        Mitosearch
        Ysearch
    Gravity Interactive, video game developer
        Ragnarok Online
        Dragon Saga
    Hitman: Absolution, video game developed by IO Interactive
    Klout, social reputation service by Lithium
    Loadout, video game developed by Edge of Reality
    Monal, XMPP chat app
    MotoSport, powersports retailer
    Parity, know-your-customer service for initial coin offerings (ICOs)
    Payver, dashcam app
    Pottery Barn, housewares retailer
    Seznam, social network for students
    Steel Root, cybersecurity and IT services
    StreetLend, tool sharing platform for neighbors
    Super Monday Night Combat (SMNC), video game developed by Uber Entertainment
    Tunngle, video game VPN
    Unroll.me, inbox management app
    Verve, mobile programmatic advertising
    Williams-Sonoma, housewares retailer

Thursday, May 30, 2019

The majority (94.5%) of women indicated having masturbated at least once in their life; reported masturbating 2 or 3 times a week (26.8%) or once (26.3%); it is not “a partner substitute”, but rather is a stress coping & relaxation strategy

Masturbatory Behavior in a Population Sample of German Women. Andrea Burri, Ana Carvalheira. The Journal of Sexual Medicine, May 30 2019. https://doi.org/10.1016/j.jsxm.2019.04.015

Abstract
Background: Human masturbation is and has been a very heatedly and controversially discussed topic in human sexuality. Studies investigating aspects of human masturbatory behavior and female sexual pleasure remain scarce. This lack of knowledge opens the door to further controversies and misconceptions.

Aim: To conduct an explorative study on female masturbatory behavior to gain more insight into this nonreproductive sexual behavior and provide an empiric basis for future research.

Methods: A total of 425 German women (mean age 26.6 years), 61.4% of whom were in a committed relationship, completed a comprehensive 76-item online survey consisting of study-specific, self-constructed questions and validated and standardized questionnaires.

Main Outcome Measure: Correlation and comparative analyses were performed. Results are presented numerically as means and percentages.

Results: The majority (94.5%) of women indicated having masturbated at least once in their life, with a mean age at first masturbation of 14 years. 85.9% of women described masturbation as “genital self-stimulation until reaching orgasm.” The majority of women reported masturbating 2 or 3 times a week (26.8%) or once a week (26.3%). Factors independently associated with masturbation frequency were relationship status, orgasm frequency, openness to new experience, and body acceptance. Almost all women (91.5%) reported masturbating also when in a relationship. For the 5.5% of women who had never engaged in autoerotic stimulation, the 2 main reasons were “I hardly every feel sexual desire” and “sex is a partner-only thing.” 7.6% reported never experiencing an orgasm during masturbation, whereas 50.3% indicated that they always reached orgasm during autostimulation. The reasons cited for engaging in masturbation were manifold, ranging from sexual desire to relaxation and stress reduction. The most common fantasy included the partner; however, 20.7% fantasized about being “defenseless,” and 8.7% thought about a “disturbing” scenario that they chose not to elaborate further.

Clinical Implications: For many women, masturbation does not represent “a partner substitute” to seek sexual pleasure, but rather is a stress coping and relaxation strategy.

Strengths & Limitations: This is one of the very first studies to provide more in-depth insight into a variety of aspects related to female masturbation. The representativeness of the data is limited to this particular sample of German women.

Conclusion: Our findings highlight the huge diversity in terms of masturbation frequency, motivations, styles, and preferences that can be observed in this particular population sample of German women.

Valkyries: Was Gender Equality High in the Scandinavian Periphery since Viking Times? Evidence from Enamel Hypoplasia and Height Ratios

Valkyries: Was Gender Equality High in the Scandinavian Periphery since Viking Times? Evidence from Enamel Hypoplasia and Height Ratios. Laura Maravall Buckwalter. Economics & Human Biology, May 30 2019. https://doi.org/10.1016/j.ehb.2019.05.007

Highlights
•    Frequency of linear enamel hypoplasia is used as an indicator of gender equality.
•    This indicator allows us to measure the health of men and women over two millennia.
•    Scandinavian women had better relative values already during the Viking era.
•    Medieval Scandinavian women were also healthier than contemporary women elsewhere.

Abstract: Scandinavian countries currently have very high values of female autonomy. Was this already the case in Viking Times? In this study, we trace the roots of gender equality in the Scandinavian periphery over the past two millennia. We evaluate and recommend a new measure of early gender equality: relative enamel hypoplasia values of males and females. This new indicator allows us to trace relative health and nutritional equality, using archaeological evidence. We find that Scandinavian women in the rural periphery already had relatively good health and nutritional values during the Viking era and the medieval period thereafter. The corresponding value is 0.8 equality advantage for Scandinavian women, whereas in the rest of Europe most values fall in a band around 1.2 ratio units. This suggests that the currently high gender equality had a precedence during the Middle Ages.

Self‐employed males are more likely to be attractive & more attractive self‐employed males have higher incomes; differences in income from IQ declined as attractiveness increases; no differences for females

In the eye of the beholder? The returns to beauty and IQ for the self‐employed. Pankaj C. Patel, Marcus T. Wolfe. Strategic Entrepreneurship Journal, May 24 2019. https://doi.org/10.1002/sej.1323

Research summary: Using a two study approach, we examine the relationship between attractiveness and key aspects of self‐employment. In Study 1, in which individuals rated the attractiveness of participants at the beginning of the interview, our results indicate that self‐employed males are more likely to be attractive and that more attractive self‐employed males have higher incomes. In Study 2, our findings indicate that at low levels of attractiveness, higher IQ self‐employed males have higher incomes in 1974; however, differences in income from IQ declined as attractiveness increases. We do not find differences for either outcome for females in either study.

Managerial summary: This research investigates the relationship between attractiveness and self‐employment. The results indicate that self‐employed males are more likely to be considered attractive than their female counterparts, and that attractive self‐employed males have higher incomes than self‐employed males who were not considered attractive. Additionally, our results reveal that IQ is positively associated with income for less attractive self‐employed males, however this relationship decreases in strength as attractiveness increases. Interestingly, our results do not indicate that attractiveness influences either the likelihood of self‐employment, or performance within self‐employment, for females. Our findings highlight the importance that attractiveness can play within the self‐employment process, as well as the relevance of considering the role that social norms regarding gender might have in determining who pursues, and is successful in, self‐employment.

Reworking Trauma through BDSM: Sadomasochistic reenactments of lived trauma, informed by queer-of-color critique, feminist performance studies, and psychoanalysis, may reconfigure such trauma

Reworking Trauma through BDSM. Corie Hammers. Signs, Journal of Women in Culture and Society, Volume 44, Number 2 | Winter 2019. https://www.journals.uchicago.edu/doi/abs/10.1086/699370

Abstract: As part of a much larger ethnographic study of lesbian/queer sex publics, this essay focuses on a particular erotic practice—sadomasochistic reenactments of lived trauma. Informed by queer-of-color critique, feminist performance studies, and psychoanalysis, this essay explores the necessary queer conditions enabling such returns, by which I mean the reenacting through BDSM of one’s own lived trauma in order to reconfigure it. This queerness, as an embodied erotics fed by durational—as opposed to impersonal and anonymous—ties, rides on the relational. That is, it is our fleshy entanglements and shared dependencies that enable these returns, returns that refuse and reconfigure lived trauma. The site of lesbian/queer sex publics thus offers critical reworkings, somatically generating as it does alternatively embodied futures.

