Wednesday, October 6, 2021

The dominant theory of facial attractiveness judgments is that they evolved to identify healthy individuals with strong immune systems; this paper finds little compelling empirical support

Does facial attractiveness really signal immunocompetence? Benedict C. Jones, Iris J. Holzleitner, Victor Shiramizu. Trends in Cognitive Sciences, October 5 2021. https://doi.org/10.1016/j.tics.2021.09.003

Abstract: The dominant theory of facial attractiveness judgments is that they evolved to identify healthy individuals with strong immune systems. Here, we summarize results of recent tests of this hypothesis, concluding that it has little compelling empirical support. We then propose an alternative perspective that emphasizes the effects of lifestyle health.


Human male reproduction exhibits distinct and derived features: Long-term reproductive partnerships, intensive paternal care including provisioning, shortened interbirth intervals, and later age-specific fertility than great ape comparisons

Men and reproduction: Perspectives from biological anthropology. Peter B. Gray, Alex Straftis, Kermyt G. Anderson. Chp in The Routledge Handbook of Anthropology and Reproduction, Routledge. ISBN 9781003216452. https://www.taylorfrancis.com/chapters/edit/10.4324/9781003216452-5/men-reproduction-peter-gray-alex-straftis-kermyt-anderson

Abstract: Charles Darwin left an intellectual legacy to human evolution and sexual selection that still frames our understanding of men and reproduction. Here, we take an integrative approach to men and reproduction and, like Darwin and his intellectual descendants, seek to incorporate evolutionary theory, comparative evidence, a life course approach, physiology, and human diversity. We discuss theoretical foundations, such as life history tradeoffs and proximate vs. ultimate causation. We turn to a model of male reproduction that highlights age-specific fertility and multiple modes of paternal contributions. Human male reproduction exhibits distinct and derived features: Long-term reproductive partnerships, intensive paternal care including provisioning, shortened interbirth intervals, and later age-specific fertility than great ape comparisons. Male contributions can include genetics, epigenetics, protection, provisioning, direct child care, and social transmission. While male investment is often sensitive to paternity and paternity certainty, stepfathering indicates other motivations beyond genetic paternity can shape investment. We discuss developmental, male–male competition, and female choice contributions to male reproduction. We then turn to consequences of reproduction for men, highlighting time allocation, relationship dynamics, physiological, health, and other primary impacts. Last, we touch on the consequences of men’s reproduction for other adults such as mates and for men’s children.


Female bonobos engaged more in genito-genital rubbing when their sexual swelling was in the maximum phase, exchanging grooming & sex according to the daily “market fluctuations” associated with swelling status

Sex and grooming as exchange commodities in female bonobos’ daily biological market. Simone Anzà, Elisa Demuru & Elisabetta Palagi. Scientific Reports volume 11, Article number: 19344. Sep 29 2021. https://www.nature.com/articles/s41598-021-98894-w

Abstract: The Biological Market Theory (BMT) posits that cooperation between non-human animals can be seen as a mutually beneficial exchange of commodities similarly to what observed in human economic markets. Positive social interactions are commodities in non-human animals, and mutual exchanges fulfilling the criteria of the BMT have been shown in several species. However, the study of biological markets suffers from methodological limitations that are mainly linked to the difficulty of clearly identifying the currencies and their exchanges in the short-term. Here, we test whether bonobo females are more attractive during their maximum swelling phase, whether they exchange grooming and Genito-Genital Rubbing (GGR) on a daily level of analysis, and whether these daily exchanges fulfil the BMT criteria. Females engaged more in GGR when their sexual swelling was in the maximum phase. Moreover, they exchanged grooming and sex according to the daily “market fluctuations” associated with swelling status. Females in the minimum phase (low-value) increased their probability to engage in GGR with females in the maximum phase (high-value) by grooming them preferentially. In line with the supply/demand law, the female grooming strategy varied depending on the daily number of swollen females present: the higher the number of swollen females, the lower the individual grooming preference. As a whole, our study confirms BMT as a valid model to explain daily commodity exchanges as a function of the temporary value of traders, and underlines the importance of a day-by-day approach to unveil the presence of a biological market when the value of traders frequently changes.

Discussion

Taken together, our results confirm the key role of sexual swelling in bonobos and provide new insights on the exchange of grooming with sex on a daily basis. More particularly, our study shows that grooming and sex represent valuable exchange commodities for bonobo females and that their exchange fluctuates depending on females’ sexual swelling status. These daily fluctuations can be explained by the supply/demand law1. In line with other studies on sexual swelling and socio-sexual behaviour in bonobos35,36, our results confirmed that females engaged significantly more in Genito-Genital Rubbing (GGR) when at least one female of the dyad was in the maximum swelling phase, compared to when both of them were in the minimum swelling phase (Prediction 1). When in the maximum swelling phase, females are more attractive for both males and females and tend to be invited more frequently to engage in sexual interactions than females in the minimum swelling phase26. This is in line with the hypothesis proposing that the peculiar features of bonobo females’ sexual swelling, and in particular its extremely long duration and presence during anovulatory periods, might have been selected to increase female-female sexual interactions35. Socio-sexuality in bonobo females help establishing and maintaining strong social bonds which, in turn, allow them to form coalitions that increase their social status and centrality30.

According to the Biological Market Theory derived from the Market Theory applied in economics, the exchange rate of commodities depends on the supply/demand law, and when a certain commodity becomes common, its perceived value decreases. Consistent with the supply/demand law, the daily grooming preference was significantly affected by the number of females showing the sexual swelling at the maximum phase during the same given day: the higher the number of swollen females, the lower the daily grooming preference (Prediction 2a, Fig. 1). Interestingly, when both the actor and the receiver were in the minimum swelling phase, and there were no females available in the maximum swelling phase, the grooming preference was very high. Via Model 1 we considered the directional grooming preference and we included the preference of both dyads AB and BA. Therefore, our results suggest that females exchanged grooming for grooming when both in the minimum swelling phase. Moreover, the significant effect of the interaction swellingact*swellingrec showed higher grooming preference when both the actor and the receiver were in the maximum swelling phase, compared to when the actor was in the minimum and the receiver was in the maximum swelling phase. These results confirm the higher attractiveness of females showing the maximum swelling phase (Prediction 1, 2b), suggest that females tend to exchange grooming for grooming when their value is “low” (MIN) and that high-value females (MAX) prefer “high-value” grooming partners as well.

Our results on the effect of the number of swollen females on grooming preference are in line with a study on male–female grooming in captive chimpanzees11 showing that females in the maximum swelling phase receive more grooming. Although our investigation focussed on female-female sexual interactions, our results are in line with those of chimpanzees given that the highest daily preference was achieved when both actor and receiver were in the maximum swelling phase. The results coming from the two Pan species are comparable considering the high attractiveness of the maximum sexual swelling in both chimpanzees and bonobos although in chimpanzees the sexual swelling is attractive for males only, while in bonobos this signal is attractive for both sexes.

In many primate groups, higher-ranking subjects typically receive more grooming than lower-ranking ones51,52,53 and most of the grooming occurs between subjects with similar rank54. Among bonobos, the distribution of grooming is related to several variables (e.g., age, rank, and sex) and there are some indications that high-ranking and older females are preferred grooming partners55. Subjects within the same group may therefore compete for grooming access to high-ranking groupmates, since those can be the best coalition partners52,54. Alternatively, a grooming distribution related to rank can be explained by females’ preference in grooming subjects of similar social class (e.g., rank and age) as an adaptive strategy derived from greater compatibility between subjects56. These mechanisms are beyond the aim of our investigation but can still drive the variation of grooming preferences and mask the effect of the daily market. For this reason, we included in our models rank and age of both actor and receiver as control predictors. However, our results on the daily grooming preference showed no effect of actor and receiver’s rank and age, suggesting that the factors shaping grooming preference among bonobo females on a daily basis may not coincide with those affecting such preference on the long term. Moreover, it has been showed that the steepness of the hierarchy varies between different bonobo groups in captivity20,25. Particularly, these studies demonstrated that grooming was preferentially directed towards dominant individuals in those groups where the hierarchy was very steep, whereas grooming was more reciprocal in those groups showing a mild hierarchy. It is worth noting that the steepness of our study groups was extremely low (Apenheul: 0.346; La Vallée: 0.305 unpublished data).

The daily occurrence of GGR was significantly affected by the number of females in the maximum swelling phase: the higher the number of swollen females, the lower the daily occurrence of GGR (Prediction 3a). Post-hoc analyses revealed no significant effect of grooming preference on the daily occurrence of GGR when the actor was in the maximum swelling condition and the receiver was in the maximum or minimum swelling condition (Fig. 3b). On the other hand, when an actor in the minimum swelling phase preferentially groomed a receiver in the maximum swelling phase, it significantly increased the probability of engaging in GGR compared to when the receiver was in the minimum swelling phase (Prediction 3b, Fig. 3a). This might indicate that: (1) when both partners are in the minimum swelling phase, none of them has the “economic power” to influence the exchange of goods and grooming is therefore not exchanged with sex (Fig. 3a; MIN-MIN), and that (2) lower-value females (MIN) need to provide more grooming to get the access to higher-value partners (Fig. 3a; MIN–MAX). However, this strategy seems to work only when is the receiver (of grooming/sexual invitations) who benefits from the mismatch, especially if we consider that an increase of grooming performed by a high-value actor does not increase the chances of engaging in sexual interactions: a high-value actor has a constant chance of engaging in sexual interactions despite receiver’s value (Fig. 3b; MAX–MIN, MAX-MAX). The results from Model 1 and Model 2 are consistently stressing that grooming can be performed to balance the mismatch in females’ value, and when the partners have equal value, grooming can be exchanged for grooming as well.

Females in the minimum swelling phase exhibit a short-term strategy of exchanging commodities shaped by the supply/demand law and receiver’s value. Given that females in the maximum swelling phase are more sexually (and therefore socially) attractive, females in the minimum swelling phase must augment the commodity they provide to increase their possibility of engaging in sexual interactions with higher-value females. Furthermore, by strategically offering more grooming, lower-value females can even outcompete higher-value ones to gather “sexual favours” from the most attractive partners.

In conclusion, our study confirms the BMT in explaining the daily exchange of commodities and its fluctuations as a function of the temporary value of traders, and underlines the importance of a day-by-day approach to unveil the presence of a biological market when the value of traders rapidly changes.

Americans perceived political ingroups as more prototypical of Americans; perceiving the outgroup as poorly fitting the prototype of the superordinate group predicted opposition to bipartisan cooperation and a lower likelihood of bipartisan behavior

Ingroup Projection in American Politics: An Obstacle to Bipartisanship. Angela C. Bell et al. Social Psychological and Personality Science, October 5, 2021. https://doi.org/10.1177/19485506211046788

Abstract: One potential obstacle to cooperation between political parties is ingroup projection, the tendency for members of subgroups to define superordinate groups based on characteristics of their own ingroups. In five studies spanning 11 years and three presidential administrations, we demonstrated that ingroup projection can be an obstacle that prevents bipartisanship between Republicans and Democrats. Study 1 showed that Americans perceived political ingroups as more prototypical of Americans than outgroups and that the degree of mismatch between the outgroup and the superordinate group was associated with ingroup bias. Studies 2–5 demonstrated that perceiving the outgroup as poorly fitting the prototype of the superordinate group predicted opposition to bipartisan cooperation and a lower likelihood of having engaged in bipartisan behavior (Studies 4 and 5). These studies provide evidence for ingroup projection among American political parties and suggest that it contributes to political polarization.