Visual Attention to Sexual Stimuli in Mostly Heterosexuals: Differences between mostly and exclusively heterosexual profiles in men depends on a pattern of response that was found to be mediated by reduced disgust

Visual Attention to Sexual Stimuli in Mostly Heterosexuals. James S. Morandini. Archives of Sexual Behavior, May 29 2019. https://link.springer.com/article/10.1007/s10508-019-1419-4

Abstract: Individuals who report mostly heterosexual orientations (i.e., mostly sexually attracted to the opposite sex, but occasionally attracted to the same sex) outnumber all other non-heterosexual individuals combined. The present study examined whether mostly heterosexual men and women view same- and other-sex sexual stimuli differently than exclusively heterosexual men and women. A novel eye-tracking paradigm was used with 162 mostly and exclusively heterosexual men and women. Compared to exclusively heterosexual men, mostly heterosexual men demonstrated greater attention to sexually explicit features (i.e., genital regions and genital contact regions) of solo male and male–male erotic stimuli, while demonstrating equivalent attention to sexually explicit features of solo female and female–female erotic stimuli. Mediation analyses suggested that differences between mostly and exclusively heterosexual profiles in men could be explained by mostly heterosexual men’s increased sexual attraction to solo male erotica, and their increased sexual attraction and reduced disgust to the male–male erotica. No comparable differences in attention were observed between mostly and exclusively heterosexual women—although mostly heterosexual women did demonstrate greater fixation on visual erotica overall—a pattern of response that was found to be mediated by reduced disgust.

Keywords: Mostly heterosexual Sexual orientation Disgust Visual attention Sex differences



There is a tendency to willfully & actively forget details about their own moral transgressions but not about their own morally praiseworthy deeds; when not forgotten, people foster a perception of moral improvement over time

Moral Memories and the Belief in the Good Self. Matthew L. Stanley, Felipe De Brigard. Current Directions in Psychological Science, May 29, 2019. https://doi.org/10.1177/0963721419847990

Abstract: Most people believe they are morally good, and this belief plays an integral role in constructions of personal identity. Yet people commit moral transgressions with surprising frequency in everyday life. In this article, we characterize two mechanisms involving autobiographical memory that are utilized to foster a belief in a morally good self in the present—despite frequent and repeated immoral behavior. First, there is a tendency for people to willfully and actively forget details about their own moral transgressions but not about their own morally praiseworthy deeds. Second, when past moral transgressions are not forgotten, people strategically compare their more recent unethical behaviors with their more distant unethical behaviors to foster a perception of personal moral improvement over time. This, in turn, helps to portray the current self favorably. These two complementary mechanisms help to explain pervasive inconsistencies between people’s personal beliefs about their own moral goodness and the frequency with which they behave immorally.

Keywords: ethics, moral, autobiographical memory, self-enhancement, identity


Sex differences of political interest: At age 15, there is already a gender gap of 20 pct points in the probability of respondents reporting being politically interested; in the following 10 years the gap grows by 10 additional pct points

Tracing the Gender Gap in Political Interest Over the Life Span: A Panel Analysis. Marta Fraile, Irene Sánchez‐Vítores. Political Psychology, May 29 2019. https://doi.org/10.1111/pops.12600

Abstract: Despite recent advances in gender equality in political representation and the availability of resources, this article shows that there is a persistent gender gap in declared political interest over the life cycle. Using evidence from the British Household Panel Survey (BHPS), we track the gender gap through the life span of citizens. At age 15, there is already a substantial gender gap of 20 percentage points in the probability of respondents reporting being politically interested, pointing to gendered socialization processes as the key explanation for such differences. In the following 10 years, as people develop into adults and unravel their political orientations, the extent of the gender gap continues to grow by about 10 additional percentage points. Following these formative years, attitudes crystallize and so does the gender gap, remaining at the same size (around 30 percentage points of difference between women and men) over the life course. These findings suggest that the development of gender roles during early childhood is a crucial phase in the source of the gender gap, deserving further attention from scholars.

Wednesday, May 29, 2019

Some people share knowledge online, often without tangible compensation. Who does this, when, and why? People use behavioral displays to provide observers with useful information about traits in exchange for fitness benefits

The quality of online knowledge sharing signals general intelligence. Christian N.Yoder, Scott A.Reid. Personality and Individual Differences. Volume 148, 1 October 2019, Pages 90-94. https://doi.org/10.1016/j.paid.2019.05.013

Abstract: Some people share knowledge online, often without tangible compensation. Who does this, when, and why? According to costly signaling theory people use behavioral displays to provide observers with useful information about traits or states in exchange for fitness benefits. We tested whether individuals higher in general intelligence, g, provided better quality contributions to an information pool under high than low identifiability, and whether observers could infer signaler g from contribution quality. Using a putative online wiki (N = 98) we found that as individuals' scores on Ravens Progressive Matrices (RPM) increased, participants were judged to have written better quality articles, but only when identifiable and not when anonymous. Further, the effect of RPM scores on inferred intelligence was mediated by article quality, but only when signalers were identifiable. Consistent with costly signaling theory, signalers are extrinsically motivated and observers act as “naive psychometricians.” We discuss the implications for understanding online information pools and altruism.

Sexuality and sexism: Differences in ambivalent sexism across gender and sexual identity

Sexuality and sexism: Differences in ambivalent sexism across gender and sexual identity. Lucy J.Cowie, Lara M.Greaves, Chris G.Sibley. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 85-89. https://doi.org/10.1016/j.paid.2019.05.023

Abstract: Heterosexual intimacy is theorised to play a key role in Ambivalent Sexism, yet gay, lesbian, and bisexual people's levels of Hostile and Benevolent Sexism have not been previously examined. This paper draws upon data from the national probability New Zealand Attitudes and Values Study (N = 18,266) to examine levels of Hostile and Benevolent sexism across gender (men and women) and sexual identity (gay/lesbian, bisexual, and heterosexual individuals). Overall, we found that men compared to women, and heterosexuals compared to lesbian/gay and bisexuals, had significantly higher Hostile and Benevolent Sexism than other groups. The interaction of gender and sexual identity was significant for Benevolent, but not Hostile, Sexism. Gay men had the lowest levels of Benevolent Sexism, with bisexual men scoring between gay and heterosexual men. Heterosexual women were higher in Benevolent Sexism than lesbian and bisexual women. These findings lend support to the notion that heterosexual intimacy is an important driver sustaining Benevolent Sexism.

Gossip and the Reasons Why We and Individuals With “Dark” Personalities Talk About Others: Even dark personalities appear to use gossip to tune their picture of other humans and themselves and not to harm others

Better Than Its Reputation? Gossip and the Reasons Why We and Individuals With “Dark” Personalities Talk About Others. Freda-Marie Hartung*, Constanze Krohn and Marie Pirschtat. Front. Psychol., May 29 2019. https://doi.org/10.3389/fpsyg.2019.01162

Abstract: Gossip is an ubiquitous phenomenon. Hearing information about others serves important social functions such as learning without direct interaction and observation. Despite important social functions gossip has a rather negative reputation. Therefore, the present online study focuses on the reasons why people gossip and how these reasons are related to personality (i.e., dark triad) and situational settings. Six distinct motives were identified that underlie gossip behavior: information validation, information gathering, relationship building, protection, social enjoyment, and negative influence. The most important motive was validating information about the gossip target followed by the motive to acquire new information about the gossip target. The least important motive was harming the gossip target. The motivational pattern was highly similar between private and work context. Interestingly, the importance of motives mainly depends on the gossiper's narcissism both in work and in private settings. The findings suggest that the negative reputation of gossip is not justified. In fact, even “dark” personalities appear to use gossip to tune their picture of other humans and themselves and not to harm others.