Keywords: bipartisanship, ingroup projection, polarization, common ingroup identity, social identity theory


Stability and change in major life goals during the transition to parenthood: Little evidence that parenthood leads to change in major life goals

Stability and change in major life goals during the transition to parenthood. Caroline Wehner, Manon A. van Scheppingen, Wiebke Bleidorn. European Journal of Personality, March 1, 2021. https://doi.org/10.1177/0890207021996894

Abstract: The transition to parenthood introduces changes in various life domains. In this paper, we examined whether and to what degree the transition to parenthood is related to changes in the importance of major life goals. To do this, we examined the rank-order stability, ipsative stability, and mean-level change in six life goal domains (achievement, power, variation, affiliation, altruism, and intimacy) in a sample of 248 parents and 294 individuals in a romantic relationship without children across two time points. Overall, we found high rank-order (variable-oriented) and ipsative (person-oriented) stability, and little evidence for mean-level changes in the importance of life goals across the transition to parenthood. However, we found several selection effects suggesting that women without children tended to endorse agentic life goals (variation and achievement) more than mothers did. Generally, our findings underline the overall stability of life goals and their role as guiding principles in life.

Keywords: life goals, development, parenthood, period of transition, life event

In the present study, we observed stability and change of life goals in first-time parents and couples without children. We examined stability using a variable-oriented (rank-order stability) and a person-oriented approach (ipsative stability). Both indices indicated high stability in parents’ and nonparents’ life goals over the course of one year. Expecting mothers but not fathers differed from nonparents in several goal domains prior childbirth (selection effects). However, we found little evidence for mean-level change in general, or for differences in the mean-level change trajectories of parents and nonparents (socialization effects). Overall, these results suggest that the importance of major life goals is quite stable, even amid a major life event such as the transition to parenthood. As such, selection rather than socialization effects appear to explain the differences in life goals between parents and nonparents.

How stable are life goals?

The rank-order stability of all goal dimensions was high and in the range of previous findings (e.g., r = .65 – .75 in Lüdtke et al., 2009). There were only few differences between parents and nonparents. Mothers appeared to be less rank-order stable than nonmothers in their endorsement of variation, and fathers appeared less stable than nonfathers in achievement. These results are consistent with our hypothesis of lower stability in parents. Notably, both variation and achievement are agentic goals which leads to the question why stability in parents tends to be lower in agentic but not in communal goals. One explanation may be that communal goals are generally more stable, which may express itself in transitional periods such as parenthood or in the long-term. Atherton et al. (2020) found some evidence that goals’ stability tends to be higher in communal goals (family/relationship r = .58, social r = .44) than in agentic goals (economic r = .36; but political r = .46) across 24 years. Overall, however, parenthood had a smaller effect on the rank-order stability of life goals than we expected given the profound impact parenthood entails on people’s resources, life style, and routines. Notably, the limited sample size in each group resulted in relatively large confidence intervals which made their comparison a rather conservative test.

Not only the rank-ordering of individuals along the goal dimensions but also the rank-ordering of goal dimensions within individuals – the ipsative stability of life goals – was high in both parents and nonparents. That means, independent of the parenthood status for most individuals the order in the importance of their life goals did not change across the study period. However, we explored and found significant differences between women and men indicating that even though both genders were highly stable, men were slightly less consistent in the ranking of their life goals.

In summary, results for both indicators of stability, variable- and person-oriented, emphasized that life goals are rather stable constructs, even in the face of a major life event such as the transition to parenthood. This finding is consistent with the life goals literature that has highlighted their function as guiding principles that provide direction and consistency across situations and roles (Hennecke & Freund, 2017Roberts & Robins, 2000).

However, high levels of rank-order and ipsative stability do not exclude the possibility of mean-level change in major life goals. To test whether life goals change during the transition to parenthood, we compared parents’ and nonparents’ life goals before and after the transition to parenthood.

Do parents and nonparents differ in their life goals?

As hypothesized, we found evidence for selection effects indicating that mothers and nonmothers differ in their life goals. Specifically, compared to nonmothers, mothers scored generally lower in the agency-related goals achievement and variation. This finding is consistent with our hypothesis that expecting mothers prioritize specific life goals. Indeed, the transition to parenthood might reflect certain goals, such as the idea to settle down, i.e. allows for less variation. The robust selection effect of low openness to experience (e.g., van Scheppingen et al., 2016), which is among others defined by a preference for variety and curiosity, is also in line with our finding of less variation in mothers. In qualitative interviews, Bass (2015) found that women tended to downshift their career goals, i.e. achievement, in anticipation of parenthood. Men, in comparison, usually did not do so, which is in line with our finding of no differences between fathers and nonfathers. This might be particularly pronounced in our Dutch sample, as the Netherlands have by far the highest rate of part-time employment in women compared to their neighboring countries (OECD, 2019) and a relatively short leave for fathers. We further hypothesized but found no selection effects for communal goals. As pointed out above, communal goals might be more stable than agentic goals (Atherton et al., 2020) and thus are less prone to change in general.

Is parenthood associated with change in life goals?

Previous research established age-graded mean-level decreases in life goal importance, particularly during young adulthood (Atherton et al., 2020; Roberts et al., 2004). This pattern might be a result of age-graded decreases in resources (Lüdtke et al., 2009Roberts et al., 2004) that tend to occur as a consequence of life events such as the transition to parenthood. Goal selection, i.e. decrease in most life goals’ importance, which is assumed to ensure functioning and effective goal pursuit (Baltes et al., 2006), may be accelerated by major life events. Consistent with these assumptions, we expected mean-level decreases in most life goals, particularly in parents, as they should experience an even greater decrease in resources than nonparents (see for example Nelson et al., 2014). Different to our expectations, we found very little evidence for mean-level change in life goals and only few differences between parents and nonparents.

In summary, we found little evidence for life goal change in response to the transition to parenthood. The lack of socialization effects associated with parenthood is consistent with research on other individual difference variables, such as the Big Five (Galdiolo & Roskam, 2014Jokela et al., 2011van Scheppingen et al., 2016; but see also Asselmann & Specht, 2020). Overall, life goals and other psychological variables appear to predict who will select into parenthood but do not seem to change in response to the experience of this life transition.

An important question is when the observed differences between parents and nonparents emerge. For example, parents-to-be may undergo changes in life goals long before their decision of having a child (see Bass, 2015) or during pregnancy. Salmela-Aro et al. (2000) found some evidence to support the hypothesis that parents’ experience changes in life goals immediately before the birth of their child, at least with regard to mothers’ achievement strivings. While the amount of achievement goals declined from the 12th to the 36th week of pregnancy in this study, it was stable from the 36th week to 3 months after birth. In the present study, life goals were only assessed once before child birth, thus we could not quantify the timing of change.

Gender differences

We hypothesized that parenthood would have a more profound influence on mothers’ than fathers’ goal structures, as mothers experience generally more physical, emotional, and psychological changes and often assume the role of the primary caregiver (Poudevigne & O’Connor, 2006Ruppanner et al., 2019Salmela-Aro et al., 2000). Even though we found only few effects, mothers tended to differ more in life goals from nonmothers, than fathers did from nonfathers. In particular, we found several selection effects in women’s agentic life goals but none in men’s. This might be explained by anticipation effects. That is, Bass (2015) found that women but not men tend to constrain their career aspirations in anticipation of potential future parenthood. She suggested that socially constructed gender expectations may be a driving force leading to more mental examination of possible role conflicts, time and financial constraints occurring with parenthood, which may ultimately lead to lower scores in agency related goals in becoming mothers. Gender differences may also be explained by selection, based on more stable individual differences in goals, instead of anticipation. For men who are high on agentic goals (in the Netherlands), it might not make a big difference for their career if they have children or not, as they just keep working. For women it does make a difference, so women high on agentic goals may be more likely to postpone childbirth or not have children at all.

Limitations and future directions

The strengths of this pre-registered study include the use of a prospective longitudinal design including parents and nonparents which allowed us to examine stability and change in life goals during the transition to parenthood. Nevertheless, there are several limitations that should be considered. First, even though the total sample consisted of more than 500 participants, the sample size within the groups of mothers, fathers, nonmothers, and nonfathers was only modest by contemporary standards resulting in limited statistical power. Second, studies with more and earlier assessments leading up to the decision of having a baby could provide important insights into potential anticipation effects prior and during pregnancy. With our data, we were not able to detect such potential early changes. Third, we found attrition effects for power indicating that participants who dropped out scored higher in this domain compared to participants who remained in the study. Moreover, the latent change score models for power did not fit the data well suggesting that the results for this goal domain should be interpreted with caution. Fourth, parents were on average about four years older than nonparents. These limitations emphasize the need for replication of our results in future research. Beyond that it would be interesting to not only look at goal importance but also into the effort people tend to put into reaching their goals. The interplay of goal importance and goal effort could help to further understand the development of life goals (see Atherton et al., 2020 for a similar reasoning).

Tuesday, October 5, 2021

Christianization with social mobility but without economic development: Evidence from missions in Ghana

Christianization without economic development: Evidence from missions in Ghana. Remi Jedwab, Felix Meier zu Selhausen, Alexander Moradic. Journal of Economic Behavior & Organization, Volume 190, October 2021, Pages 573-596. https://doi.org/10.1016/j.jebo.2021.07.015

Abstract: One of the most powerful cultural transformations of the 20th century has been the dramatic expansion of Christianity outside of Europe. This unique historical process was facilitated by vast Christian missionary efforts. In this paper, we study the economic effects of Christian missions in Ghana. We rely on six distinct identification strategies that exploit exogenous variations in Christian missionary expansion from 1828 to 1932. We find no association between Christian missions, whether Protestant, Catholic, Presbyterian or Methodist, and local economic development, whether during contemporary or colonial times. However, some results suggest that Christian missions might have had a positive effect on human capital formation. There might thus be contexts in which missions promoted human capital accumulation without this necessarily translating into local economic development.

Keywords: Economics of religionReligious diffusionPath dependenceLong-term economic developmentChristian missionsChristianityAfrica

7. Concluding remarks

One century of Christianization has transformed Ghana’s religious landscape. In 2017, about 80% of the Ghanaian population were Christians. Conversion came at the expense of traditional religious beliefs. In this paper, we established that spatial historical patterns of Christianity persist to the present-day. We then found a positive correlation between Christianity today and measures of economic development today, even after controlling for an extensive set of factors that might help account for endogeneity in mission placement.

Using six distinct identification strategies that exploit possibly exogenous variations (natural experiments) in Christian missionary expansion, we then did not find much evidence for a positive effect of Christianity on economic development in Ghana. These results are broadly consistent across Christian denominations (i.e. Protestantism, Catholicism, Presbyterianism, Methodism), which reinforces our main takeaways and addresses external validity concerns.

It could well be that Christians in Africa are among the most skilled and wealthiest members of society when compared to other individuals within their communities (Alesina et al., 2020Meier zu Selhausen, van Leeuwen, Weisdorf, 2018Wantchekon, Novta, Klašnja, 2015). But the fact that Christianization might have increased social mobility does not automatically generate economic activity. The private returns of being a Christian – which may include increased human capital – might have been larger than its actual social returns. Indeed, in a seminal study, Pritchett (2001) pointed out that rapidly rising educational attainment rates in post-independence Africa have failed to translate into learning and sustained economic growth at the macro level. Some aspects of Christianization might have also hampered economic development, for example by promoting social upheaval, and thus lowering interpersonal trust, in missionized communities (Okoye, 2021). Likewise, religiosity can increase religious participation at the expense of labor supply and economic production (Barro, McCleary, 2003Campante, Yanagizawa-Drott, 2015).