Introduction

Eavesdropping in public settings reveals that people devote a substantial part of their conversations to gossip (e.g., Levin and Arluke, 1985; Dunbar et al., 1997). Accordingly, important social functions have been postulated for gossip in science (e.g., Foster, 2004). Despite these important functions, gossip has a rather bad reputation since it is perceived as inherently malicious harming people and society (e.g., Farley, 2011; Hartung and Renner, 2013; Peters and Kashima, 2013). Whether behavior can be judged as good or bad depends, at least in part, on the intention of the individuals engaging in that behavior. Therefore, the present study aims to examine whether the bad reputation of gossip is justified by examining reasons to gossip. In addition, we examine the reasons of individuals scoring high on the dark triad personality traits (i.e., narcissism, Machiavellianism, psychopathy) as they are known to ignore commonly accepted norms and to act selfishly (e.g., O‘Boyle et al., 2012; Muris et al., 2017). More specifically, we investigate whether individuals scoring high on the dark triad personality traits are more ready to use gossip in order to harm others and to serve themselves, thereby, contributing to the negative reputation of gossip.

Gossip refers to the exchange of information about characteristics and behaviors of an absent person (Dunbar, 2004b; Foster, 2004; Peters and Kashima, 2015). From an anthropological perspective, it has been argued that human language primarily evolved to exchange social information in order to deal with complex social situations (Dunbar, 1998, 2004a; Barrett et al., 2002), and that we, therefore, preferentially attend to social information (e.g., Mesoudi et al., 2006). Accordingly, two thirds of adult conversations in public settings involve gossip (e.g., Levin and Arluke, 1985; Dunbar et al., 1997). Experimental evidence is in line with that notion (e.g., Mesoudi et al., 2006). In general, gossip appears to be a widely spread and almost inevitable phenomenon.

As a result, important social functions have been postulated for gossip in anthropological and psychological science (e.g., Suls, 1977; Baumeister et al., 2004; Dunbar, 2004a,b; Foster, 2004; Hartung and Renner, 2013). First, gossip is an efficient means of gathering and disseminating information (Foster, 2004). The exchanged information enables individuals to get a map of their social environment and their position within that social environment (Suls, 1977; Baumeister et al., 2004; Foster, 2004; De Backer et al., 2007; Sommerfeld et al., 2007; Martinescu et al., 2014). Baumeister et al. (2004), for instance, understand gossip as an extension of observational learning. People learn about the complex social and cultural life by hearing about the success and misadventures of others. It appears that we do not learn only about extraordinary experience made by others but also about more trivial things such as dressing style (De Backer et al., 2007). Thus, exchanging information about others enables us to learn without direct interaction and observation.

Secondly, Dunbar (1998, 2004a) and Mesoudi et al. (2006) argues in his social gossip theory of language that human language evolved in order to keep track of complex social networks and to ensure the cohesion in large social groups. More specifically, it has been suggested and empirically shown that, at the dyadic level, sharing gossip is associated with friendship (Grosser et al., 2010; Watson, 2011; Ellwardt et al., 2012b) and even leads to the development of friendships (Ellwardt et al., 2012b; see also Bosson et al., 2006). In addition, it has been suggested that, at the group level, gossip leads to group specific knowledge, norms, and trust, in turn supporting group cohesion and bonding (e.g., Dunbar, 2004b; Foster, 2004; Peters et al., 2017). Thus, sharing information about others is a way to build and maintain relationships and networks.

Thirdly, a growing number of researchers assume that gossip serves as an informal policing device for controlling free riders and social cheats (Dunbar, 2004b; Keltner et al., 2008; Feinberg et al., 2012). Faced with the concern that information about negative behavior runs through the grapevine and may consequently lead to the loss of reputation or even social exclusion, it prevents people from acting against social norms and the good of the group (Piazza and Bering, 2008; Beersma and Van Kleef, 2011; Feinberg et al., 2014; Wu et al., 2016). Thus, gossip keeps people from acting against the good of the group and fosters cooperation.

Finally, it has been suggested that gossip has an entertainment function providing recreational value and considerable stimulation for very little costs (Foster, 2004; Peng et al., 2015). Taken together, research has postulated and empirically shown that the exchange of information about absent third persons serves several important functions in a social environment.

However, despite its important social functions, gossip has a rather negative reputation (Farley, 2011; Hartung and Renner, 2013; Peters and Kashima, 2013). For instance, asking individuals to rate their tendency to gossip, they rate themselves to be less gossipy than an average peer of the same sex, suggesting that gossiping is perceived rather negatively (Hartung and Renner, 2013). Also, frequent gossipers are perceived as less likable and less popular than people gossiping less frequently (Farley, 2011; Ellwardt et al., 2012b). Supporting the bad reputation, some researchers suggest that gossip is a covert form of aggression (i.e., non-confrontational) especially used by women (e.g., McAndrew, 2014). Thus, the positive “social function view” is not mirrored in the reputation of gossip and gossipers.

Thus, evaluating gossip as a rather positive or negative behavior is not as easy as it may appear at first sight. Focusing on the social functions, that can be understood as not necessarily intended social consequences of gossip behavior, research clearly paints a positive picture of gossip. However, one might also evaluate gossip with respect to other dimensions such as positivity or negativity of the transmitted information or the intention of the gossiper (Eckhaus and Ben-Hador, 2018). Focusing on one of these dimensions of gossip might change the evaluation and emphasize the negative reputation of gossip. And indeed, research has shown that people give consideration to the fact that gossip differs and also gossipers differ from each other (Farley, 2011; Beersma and Van Kleef, 2012; Peters and Kashima, 2015). Empirical findings have shown that people take the presumed motivation of a gossiper into account when judging the morality of the respective gossiper, for instance (Beersma and Van Kleef, 2012). Thus, even though people disapprove of gossip in general, they consider the reasons people might have to gossip.

Hence, to evaluate whether a certain behavior is good or bad, the underlying reasons or the intentions should be taken into account. Curiously, very few research exists on simply asking people about the reasons why they gossip (Beersma and Van Kleef, 2012). In their study, Beersma and Van Kleef (2012) distinguished four different reasons to gossip, namely information gathering and validation, social enjoyment, negative influence, and group protection. This means, people instigate gossip to gather information and compare their ideas about others, to enjoy themselves, to spread negative information about a third person, and/or to protect the person they are talking with. The study provides initial evidence that people primarily gossip to gain information about other people and not to harm others (Beersma and Van Kleef, 2012). Thus, when focusing on gossipers' intentions, a rather positive picture of gossip is painted.

Another way to explore whether the reputation of gossip is justified is to examine the gossip reasons of individuals scoring high on narcissism, Machiavellianism and psychopathy. These three traits are summarized under the umbrella term dark triad and gained considerable attention in the past years (Jones and Paulhus, 2011; O‘Boyle et al., 2012; Furnham et al., 2013; Jones and Figueredo, 2013; Lee et al., 2013; Book et al., 2015; Muris et al., 2017). It has been shown that the three traits are overlapping, but are nevertheless distinct concepts (e.g., Furnham et al., 2013; Lee et al., 2013; but see also Muris et al., 2017). As the common core the tendency to deceive, manipulate, and exploit others for one's own benefit has been suggested (Lee et al., 2013; see also Jones and Figueredo, 2013). Conversations about absent third parties appear to be an apparent method to do exactly that. Thus, if individuals with “dark” personalities regularly use gossip to spread negative information and harm others that would surely contribute to the negative reputation of gossip. However, if even individuals with “dark” personalities rarely use gossip with the intention to harm others, the positive aspects of gossip would be underlined.

Research has shown that the dark triad personality traits are related to a variety of negative social and non-social outcomes (e.g., Baughman et al., 2012; O‘Boyle et al., 2012; Wisse and Sleebos, 2016; Muris et al., 2017; Deutchman and Sullivan, 2018). For instance, individuals scoring higher on the dark triad traits show a higher tendency to tell lies and to cheat than individuals scoring lower on these traits (Nathanson et al., 2006; Williams et al., 2010; Baughman et al., 2014; Jonason et al., 2014; Roeser et al., 2016; Muris et al., 2017). In addition, individuals scoring higher on the dark triad value themselves over the others (Jonason et al., 2015), are less concerned with others' welfare (Djeriouat and Trémolière, 2014; Jonason et al., 2015; Noser et al., 2015) and with fairness (Jonason et al., 2015). Taken together, these studies and reviews illustrate that individuals scoring higher on the dark triad personality traits are willing to dismiss commonly accepted social norms and harm others for their own good.

Therefore, it is plausible to assume that individuals scoring higher on the dark traits are also more ready to use gossip for their own sake without caring about potentially negative effects for others. More specifically, it is easy to imagine that individuals scoring higher on the dark triad readily use gossip to negatively influence another person's reputation (i.e., potential competitor or rival) to push through self-beneficial agendas. In line with that notion, women scoring high on the dark triad traits use gossip—among other strategies—to derogate competitors (Carter et al., 2015). Additionally, as people with dark personalities are not concerned with others' welfare, they probably use gossip less often to protect other individuals or their group from harm (but see Lyons and Hughes, 2015). In a similar vein, the dark side of personality probably has a high impact on gossip motives that serve individual purposes. For instance, people scoring high on the dark triad traits report to have a strong desire for power, control, and dominance (e.g., Jonason et al., 2010; Lee et al., 2013; Semenyna and Honey, 2015). Gaining social information and knowledge about people surrounding us provides us with a sense of control and advantage over others (e.g., Swann et al., 1981; Fiske, 2004). Therefore, simply gathering and validating social information might be another salient reason for dark personalities to gossip.

Taken together, the present online study focuses on the reasons why people engage in conversations about absent third parties. The aims of the present study are 2-fold. First, we aim to examine the reasons for people to engage in gossip, replicating the study of Beersma and Van Kleef (2012). To do so, we translated the Motives to Gossip Questionnaire into German. In addition, we extended the questionnaire by widening the number of possible reasons including gossiping in order to foster relationship building and to gather social information. Second, to examine whether the bad reputation of gossip is justified or not, we explore the role of the “dark” personality traits in gossip motivation. One might assume that individuals scoring higher on narcissism, Machiavellianism, and psychopathy are more likely unconcerned with moral considerations and driven by selfish reasons when engaging in gossip, consequently, contributing to the negative reputation of gossip. However, we have no specific hypotheses concerning the single dark triad traits.

The Motives to Gossip Questionnaire asks participants to rate their reasons for gossip in a specific situation. In order to explore to what extent gossip motives can be generalized across situations, two different situations were incorporated in the study (i.e., private as well as workplace situations). Based on the work of Mischel (1977), researchers differentiate between strong situations with normative expectations and clear roles that constrain behavior, and weak situations which do not provide normative expectations, and, therefore, allow for more freedom in behavior and the expression of personality. Mischel (1977) argued that behavior in strong situations is based on situational circumstances rather than on the individual's personality. In the workplace, people have to follow rules and adjust their behavior to fulfill or support organizational objectives. Here we can assume rather strong situations. In private situations on the other hand, people are mostly unrestricted and have to comply with fewer norms or rules. Also, it is likely that work and private setting differ on a competitiveness-cooperativeness dimension. A competitive situation might elicit motives that serve the individual more easily and hazards negative consequences for others. Taken together, we assume that the work context reflects a rather strong (i.e., clear normative expectations) and competitive situation; and the private context reflects a rather weak and more cooperative situation. Consequently, we explore whether motives show differential importance between these two situations and whether the dark triad traits show differential relationships to gossip reasons across situations (see also Beersma and Van Kleef, 2012).

Beauty Is Not Always in the Eye of the Beholder: The Role of Vision in the Emergence of Mate Preferences

Scheller, Meike, Francine Matorres, Lucy Tompkins, Anthony C. Little, and Alexandra A. de Sousa. 2019. “Beauty Is Not Always in the Eye of the Beholder: The Role of Vision in the Emergence of Mate Preferences.” PsyArXiv. May 29. doi:10.31234/osf.io/nt3x

Abstract: Cross-cultural research has repeatedly demonstrated sex differences in the importance of different partner traits when choosing a mate. Here, men typically report higher preferences for younger, more physically attractive women, while women prefer men that are wealthier and of higher status. As the assessment of such partner characteristics often relies on visual cues, this raises the question whether visual experience is necessary in order for sex-specific mate preferences to develop. To shed more light onto the emergence of sex differences in mate choice, the current study assesses how preferences for attractiveness, resources, and personality factors differ between sighted and blind individuals. We further investigate the role of social factors and sensory cue selection in these sex-specific differences. Our sample consisted of 94 participants, 19 blind/28 sighted males, and 19 blind/28 sighted females. Results replicated well-documented findings in the sighted, with men placing more importance on physical attractiveness and women placing more importance on status and resources. However, while physical attractiveness was less important to blind men, blind women considered physical attractiveness as important as sighted women. The importance of a high status and similar personality was not influenced by sightedness. Blind individuals considered auditory cues more important than visual cues, while sighted males showed the opposite pattern. A good odor was generally rated as more important than other cues. Further, relationship status and indirect, social influences were related to preferences. Overall, our findings shed light on the emergence of sex-differences in mate preference by evaluating the influence previous exposure to certain partner characteristics has on the emergence of mate preferences.

Preliminary data, Millennials' philanthropic behavior: One cannot reject the hypothesis that Millennials donate more than members of earlier generations; but also seems true that are somewhat less likely to make any donations at all

Are Millennials Really Particularly Selfish? Preliminary Evidence From a Cross-Sectional Sample in the Philanthropy Panel Study. Peter Koczanski, Harvey S. Rosen. American Behavioral Scientist, May 28, 2019. https://doi.org/10.1177/0002764219850871

Abstract: We use panel data on charitable donations to analyze how the philanthropic behavior of Millennials (born between 1981 and 1996) compares with that of earlier generations. On the basis of a multivariate analysis with a rich set of economic and demographic variables, we find that conditional on making a gift, one cannot reject the hypothesis that Millennials donate more than members of earlier generations. However, Millennials are somewhat less likely to make any donations at all than their generational predecessors. While our data do not allow us to explore causal mechanisms, our findings suggest a more nuanced view of the Millennials’ prosocial behavior than is depicted in popular accounts.

Keywords: generosity, Millennials, selfishness, emerging adulthood theory, charity


Only cultural individualism, historic pathogen prevalence & food availability are relevant for sex differences in personality, which means that those differences are uniquely correlated to ecological stress

Nature and evoked culture: Sex differences in personality are uniquely correlated with ecological stress. Tim Kaiser. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 67-72. https://doi.org/10.1016/j.paid.2019.05.011

Abstract
Sex differences in personality were found to be larger in more developed and more gender-equal societies. However, the studies that report this effect either have methodological shortcomings or do not take into account possible underlying effects of ecological variables.

Here, a large, multinational (N = 867,782) dataset of personality profiles was used to examine sex differences in Big Five facet scores for 50 countries. Gender differences were related to estimates of ecological stress as well as socio-cultural variables. Using a regularized partial-correlation approach, the unique associations of those correlates with sex differences were isolated.

Sex differences were large (median Mahalanobis' D = 1.97) and varied substantially across countries (range 1.49 to 2.48). Global sex differences are larger in more developed countries with higher food availability, less pathogen prevalence, higher gender equality and an individualistic culture. After controlling for confounds, only cultural individualism, historic pathogen prevalence and food availability remained. Sex differences in personality are uniquely correlated to ecological stress. Previously reported correlations between greater sex differences and socio-cultural liberalism could be due to confounding by influences of ecological stress.