Sub-Saharan Africa is becoming the new global center of Christianity (Pew Research Center, 2015). Our analysis for Ghana suggests that continued Christian conversion might not necessarily promote economic development on the continent.


Positive indirect effect of masculinity stress on red meat consumption through beliefs that meat consumption can augment masculinity; attenuation of the effect when a red meat product is associated with an out-group (i.e., women)

The impact of masculinity stress on preferences and willingness-to-pay for red meat. Rhiannon MacDonnell Mesler, R. Bret Leary, William J. Montford. Appetite, October 5 2021, 105729. https://doi.org/10.1016/j.appet.2021.105729

Abstract: This work explores the effects of masculinity stress—distress arising from a perceived discrepancy with male gender norms—on red meat consumption, which has potentially substantial individual, collective, and ecological consequences. Across three studies, we demonstrate a positive indirect effect of masculinity stress on red meat consumption through beliefs that meat consumption can augment masculinity, an effect which is moderated by one's self-assessed traditional masculinity (study 1). We further demonstrate attenuation of the effect of masculinity stress on red meat preference when a red meat product is associated with an out-group (i.e., women; study 2) and show that this effect does not extend to women. In study 3, we show that the effect of masculinity stress on choice of red meat is attenuated following a masculinity affirmation. We finish with a detailed discussion of implications and directions for future research. Taken together, we provide convergent evidence that masculinity stress is associated with red meat preference, and that this preference can be discouraged by leveraging out-group reference information and masculinity affirmation. In so doing, this research provides a series of contributions to the literatures on meat eating and vegetarianism specifically, as well as gender identity maintenance more broadly.

Keywords: MasculinityMasculinity stressMeat consumptionGender identity maintenance



Clark et al. (2014) proposed a theory of motivated free will beliefs, that at least part of free will beliefs & attributions are caused by a desire to hold moral transgressors responsible; recently, this theory has been challenged

Clark, C. J., Winegard, B. M., & Shariff, A. F. (2021). Motivated free will belief: The theory, new (preregistered) studies, and three meta-analyses. Journal of Experimental Psychology: General, 150(7), e22–e47, Oct 2021. https://doi.org/10.1037/xge0000993

Abstract: Clark et al. (2014) proposed a theory of motivated free will beliefs, according to which at least part of free will beliefs and attributions are caused by a desire to hold moral transgressors responsible. Recently, this theory has been challenged. In the following article, we examine the evidence and conclude that, although not dispositive, much of the evidence seems to support the motivated account. For example, in 14 new (seven preregistered) studies (n = 4,014), results consistently supported the motivated theory; and these findings consistently replicated in studies (k = 8) that tested an alternative (counternormative) hypothesis. In addition, three meta-analyses of the existing data (including eight vignette types and eight free will judgment types) found support for motivated free will attributions (k = 22; n = 7,619; r = .25, p < .001) and beliefs (k = 27; n = 8,100; r = .13, p < .001), which remained robust after removing all potential confounds (k = 26; n = 7,953; r = .12, p < .001). However, the size of these effects varied by vignette type and free will belief measurement. We discuss these variations and the implications for different theories of free will beliefs and attributions. And we end by discussing the relevance of these findings for past and future research and the significance of these findings for human responsibility.


Rolf Degen summarizing... People behaved less helpfully toward a person who had laughed at a joke that was at the expense of a political peer

Are You Laughing at Them or with Them? Laughter as a Signal of In-Group Affiliation. Lawrence Ian Reed & Evelyn Castro. Journal of Nonverbal Behavior, Oct 5 2021. https://rd.springer.com/article/10.1007/s10919-021-00384-0

Abstract: Despite the wide range of theoretical explanations for human laughter, it is generally agreed to function, at least in part, as a social signal. We tested the hypothesis that laughter serves as a signal of group affiliation. Participants viewed a video clip depicting a confederate partner of unknown group affiliation displaying either a neutral expression, a smile, or laughter in response to a joke told at the expense of a member of the in-group or the out-group. Participants then decided whether to help the confederate in a fictional and incentivized economic game. When viewed in response to a joke told at the expense of the in-group member, participants were less likely to help after viewing the laughter clip in comparison to the neutral and smiling clips. However, when viewed in response to a joke told at the expense of the out-group member, participants were more likely to help after viewing the smiling clip in comparison to the neutral and laughter clips. Taken together, these findings suggest that laughter may serve to signal affiliation, albeit only among out-group members.


Most high-income earners support progressive taxation when they identify themselves with a lower group; additionally, individuals who overestimate the earnings of the rich are more likely to support progressive taxation

Who Is High Income, Anyway? Social Comparison, Subjective Group Identification, and Preferences over Progressive Taxation. Asli Cansunar. The Journal of PoliticsVolume 83, Number 4, Oct 2021. https://www.journals.uchicago.edu/doi/abs/10.1086/711627

Abstract: Why are high-income and low-income earners not significantly polarized in their support for progressive income taxation? This article posits that the affluent fail to recognize that they belong to the high-income income group and this misperception affects their preferences over progressive taxation. To explain this mechanism theoretically, I introduce a formal model of subjective income-group identification through self-comparison to an endogenous reference group. In making decisions about optimal tax rates, individuals then use these subjective evaluations of their own income group and earnings of other groups. Relying on ISSP data, I find strong evidence for the model’s empirical implications: most high-income earners support progressive taxation when they identify themselves with a lower group. Additionally, individuals who overestimate the earnings of the rich are more likely to support progressive taxation.