Recent changes in narcissism of Chinese youth, 2008–2017: Narcissism had a downward temporal trend; neither gender nor region moderated the trend; this finding challenged individualism was a global determinant of narcissism

Recent changes in narcissism of Chinese youth: A cross-temporal meta-analysis, 2008–2017. Shuang Gao et al. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 62-66. https://doi.org/10.1016/j.paid.2019.05.035

Highlights
•    Narcissism had a downward temporal trend among Chinese youth.
•    Neither gender nor region moderated the time trend.
•    The finding challenged individualism was a global determinant of narcissism.

Abstract: The present study examined potential changes in narcissistic traits of Chinese youth from 2008 to 2017. A cross-temporal meta-analysis involving 29 independent samples (N = 14,795) found a downward temporal trend: Mean scores on the Narcissistic Personality Inventory and Narcissistic Personality Inventory for Chinese are significantly negatively associated with year of data collection, weighted by sample size (β = −0.49). Moderator analyses found that this trend was independent of the measurement instrument used, gender distribution, or region of data collection. These findings contradict claims that Chinese youth have become more narcissistic of late. The findings also challenge the common assumption that societal increases in individualism are a global determinant of narcissism.

Drug users : High scores in the dimensions of novelty seeking & harm avoidance, & low scores in the dimensions of reward dependence, persistence, and self-directedness; in a pathological personality model most scores were high

Personality traits and substance use disorders: Comparative study with drug user and non-drug user population. Seyed GhasemSeyed Hashemi et al. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 50-56. https://doi.org/10.1016/j.paid.2019.05.015

Abstract
Objective: Personality traits play a vital role in addictive behaviors, drug addiction in particular.

Aim of study: To compare normal and pathological personality traits in drug users and non-drug users.

Methods: In this comparative study, we employed convenience sampling to recruit drug users (n = 110; 58 men and 52 women), from addiction treatment centers in a selected city in Azarbaijan province, and matched group of non-drug users (n = 110; 58 men and 52 women). The data were collected using demographic information questionnaire, Jakson-5 scale, Temperament and Character Cloninger (TCI), and Personality Inventory for DSM-5-Brief Form (PID-5-BF). The data were analyzed by chi square and multivariate analysis of variance (MANOVA).

Results: Two groups were significantly different in normal (r-RST, TCI) and pathological (PID-5) personality models. In TCI model, drug users gained high scores in the dimensions of novelty seeking and harm avoidance; and obtained low scores in the dimensions of reward dependence, persistence, and self-directedness. In r-RST model, they gained high scores in r-BAS and r-fight System; and obtained low scores in r-BIS. Also, in pathological personality model (PID-5), the scores of drug users were high in all of the dimensions except for detachment dimension.

Conclusion: Our findings suggest that personality traits are coincidence in drug users. Professional evaluation of drug using patients in order to differentiate normal and pathological personality models of them is recommended.

Moderating effect of emotional awareness on the association between maltreatment experiences and resilience

Moderating effect of emotional awareness on the association between maltreatment experiences and resilience. Sang Won Lee, Seunghee Won, Bumseok Jeong. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 38-44. https://doi.org/10.1016/j.paid.2019.05.037

Abstract: Childhood maltreatment experiences are closely related to aberrant emotional processing that may be associated with resilience. Although different stages of emotion processing, such as identification of emotion, selection of regulation strategies, and implementation of regulation strategies, can be affected by maltreatment experiences, it is still unclear which part of emotion processing is closely associated with the vulnerability the victims have. In this study, we investigated the effects of different emotion regulation strategies on psychological resilience. Among a total of 360 participants, 89 maltreatment and 112 no-maltreatment subjects were included in the analysis of a questionnaire survey. An additional cognitive reappraisal task was conducted in 25 maltreatment and 25 age-, gender-, and education-matched no-maltreatment subjects. The maltreatment group reported greater difficulties in identifying emotion, such as lack of emotional awareness or clarity. Moderation analysis revealed that lack of emotional awareness has a significant effect on the relationship between childhood maltreatment experiences and low psychological resilience. In the cognitive reappraisal task, the maltreatment subjects reported higher negative valence scores on ambiguous neutral pictures than the no-maltreatment subjects. Our results suggest that difficulties in emotional awareness, especially with ambiguous emotional cues, play a crucial role in low resilience in maltreatment victims.

Tuesday, May 28, 2019

When forecasting another individual's actions' outcome, we systematically overestimate the probability that the individual will win; due to a belief that the others generally achieve their intentions

Kupor, D., Brucks, M. S., & Huang, S.-C. (2019). And the winner is . . . ? Forecasting the outcome of others’ competitive efforts. Journal of Personality and Social Psychology, http://dx.doi.org/10.1037/pspa0000165

Abstract: People frequently forecast the outcomes of competitive events. Some forecasts are about oneself (e.g., forecasting how one will perform in an athletic competition, school or job application, or professional contest), while many other forecasts are about others (e.g., predicting the outcome of another individual’s athletic competition, school or job application, or professional contest). In this research, we examine people’s forecasts about others’ competitive outcomes, illuminate a systematic bias in these forecasts, and document the source of this bias as well as its downstream consequences. Eight experiments with a total of 3,219 participants in a variety of competitive contexts demonstrate that when observers forecast the outcome that another individual will experience, observers systematically overestimate the probability that this individual will win. This misprediction stems from a previously undocumented lay belief—the belief that other people generally achieve their intentions—that skews observers’ hypothesis testing. We find that this lay belief biases observers’ forecasts even in contexts in which the other person’s intent is unlikely to generate the person’s intended outcome, and even when observers are directly incentivized to formulate an accurate forecast.

We find that people showed a relative preference for lighter cultural products during relatively negative economic times, and, to a lesser extent, were slightly more open to heavier cultural products during boom periods

Hershfield, H. E., & Alter, A. L. (2019). On the naturalistic relationship between mood and entertainment choice. Journal of Experimental Psychology: Applied. http://dx.doi.org/10.1037/xap0000220

Abstract: People are sensitive to economic conditions, buying more during booms and less during recessions. Across seven studies, the present research examines whether the nature of their purchases also changes as diffuse, prevailing mood states shift from positive during boom periods to negative during recession periods. Existing research shows that people primarily strive to improve negative moods, whereas they are willing to encounter threatening information when they experience positive mood states. Consistent with these patterns, we find that people showed a relative preference for lighter cultural products during relatively negative economic times, and, to a lesser extent, were slightly more open to heavier cultural products during boom periods. According to archival dataset analyses, these effects persisted across comedic cartoons, music, books, and films. In 2 lab experiments, writing about boom versus recession periods changed preferences for lighter versus heavier cultural products.

Nationally representative sample: Buying sex is a relatively rare phenomenon among adult males; however, when accounting for multiple purchases & extrapolating to the entire population the estimated purchases is in the millions

Estimating the sex buying behavior of adult males in the United States: List experiment and direct question estimates. Dominique Roe-Sepowitz et al. Journal of Criminal Justice, Volume 63, July–August 2019, Pages 41-48. https://doi.org/10.1016/j.jcrimjus.2019.04.005

Highlights
•    Estimates from both the double list experiment and the direct ask question indicate 2–4% of men in the U.S. pay for sex.
•    Of the men who admit to paying for sex from a prostitute in the past 3 years, most say they have done so multiple times.
•    Applying this method to the general population results in an estimate of 4 million adult men purchasing sex in the past 3 years.
•    2/3 of the sample reported purchasing sex in person (as opposed to online).

Abstract
Purpose: Estimating the size of the sex buyer market in the United States has been stymied by methodological and sampling challenges. Given known methodological issues in self-reporting and the sensitive nature of purchasing sex, current research faces challenges in providing estimates of demand for purchasing sex. This study used a unique approach to estimate the prevalence of sex buying by men over the age of 18 in the United States.

Methods: This study employed a double list experiment and a direct ask question to a nationally representative sample of 2525 adult males to estimate the size of the sex buyer market in the United States.