Monday, October 4, 2021

People-Centered Intelligences Are Psychometrically Distinct from Thing-Centered Intelligences

Are People-Centered Intelligences Psychometrically Distinct from Thing-Centered Intelligences? A Meta-Analysis. Victoria M. Bryan and John D. Mayer. Journal of Intelligence 9: 48, Sep 30 2021. https://doi.org/10.3390/jintelligence9040048

Abstract: The Cattell–Horn–Carroll (CHC) or three-stratum model of intelligence envisions human intelligence as a hierarchy. General intelligence (g) is situated at the top, under which are a group of broad intelligences such as verbal, visuospatial processing, and quantitative knowledge that pertain to more specific areas of reasoning. Some broad intelligences are people-centered, including personal, emotional, and social intelligences; others concern reasoning about things more generally, such as visuospatial and quantitative knowledge. In the present research, we conducted a metaanalysis of 87 studies, including 2322 effect sizes, to examine the average correlation between people-to-people intelligences relative to the average correlation between people-to-thing-centered intelligences (and similar comparisons). Results clearly support the psychometric distinction between people-centered and thing-centered mental abilities. Coupled with evidence for incremental predictions from people-centered intelligences, our findings provide a secure foundation for continued research focused on people-centered mental abilities.

Keywords: people-centered intelligences; broad intelligences; meta-analysis; socio-emotional abilities





Monkey Plays Pac-Man with Compositional Strategies and Hierarchical Decision-making

Monkey Plays Pac-Man with Compositional Strategies and Hierarchical Decision-making. Qianli Yang, Zhongqiao Lin, Wenyi Zhang, Jianshu Li, Xiyuan Chen, Jiaqi Zhang, Tianming Yang. bioRxiv Oct 4 2021. https://doi.org/10.1101/2021.10.02.462713

Abstract: Humans can often handle daunting tasks with ease by developing a set of strategies to reduce decision making into simpler problems. The ability to use heuristic strategies demands an advanced level of intelligence and has not been demonstrated in animals. Here, we trained macaque monkeys to play the classic video game Pac-Man. The monkeys' decision-making may be described with a strategy-based hierarchical decision-making model with over 90% accuracy. The model reveals that the monkeys adopted the take-the-best heuristic by using one dominating strategy for their decision-making at a time and formed compound strategies by assembling the basis strategies to handle particular game situations. With the model, the computationally complex but fully quantifiable Pac-Man behavior paradigm provides a new approach to understanding animals' advanced cognition.


Men reported more likelihood of transmitting negative gossip than women, contrary to widespread perception that women are more indirectly aggressive; among adults, indirect aggression decreases with age, perhaps because older individuals have less need to compete for resources

Competitive gossip: the impact of domain, resource value, resource scarcity and coalitions. Nicole H. Hess and Edward H. Hagen. Royal Society Open Science, Volume 376, Issue 1838, October 4 2021. https://doi.org/10.1098/rstb.2020.0305

Abstract: Those with better reputations often obtain more resources than those with poorer reputations. Consequently, gossip might be an evolved strategy to compete for valuable and scarce material and social resources. Influenced by models of non-human primate competition, we test the hypotheses that gossip: (i) targets aspects of reputation relevant to the domain in which the competition is occurring, (ii) increases when contested resources are more valuable, and (iii) increases when resources are scarcer. We then test hypotheses derived from informational warfare theory, which proposes that coalitions strategically collect, analyse and disseminate gossip. Specifically, we test whether: (iv) coalitions deter negative gossip, and (v) whether they increase expectations of reputational harm to competitors. Using experimental methods in a Mechanical Turk sample (n = 600), and survey and ego network analysis methods in a sample of California sorority women (n = 74), we found that gossip content is specific to the context of the competition; that more valuable and scarcer resources cause gossip, particularly negative gossip, to intensify; and that allies deter negative gossip and increase expectations of reputational harm to an adversary. These results support social competition theories of gossip.


How People Become Attractive to Prospective Mates: Strategies of Self-Promotion in the Greek Cultural Context

How People Become Attractive to Prospective Mates: Strategies of Self-Promotion in the Greek Cultural Context. Menelaos Apostolou, Yan Wang, Athina Gavriilidou. Evolutionary Psychology, October 4, 2021. https://doi.org/10.1177/14747049211045271

Abstract: An important aspect of human mating is to appeal to prospective mates. Accordingly, the current research attempted to identify the strategies that people use in order to become more attractive as prospective intimate partners. More specifically, using open-ended questionnaires in a sample of 326 Greek-speaking participants, we identified 87 acts that people performed in order to become more attractive as mates. By using quantitative research methods in a sample of 2,197 Greek-speaking participants, we classified these acts into 16 different strategies. We found that, enhancing one's looks and becoming more pleasant, were among the most preferred strategies. Women were more likely than men to adopt strategies that involved looks, while men were more likely than women to adopt strategies that involved resource acquisition capacity. Moreover, age effects were found for most strategies. The identified strategies were classified into two broader domains, one aiming to develop and demonstrate fitness-increasing qualities, and the other to deceive about fitness-impairing traits.

Keywords: self-promotion strategies, mating strategies, mating, attraction

By using a combination of qualitative research methods, we identified 87 acts that people were likely to perform in order to become more attractive as mates. Using quantitative research methods, we classified these acts in 16 different strategies. Among the most likely to be used ones, were to enhance one's looks and to become more pleasant. Women were more likely than men to adopt strategies which involved looks, while men were more likely than women to adopt strategies which involved demonstrating resource acquisition capacity. Moreover, age effects were found for most strategies. The identified strategies were classified into two broader domains, one aiming to develop and demonstrate fitness-increasing qualities, and the other to deceive about fitness-impairing traits.

As it was originally predicted, factors which indicated desirable character traits emerged, namely “Become more pleasant” and “Self-improvement.” About 80% of the participants indicated that they would try to look more pleasant, and about 57% that they would try to improve themselves, especially their character. Research on mate preferences indicates that, being kind and understanding, are highly valued in prospective partners (Buss, 2016); thus, we expected that a factor reflecting people's effort to appear more kind would emerge, but this was not the case. One possible explanation is that such effort was captured in other strategies. In particular, people indicated that they would do volunteer work, which classified under the “Increase intellectual capacity” factor. Furthermore, people who score low in kindness may try to keep it hidden (see O'Sullivan, 2008), which is captured by the “Keep undesirable traits hidden” factor. Future research could extend the current study by asking people to rate specifically if, in order to become more attractive to prospective mates, they would attempt to demonstrate kindness and understanding.

Moving on, also consistent with our original prediction, factors that reflected resource provision capacity emerged, namely “Increase social status,” “Spend money on someone I am interested in,” and “Showing off and exaggerating wealth.” Resource provision capacity was also captured in the “Increase intellectual capacity” and the “Show off abilities and talents” strategies, as intelligence, talents, and abilities predict this capacity. People indicated an increased willingness to use these strategies; for instance, about 54% of the participants indicated that they would be likely to demonstrate their abilities and talents, and more than half of the participants indicated that they would spend money on someone they were interested in. Yet, the “Showing off and exaggerating wealth” was not a preferred strategy, as only 5% of the participants indicated that they would use it.

In accordance to our original prediction, strategies emerged that relate to good looks, namely “Enhance looks,” “Lose weight,” “Drastic appearance changes,” and “Enhance social media profile.” The “Enhance looks” strategy was the most preferred one, with more than 84% of the participants indicating that they were likely to adopt it. Similarly, in order to become more attractive as mates, nearly 55% of the participants indicated that they would try to lose weight, and more than one in five that they would enhance their social media profile. These findings suggest that, in order to become more attractive as partners, people predominantly resorted to strategies aimed to enhance their looks. This conclusion is not surprising, given that looks summarize information about traits with high fitness value, including health, genetic quality and reproductive capacity. In addition, looks, as opposed to other traits, such as resource provision capacity, can be assessed in a few seconds, so in screening for desirable mates, it would be efficient for mate-seekers to start from looks, and if these satisfy them, to proceed in assessing other traits. This being the case, it would not be effective if people paid attention to demonstrating other qualities ignoring their looks, because prospective mates would not bother to assess them if looks did not appeal to them.

As we originally predicted, the “Develop similar interests” strategy, where people become more attractive to prospective mates by showing them that they are similar to them, emerged. Here, individuals would adopt hobbies and habits of prospective partners, they would show agreement with them, and they would show interest in what interests them. This strategy seems to involve deception, as people would engage for instance, in specific activities in order to be liked by prospective partners, and not necessarily because they were genuinely interested in such activities. Yet, this strategy did not classify under the deception domain, suggesting that people were genuinely interested in becoming more similar to prospective partners, and not to deceive them that they were similar. This strategy was also popular, with more than 40% of the participants indicating a willingness to use it.

We did not predict the emergence of the “Do more risky, physically demanding and unusual things” strategy. One interpretation of this strategy is that, it enables people to signal their capacities in a reliable manner. For instance, only people who have good physical capacities would risk doing physically demanding things. Thus, such actions may reliably signal to prospective mates that individuals have good physical qualities (see Zahavi and Zahavi, 1997Miller, 2000).

Consistent with our original prediction, the extracted strategies classified into two broader domains, namely a domain where people would attempt to develop and demonstrate desirable qualities, and another domain where they would deceive about undesirable traits. Thus, in the former domain, people would attempt to increase and demonstrate their resources generating capacity by receiving more education, getting a job promotion and spending money on a prospective partner, while in the second domain, they would attempt to exaggerate their wealth and present their financial situation better than it actually is. Similarly, in the former domain people would attempt to improve their character and they would demonstrate that they have good personality traits, such as pleasantness, while in the second domain they would attempt to hide character and behavioral flaws, such as a psychological problem. In the former domain, people would enhance their appearance by looking after their body, improve their clothing and losing some weight, while in the second domain, they would deceive about their physical qualities by drastically altering their body through artificial means, such as a plastic surgery and liposuction.

Men value looks in an intimate partner more than women (Buss et al., 2001Thomas et al., 2020). Accordingly, women were more willing than men to use strategies for enhancing their looks. In particular, they indicated a higher willingness to improve their appearance by looking after their skin, hair, by wearing clothes that flattered them and by losing weight. On the other hand, women value resource acquisition potential in a prospective partner more than men (Buss, 2016Thomas et al., 2020). Accordingly, men were more likely to attempt to develop and demonstrate resource acquisition capacity, by buying gifts for someone they were interested in, and by increasing their social status. They gave also higher mean scores in showing off abilities and talents, and in demonstrating and exaggerating wealth; these differences approached but did not pass however the significance level. Previous research has also identified similar sex differences (Schmitt & Buss, 1996). The current research, by identifying the structure of self-promotion strategies, has more accurately identified the strategies in which the sexes diverge or converge. Moreover, the significance and the magnitude of these differences is contingent to the cultural context of the study (Bendixen & Kennair, 2015). Thus, future research could employ the identified factor structure, in order to examine how sex differences vary across different cultural contexts.