Results: The double list experiment found the prevalence of sex purchasing is roughly 1 of every 50 adult males in the U.S. (2%) over the 3 years. The direct ask questions found that roughly 1 of every 25 males in the U.S. (4%) had purchased sex in the past 3 years. How they purchased and who they purchased sex from was also explored. A total of 80 respondents reported buying sex during the past 3 years. They spent an average of $120 for their most recent sex-buying encounter. Most sex buyers reported buying sex from an offline venue (street, bar, or massage parlor) and 81% purchased sex from a female. Applying the estimate of sex buying behavior to the general male population in the U.S. results in approximately 4 million men over the age of 18 purchasing sex the past 3 years.

Conclusions: The findings from both the double list experiment and the direct ask question indicate that buying sex is a relatively rare phenomenon among adult males, however, when accounting for multiple purchases and extrapolating to the entire population the estimated purchases is in the millions. Applying the double list experiment and a direct ask question to a nationally representative sample provides a new way to capture estimates while addressing some of the limitations of previous methods. Such findings have implications for both the criminal justice and public health sectors.

Children did not engage in third-party corporal punishment, even though they evaluated antisocial puppets as mean & understood that pressing the hit button hurt the puppets; the children lack a strong desire to corporally punish 3rd-parties

The development of corporal third-party punishment. Julia Marshall et al. Cognition, Volume 190, September 2019, Pages 221-229. https://doi.org/10.1016/j.cognition.2019.04.029

Abstract: Previous research has demonstrated that toddlers are willing to punish those who harm others. This work, however, has predominantly focused on punishment in the form of resource reduction—taking away a resource or withholding access to a resource from an antisocial other. Here, in two studies, we examined whether 4- to 7-year-old children (N = 141) engage in direct, corporal punishment against antisocial others in third-party contexts. Children were given the opportunity to press buttons so that antisocial and prosocial puppets would be hit with a hammer. In Study 1, younger children (∼4-year-olds) hit the antisocial and prosocial puppets indiscriminately, whereas older children (∼7-year-olds) tended to preferentially hit the antisocial puppet. In Study 2, we tested a larger sample of 4- to 7-year-olds, and found that none of the children engaged in corporal punishment. Collapsing across both Studies 1 and 2 also indicated a null effect—children did not engage in third-party corporal punishment. We observed these findings even though children evaluated the antisocial puppet as mean and understood that pressing the hit button hurt the puppets. These findings suggest that children lack a strong desire to corporally punish third-party social wrongdoers. Our results illustrate the importance of considering different types of punishment in assessing the development of third-party punishment, and raise questions about the development of corporal third-party punishment.

Machiavellianism was found to be linked to burnout in a component-specific manner; depersonalization was the prime mover of the Machiavellianism-burnout link; it was related to burnout in a sex-dependent fashion

An exploratory study of the link between Machiavellianism and burnout. Danijela Mirkovic, Renzo Bianchi. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 27-31. https://doi.org/10.1016/j.paid.2019.05.024

Highlights
•    Machiavellianism was found to be linked to burnout in a component-specific manner.
•    Depersonalization was the prime mover of the Machiavellianism-burnout link.
•    Emotional exhaustion was not substantially associated with Machiavellianism.
•    Machiavellianism was related to burnout in a sex-dependent fashion.
•    The Machiavellianism-depersonalization link appeared to be quadratic in women.

Abstract: This study investigated the link between Machiavellianism and burnout. A total of 1073 schoolteachers (83% female) completed an online survey. Machiavellianism was assessed with the MACH IV and burnout with the Maslach Burnout Inventory. General health status, job satisfaction, and life satisfaction were additionally evaluated using single-item measures. Machiavellianism correlated positively with burnout and its components (emotional exhaustion, depersonalization, and diminished personal accomplishment), and negatively with general health status, job satisfaction, and life satisfaction. The burnout-Machiavellianism association appeared to be primarily driven by the depersonalization component of burnout. In women, the relationship between Machiavellianism and depersonalization was better accounted for by a quadratic model, following a U-shaped curve. In men, a quadratic model did not outperform a linear model. Compared to low-Machiavellianism women, high-Machiavellianism women exhibited higher levels of burnout and depersonalization and lower levels of personal accomplishment, job satisfaction, and life satisfaction. High-Machiavellianism men exhibited higher levels of burnout and depersonalization than low-Machiavellianism men. Overall, no substantial association was found between Machiavellianism and emotional exhaustion―the core symptom of burnout. Our findings suggest that Machiavellianism is linked to burnout in a component-specific, sex-dependent, and partly nonlinear fashion. The practical importance of the burnout-Machiavellianism association requires clarification.

Norms exist regarding the spillover of political considerations into nonpolitical matters: When one's copartisans discriminate against members of the other party, it can lead to decreased partisan identification and depolarization

Political Consequences of Partisan Prejudice. Richard M. Shafranek. Political Psychology, May 27 2019. https://doi.org/10.1111/pops.12596

Abstract: Political conflict sometimes spills over into unrelated areas of our lives. A growing literature documents examples of partisan considerations influencing judgments and behaviors in ostensibly nonpolitical contexts such as the workplace, academia, and dating, among others. To date, the focus has been on demonstrating these phenomena, with scant consideration of their downstream effects. When politics spills over into nonpolitical settings—that is, when political considerations influence nonpolitical judgments or behaviors—what are the consequences? I address this question with a novel theory and a nationally representative survey experiment. I find that norms exist regarding the spillover of political considerations into nonpolitical matters—and that spillover can have its own political consequences. When one's copartisans discriminate against members of the other party, it can lead to decreased partisan identification and depolarization. Partisan discrimination in nonpolitical settings can—in some sense ironically—reduce affective polarization. That said, partisans also appear to hold a double standard: They expect copartisans to give an edge to fellow copartisans.

Fecal microbiota transplantation is a highly effective therapy for recurrent Clostridioides difficile infection; donors are essential, but difficult to recruit and retain; males and blood donos are more willing to consider stool donation

In search of stool donors: a multicenter study of prior knowledge, perceptions, motivators, and deterrents among potential donors for fecal microbiota transplantation. Breanna McSweeney et al. Gut Microbes, May 23 2019. https://doi.org/10.1080/19490976.2019.1611153

ABSTRACT: Fecal microbiota transplantation (FMT) is a highly effective therapy for recurrent Clostridioides difficile infection. Stool donors are essential, but difficult to recruit and retain. We aimed to identify factors influencing willingness to donate stool. This multi-center study with a 32-item questionnaire targeted young adults and health care workers via social media and university email lists in Edmonton and Kingston, Canada; London and Nottingham, England; and Indianapolis and Boston, USA. Items included baseline demographics and FMT knowledge and perception. Investigated motivators and deterrents included economic compensation, screening process, time commitment, and stool donation logistics. Logistic regression and linear regression models estimated associations of study variables with self-assessed willingness to donate stool. 802 respondents completed our questionnaire: 387 (48.3%) age 21-30 years, 573 (71.4%) female, 323 (40%) health care workers. Country of residence, age and occupation were not associated with willingness to donate stool. Factors increasing willingness to donate were: already a blood donor (OR 1.64), male, altruism, economic benefit, knowledge of how FMT can help patients (OR 1.32), and positive attitudes towards FMT (OR 1.39). Factors decreasing willingness to donate were: stool collection unpleasant (OR 0.92), screening process invasive (OR 0.92), higher stool donation frequency, negative social perception of stool, and logistics of collection/transporting feces. We conclude that 1) blood donors and males are more willing to consider stool donation; 2) altruism, economic compensation, and positive feedback are motivators; and 3) screening process, high donation frequency, logistics of collection/transporting feces, lack of public awareness, and negative social perception are deterrents. Considering these variables could maximize donor recruitment and retention.