Age predicted most strategies. As indicated by the effect size, the largest effect was over the “Enhance looks” strategy, with younger participants indicating a higher willingness to use it than older ones. One possible explanation is that, as people get older, their looks deteriorate, so this is not their strongest selling point in the mating market; accordingly, they divert their limited resources in displaying other qualities, which have a positive association with age. Consistent with this interpretation, we found that older participants indicated a stronger willingness to show off wealth and social status. We also found that, younger participants were more willing to attempt to enhance their social media profile than older participants. One explanation is that, older generations may be less familiar with social media, and less likely to use them than younger generations (see Correa et al., 2010). In addition, older participants indicated that they were more likely to attempt to lose some weight in order to become more attractive to prospective mates. One reason is that, as people get older, metabolism changes and it is easier to get extra weight (Pontzer et al., 2021), which turns losing weight a strategy more likely to be used by older participants.

In most cases, sexual orientation did not predict the use of the identified strategies, suggesting that individuals of different orientations employ similar strategies in order to become more attractive as mates. However, our results need to be considered preliminary, because although our sample was large, it was not large enough to include many participants in all sexual orientation categories. Accordingly, the lack of significant effects may partially be due to our study not having sufficient power. Moving on, we asked participants to indicate their willingness to use self-promotion strategies assuming that they were single. We aimed to assess the general willingness to use such strategies; thus, if we did not do so, most participants who were in a relationship or married would indicate a low willingness to use self-promotion strategies, as they had already secured a mate. Consequently, the way the study was designed, explains why marital status did not emerge as a statistically significant predictor of self-promotion mating strategies.

Our research was designed to advance earlier work on self-promotion strategies, so it would be fruitful to compare our findings with past findings. More specifically, Schmitt and Buss (1996) came up with 31 such strategies, while our study extracted almost half this number. This difference is due to our use of dimension reduction techniques, which can provide a more accurate identification of the underlying factor structure. Furthermore, these techniques revealed an even broader two-domain structure. In addition, there were considerable similarities in the strategies identified by Schmitt and Buss (1996) and the ones we identified here, which were consistent with the evolutionary theoretical framework. Yet, there were also differences. One such difference was that Schmitt and Buss (1996) found several strategies including “Act Kind,” “Act Sensitive,” and “Act Helpful,” which demonstrate personality traits, such as kindness and understanding, but such strategies did not emerge here. One possible explanation is that this difference reflects a cultural difference. Another explanation is that Schmitt and Buss (1996) study investigated the acts that people do in order to become more attractive along with the acts that people do in order to attract prospective mates. The two are very similar but not completely overlapping. This difference can also explain why the strategies “Invoke Love,” “Make Proposition,” “Use Alcohol,” “Have Sex,” “Become Friends,” “Communicate Often,” and “Display Sexual Exclusivity” identified by Schmitt and Buss (1996) did not emerge here.

Furthermore, the “Enhance social media profile” strategy did not emerge in Schmitt and Buss (1996), as social media such as the Facebook, did not exist at that time. Similarly, the “Develop similar interests,” “Self-improvement,” and the “Keep undesirable traits hidden” did not emerge in Schmitt and Buss (1996) study. One possibility is that the current study employed a larger and more diverse sample than the Schmitt and Buss (1996) study, which means that the latter may have missed the acts that give rise to these factors. It could also be the case that these acts were identified, but these factors did not emerge because dimension reduction techniques were not used.

Environmental factors may affect the identified self-promotion strategies. For instance, the “Enhance social media profile” strategy would be less likely to be used in a cultural context where social media use is not widespread, than in a cultural context where most people have a social media profile. In addition, in pre-industrial societies parents have a considerable influence in determining their children's spouses, through the institution of arranged marriage (Apostolou, 20072010). Thus, in these societies, people would direct their self-promotion strategies toward parents, adjusting them to become more attractive as prospective in-laws. Furthermore, environmental factors may affect the fitness-contributions of specific traits. For instance, the resource provision capacity of a prospective partner would be more fitness-increasing in a context where resources are scarce and the social support system is limited, than in a context where resources are more abundant and the social support system is highly developed. This being the case, people would be more likely to employ strategies that demonstrate their resource provision capacity in the former than in the latter context. Accordingly, we expect considerable cross-cultural variation in the self-promotion strategies, mandating future cross-cultural research in the area.

One limitation of the current work is that it employed self-report instruments, so there was no way for us to confirm the honesty of participants’ answers. Moreover, our research was based on non-probability samples, so its findings do not readily generalize to the population. Also, in order to take the survey, the respondent should had access to a computer or a smartphone. By recruiting over social media, there is the possibility that individuals of lower socio-economic status who may not have access to devices to use social media, were underrepresented. It is also possible that, those who were more involved in social media and therefore, were more likely to see the survey, differed from the general population with respect to self-promotion strategies. Furthermore, it appears that single people were overrepresented in our sample. One possible explanation is that, single people have a stronger motivation to attract partners, so they may be more interested in the topic of the study.

Moving on, in Study 1, participants were asked to indicate not only the acts that they had performed in the past, but also the acts that were likely to use in the future. We did so in order to construct a more inclusive list of acts that people would perform; however, by asking respondents to predict future actions, our list may have included acts that would rarely or never be employed. Moreover, participants responded hypothetically, so in actual situations, they may use different strategies than the ones they have indicated here. Furthermore, people may use different strategies for becoming attractive to casual and different strategies for becoming attractive to long-term mates (Schmitt & Buss, 1996); yet, in the current study, we did not distinguish between the two. In addition, in the current study we did not examine the effectiveness of the identified strategies, something that future studies need to do. In addition, there are several factors, such as personality, that predict the adoption of such strategies, which were not examined in the present study. Furthermore, the current research was confined to the Greek cultural context, and its findings may not readily apply to other cultural settings.

An important aspect of mating is to appeal to prospective mates. In the present study, we have identified a plethora of acts that people use in order to become more attractive as mates, and we have classified them in broader strategies. Nevertheless, in the light of the limitations of the current research, and the complexity of the phenomenon, much more work is required if self-promotion strategies are to be understood.