KEYWORDS: Fecal microbiota transplantation (FMT), Clostridioides difficile infection (CDI), recurrent Clostridioides difficile infection (RCDI), fecal transplant donors, stool donors

Are narcissistic athletes mentally tough?Admiration (i.e., agentic narcissism) would be positively associated with mental toughness, whereas rivalry (i.e., antagonistic narcissism) would be negatively related

The effect of narcissistic admiration and rivalry on mental toughness. Harry Manley et al. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 1-6. https://doi.org/10.1016/j.paid.2019.05.009

Abstract: Are narcissistic athletes mentally tough? Here we examined the effect of narcissistic admiration and rivalry on mental toughness. Based on their contrasting behavioural correlates and cognitive affective-motivational basis, we predicted that admiration (i.e., agentic narcissism) would be positively associated with mental toughness, whereas rivalry (i.e., antagonistic narcissism) would be negatively related to mental toughness. In a sample of elite Thai athletes (N = 297), we assessed narcissistic admiration and rivalry, self-esteem, self-reported mental toughness, and coach ratings of mental toughness for a subset of athletes. Narcissistic admiration was positively associated with self and coach-ratings of mental toughness. In contrast, narcissistic rivalry was negatively associated with self and coach-ratings of mental toughness. These effects were independent of self-esteem and stress the importance of considering both the agentic and antagonistic sides of narcissism when addressing narcissism's relationship with mental toughness.

Both sexes wanted a long-term mate who is equally educated than they are; women wanted a short-term mate equally educated, unlike men; also, men's sexual/romantic desire was less sensitive to prospective mate's education

Mate preferences for educated partners: Similarities and differences in the sexes depend on mating context. Author links open overlay panel. Peter K. Jonason, Caitlin N. Antoon. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 57-61. https://doi.org/10.1016/j.paid.2019.05.036

Highlights
•    Both sexes wanted a long-term mate who is equally educated than they are.
•    Women wanted a short-term mate who is equally educated than they are.
•    Men wanted a short-term mate who is less educated than they are.
•    Men's sexual/romantic desire was less sensitive to prospective mate's education.
•    Interpersonal warmth had independent and similar effects on desirability.

Abstract: Evolutionary and sociocultural models of mate preferences suggest that education might be an important consideration for men and women, but this research is characterized by several limitations warranting more research. In this experiment (N = 1306), we focused on the impact of relative levels of education on the desirability of potential long-term and short-term mates, while holding physical attractiveness constant, and also examining the potential moderating influence of interpersonal warmth. Both sexes preferred mates of equal education (compared to less or more), for both relationship durations, but particularly for long-term mates. Men found less educated and interpersonally cold targets more appealing in the short-term context. Overall, men found targets more appealing than women did across both mating contexts. Our results replicate and extend research on the role of partner's education in people's mate preferences.

Monday, May 27, 2019

Pornography preferences, short-term mating, and infidelity: Men exhibit more interest in group sex scenarios than women, & intentions to commit infidelity are also associated with greater interest in group sex scenarios

Evolutionary approaches: Integrating pornography preferences, short-term mating, and infidelity. Catherine Salmon, Maryanne L. Fisher, Rebecca L. Burch. Personality and Individual Differences, Volume 148, 1 October 2019, Pages 45-49, https://doi.org/10.1016/j.paid.2019.05.030

Abstract: There are a number of questions concerning human sexual psychology where pornography consumption may be particularly informative, yet evolutionary psychologists have been slow to incorporate it into research designs. This study examines the relationships between pornography preferences, individual's sex, proxies for short-term mating strategies (e.g., life history strategy, sociosexuality), and infidelity. For example, we predict that men, more than women, will be interested in group sex (i.e., threesomes and gangbang) scenarios in pornography as a result of selective pressures for sperm competition. Further, specific activities and sexual situations in pornography are likely to be differentially appealing based on the sexual strategies pursued by consumers. Thus, women who have higher, versus lower, intentions of committing infidelity will be more interested in activities like group sex, given the latter involves no commitment. Results suggest that men exhibit more interest in group sex scenarios than women, and intentions to commit infidelity are also associated with greater interest in group sex scenarios. Collectively, our findings demonstrate the usefulness of incorporating consumption of pornography measures in evolutionary social psychological research.


Self-esteem plays an important role in the development of partisanship among young people, where those with higher self-esteem are more likely to adopt a partisan identity than those with low self-esteem

Self-Esteem and the Development of Partisan Identity. Jennifer Wolak, Carey E. Stapleton. Political Research Quarterly, May 21, 2019. https://doi.org/10.1177/1065912919851556

Abstract: Why do young people choose to identify with a political party? While existing accounts emphasize the importance of political socialization, we propose that young people’s self-perceptions also influence the adoption of partisan identities. Using survey data from the National Longitudinal Survey of Youth, we show that self-esteem plays an important role in the development of partisanship among young people, where those with higher self-esteem are more likely to adopt a partisan identity than those with low self-esteem. Using responses from the 2012–2013 American National Election Study, we further show that the effects of self-esteem are concentrated among young adults, promoting the adoption of partisan identities during one’s impressionable years. By focusing on the inheritance of partisanship from one’s parents, scholars have underestimated the importance of young people’s traits in influencing the development of partisan identities.

Keywords: partisanship, partisan identity, self-esteem, political socialization

Most research has found that people exhibit altruism towards attractive people, suggesting altruistic behavior is driven by mate choice motivation

The role of prosocial behaviors in mate choice: A critical review of the literature. Manpal Singh Bhogal, Daniel Farrelly, Niall Galbraith. Current Psychology, May 27 2019. https://link.springer.com/article/10.1007/s12144-019-00308-8

Abstract: Research has focused on the role of prosocial behaviors in mate choice, across both social and evolutionary psychology. Several studies provide strong support for the role of altruism in mate choice, whereby people find prosociality attractive in potential mates. As most research focuses on the role of altruism in mate choice, most research has found that people exhibit altruism towards attractive people, suggesting altruistic behavior is driven by mate choice motivation. Although studies have supported the notion that men’s altruism towards women is driven by mate choice, the findings are inconsistent, which may be due to the methodologies adopted by researchers. To our knowledge, this review paper is the first to critically review the literature concerning prosociality and mate choice. We provide an outline of the research thus far, methodological issues, and considerations for future research.

Keywords: Mate choice Prosocial behavior Sexual selection Game theory

Check also Further support for the role of heroism in human mate choice. Manpal Singh Bhogal & James E Bartlett. https://www.bipartisanalliance.com/2019/08/both-men-and-women-found-heroic-targets.html

---
Inside The role of prosocial behaviors in mate choice: A critical review of the literature. Manpal Singh Bhogal, Daniel Farrelly, Niall Galbraith...

Altruism as a Desirable Trait in Long-Term Romantic Partners

Research suggests that prosocial traits such as altruism and cooperation are sexually selected traits (Miller 2000, 2007; Tessman 1995; Zahavi 1995), increasing one’s chances of securing mating opportunities (Gintis et al. 2001). Farrelly et al. (2007) suggest that investing in altruistic ventures is important to both sexes, as it provides valuable information when engaging with, and evaluating a potential mate. Being willing to share may signal commitment to a relationship, as well as signalling a generous nature, which may be of more importancetowomen,aswomenvalueaman’sabilitytogain and share resources (Tessman 1995), thus strengthening the argument that altruism acts as a courtship display and is a reliable indicator of mate quality (Miller 2007). Furthermore, according to Parental Investment Theory (Trivers 1972), women invest far more into offspring thanmen do, and therefore choose partners who display good partner/parental qualities. In support, altruistic men are expected to be better partners and fathers than non-altruistic men (Miller 2000, 2007). As a result, altruism contributes to one’s mating efforts and reproductive success, which according to Roberts (2015) has been ‘overlooked’ (p. 425) in the literature. Much of the research exploring the desirability of altruistic mates began with Barclay (2010), who manipulated altruism and non-altruism in a series of vignettes. He found that men and women (particularly women) found altruistic targets to be more desirable for longterm relationships compared to short-term relationships. Furthermore, using a modified version of Buss’s Mate Preferences Questionnaire (Buss 1989), Bhogal et al. (2019) found that women placed higher importance on altruism when seeking long-term, compared to shortterm relationships, signifying the powerful role of relationship length in preferences for altruistic partners. They also found that women placed greater importance on cooperativeness in a mate compared to men, although this preference was not influenced by relationship length. Research suggests that women prefer altruistic partners (Moore et al. 2013), and this preference is particularly important when seeking long-term relationships (Farrelly 2013; Farrelly et al.2016). Moore et al. (2013) found that altruistic targets were rated as more attractive than nonaltruistic targets. Farrelly (2013) found that both men and women valued altruistic mates when seeking long-term partners compared to short-term partners, a finding which has been recently replicated by Farrelly and King (2019). Farrelly et al. (2016) argue that altruism is a sign of phenotypic quality, as opposed to singularly relaying genetic quality. In support, Farrelly (2011) found that women valued cooperative partners when seeking long-term relationships more than when seeking a short-term relationship. Farrelly (2011) found that preferences did not differ across women’s menstrual cycle, thus suggesting altruism is attractive because it signals phenotypic rather than genetic quality. Furthermore, Farrelly et al. (2016) explored the role of altruism and physical attractiveness when seeking a longterm/short-term relationship. Women rated a series of attractive and unattractive male images, accompanied by scenarios, where they were asked to rate the desirability of men in 12 scenarios including varying levels of altruism. They found that women rated those who were altruistic as more desirable than non-altruistic, seeking longterm mates only. However, non-altruists were more desirable than altruists when women were seeking a shortterm mate. Perhaps this is because altruism signals one’s positive traits and is indicative of future behavior as a parent and partner rather than genetic quality (Farrelly 2011, 2013). However, Farrelly et al. (2016) argue that a limitation of using scenarios and hypothetical situations in research on mate choice, is that these descriptions may relay other qualities, apart from altruism alone, such as heroism or strength. In support, Kelly and Dunbar (2001) found that women rate brave men higher on desirability compared to altruistic men for short and long-term mates. This could be exploredinfutureresearch, asthere isa finelinebetween acts of heroism that are altruistic, and altruism in the form of generosity in economic games. To conceptualise the different explanations for the evolution of altruism, it is important to assess why prosocial tendencies appear to be so important in mate choice. Perhaps research should explore the costs related to the altruistic acts being displayed. For example, recent evidence has unpacked prosociality by exploring its varying facets, such as heroism (Margana et al. 2019) and trustworthiness (Ehlebracht et al. 2018). Margana et al. (2019) found that women were attracted to attractive, heroic men more so than attractive, altruistic men. This preference was stronger when seeking long-term relationships compared to short-term relationships, providing further support that research must unpack the varying facets of prosocial behavior and mate choice. Thus far, research has largely focused on altruistic and cooperative behavior in mate choice settings, largely ignoring other forms of prosociality (also see Norman and Fleming 2019). In addition to unpacking prosociality, research seldom focuses on high vs low cost altruism in relation to mate choice. For example, Fitzgerald et al. (2010) argue that differences in self-reported altruism are influenced by whether the altruistic act is of small or of high cost to the altruist. Future research shouldtakethis into account, as there also appear to be differences in self-reported altruism and hypothetical scenarios (see Tables 1 and 2 for the varying resources and stakes used across the research reviewed here1). Although much of the research has found that women express an interest in dating altruistic men, recent findings suggest that in Chinese students, women advertised themselves as altruistic, and men were attracted to altruistic traits in women (Guo et al. 2017). Interestingly, they found the preference for altruistic mates was not influenced by whether they were seeking a short-term or long-term partner, thus suggesting there maybecultural differences in preferences for altruism in mate choice, which to our knowledge have not been fully explored in the literature. Perhaps future research could explore cultural influences on mate preferences for prosocial behaviors in mate choice, as most research exploring these constructs has been conducted in Western cultures. Cultural influences could be prevalent whereby it is against the norm to be non-altruistic, which is more prevalent in Eastern, collectivist cultures compared to Western, individualistic cultures (Yama 2018). One final discussion point for this section relates to mutual mate choice (Snowdon 2013). Farrelly and King (2019) argue that researchers must explore the role of mutual mate choice in the evolution of altruism rather than focusing solely on female mate choice. Although most research discussed (particularly those finding a sex difference in preferences for altruism outlined in Table 1) finds that women prefer altruistic mates to a greater extent compared to men, there is emerging literature which suggests that altruism has not only evolved via female choice, but via mutual mate choice. Mutual mate choice refers to when men and women both exercise similar choice and control over the traits they seek in a romantic partner (Farrelly and King 2019). The argument here relates to the fact that altruism signals good parental and partner qualities, which can also be important to men, particularly as men and women engage in bi-parental care (Phillips et al. 2008). For example, Farrelly and King (2019) recently found that when asking participants to state how desirable altruistic targets are as potential mates, desirability ratings are very similar. This pattern has also been found in Farrelly (2013) whereby, although women rated altruistic targets as more desirable compared to men, men still rated altruistic women as desirable partners. This signifies the point that although altruism is more important to women in mate choice, this does not necessarily mean men are also not attracted to altruistic tendencies in women. So far, we have discussed research exploring the desirability of prosocial behaviors in mate choice. We will now discuss the literature aiming to investigate whether men and women display prosocial acts, or public displays of altruism towards potential mates, using a variety of experimental designs, stimuli, and monetary resources.

Feral horses: Kin and non-kin of both sexes showed unusual interest in a dying foal; however, horses appeared to avoid dead conspecifics

Feral horses’ (Equus ferus caballus) behavior toward dying and dead conspecifics. Renata S. Mendonça et al. Primates, May 27 2019. https://link.springer.com/article/10.1007/s10329-019-00728-x

Abstract: In the rapidly expanding field of comparative thanatology, reports from a wide range of taxa suggest that some aspects of a concept of death may be shared by many non-human species. In horses, there are only a few anecdotal reports on behaviors toward dead conspecifics, mostly concerning domestic individuals. Here, we describe the case of a 2-month-old, free-ranging male foal that died around 12 h after being found severely injured due to a presumed wolf attack, focusing on other individuals’ reactions to the dying foal. We also placed camera traps near horse carcasses to investigate reactions by other horses. Kin and non-kin of both sexes showed unusual interest in the dying foal. However, horses appeared to avoid dead conspecifics. Recording individual reactions to dead and dying conspecifics in naturalistic settings will enhance our knowledge about death-related behaviors in horses, allowing comparisons with other species that have been more thoroughly studied, to understand the evolutionary basis of these behaviors.

Keywords: Horse Death-related behaviors Thanatology Awareness of death Wolf attacks Injured individual

20 years of earnings data on Finnish twins: About 40% of the variance of women’s & little more than half of men’s lifetime labour earnings are linked to genetic factors; shared environment contribution is negligible

Heritability of lifetime earnings. Ari Hyytinen & Pekka Ilmakunnas & Edvard Johansson & Otto Toivanen. The Journal of Economic Inequality, May 14 2019. https://doi.org/10.1007/s10888-019-09413-x

Abstract: Using twenty years of earnings data on Finnish twins, we find that about 40% of the variance of women’s and little more than half of men’s lifetime labour earnings are linked to genetic factors. The contribution of the shared environment is negligible. We show that the result is robust to using alternative definitions of earnings, to adjusting for the role of education, and to measurement errors in the measure of genetic relatedness.

Keywords Earnings inequality . Heritability . Twins . Genetics