AP Investigation: Hospital patients held hostage for cash. MARIA CHENG. AP, October 25, 2018. https://apnews.com/daf47512c8f74e869b722782299b4a0e
NAIROBI, Kenya (AP) — The Kenyatta National Hospital is east Africa’s biggest medical institution, home to more than a dozen donor-funded projects with international partners — a “Center of Excellence,” says the U.S. Centers for Disease Control and Prevention.
The hospital’s website proudly proclaims its motto — “We Listen ... We Care” — along with photos of smiling doctors, a vaccination campaign and staffers holding aloft a gold trophy at an awards ceremony.
But there are no pictures of Robert Wanyonyi, shot and paralyzed in a robbery more than a year ago. Kenyatta will not allow him to leave the hospital because he cannot pay his bill of nearly 4 million Kenyan shillings ($39,570). He is trapped in his fourth-floor bed, unable to go to India, where he believes doctors might help him.
At Kenyatta National Hospital and at an astonishing number of other hospitals around the world, if you don’t pay up, you don’t go home.
The hospitals often illegally detain patients long after they should be medically discharged, using armed guards, locked doors and even chains to hold those who have not settled their accounts. Mothers and babies are sometimes separated. Even death does not guarantee release: Kenyan hospitals and morgues are holding hundreds of bodies until families can pay their loved ones’ bills, government officials say.
Dozens of doctors, nurses, health experts, patients and administrators told The Associated Press of imprisonments in hospitals in at least 30 other countries, including Nigeria and the Democratic Republic of the Congo, China and Thailand, Lithuania and Bulgaria, and others in Latin America and the Middle East.
The AP investigation built on a report last year by the British think-tank Chatham House; its experts found more than 60 press reports of patient detention in 14 countries in Asia and sub-Saharan Africa.
“What’s striking about this issue is that the more we look for this, the more we find it,” said Dr. Ashish Jha, director of the Harvard Global Health Institute, who was not involved in the British research. “It’s probably hundreds of thousands if not millions of people that this affects worldwide. It is not something that is only happening in a small number of countries, but the problem is that nobody is looking at this and it is way off the public health radar.”
Some examples:
—In the Philippines, Annalyn Manalo was held at Mount Carmel Diocesan General Hospital in Lucena City for 1½ months starting last December following treatment for heart problems. Administrators refused initially to allow her family to pay in installments — and the cost of each extra day in detention was added to the bill.
“We were treated like criminals,” said Manalo’s husband, Sigfredo. “The security guards would come and check on us all the time.”
—In Congo’s second city of Lubumbashi, the AP visited more than 20 hospitals and clinics and found that all but one routinely detained patients who failed to pay, even though the practice is illegal there.
—In Bangalore, India, Emmanuel Malagi was detained in a private hospital for three months after he was treated for a spinal tumor, according to his brother, Christanand. Prevented from seeing him, his family scrambled unsuccessfully to pay his nearly 1.4 lakh rupees ($19,281) bill — and when he died, the hospital demanded another 10 lakh ($13,771) to release the body.
—In Malaysia, a medical student from the Netherlands on a diving trip got the bends. He couldn’t afford his decompression treatment; the hospital locked him in a room for four days, with no food or drink, until he was able to get the money, according to Saskia Mostert, a Dutch academic who has researched hospital detentions.
—In Bolivia, a government ombudsman reported that 49 patients were detained in hospitals or clinics in the last two years because they couldn’t pay, despite a law that prohibits the practice.
During several August visits to Kenyatta National Hospital, The Associated Press witnessed armed guards in military fatigues standing watch over patients, and saw where detainees slept on bedsheets on the floor in cordoned-off rooms. Guards prevented one worried father from seeing his detained toddler. All despite a court ruling years ago that found the detentions were illegal.
Health experts decry hospital imprisonment as a human rights violation. Yet the United Nations, U.S. and international health agencies, donors and charities all have remained silent while pumping billions of dollars into these countries to support splintered health systems or to fight outbreaks of diseases including AIDS and malaria.
“It’s the dirty underbelly of global health that nobody wants to talk about,” said Sophie Harman, a health academic at Queen Mary University of London.
“People know patients are being held prisoner, but they probably think they have bigger battles in public health to fight, so they just have to let this go.”
[...]
Where patients are imprisoned, hospitals acknowledge it is not necessarily profitable. But many say it often leads at least to partial payment and serves as a deterrent.
Unlike many hospitals in developed countries, African hospitals don’t always provide food, clothing or bedding for patients, so holding onto them does not necessarily incur a significant cost. Detained patients typically rely on relatives to bring them food while those without obliging family members resort to begging for help from staff or other patients.
Dr. Festus Njuguna, a pediatric oncologist at the Moi Teaching and Referral Hospital in Eldoret, about 300 kilometers northwest of Nairobi, said the institution regularly holds children with cancer who have finished their treatment, but whose parents cannot pay. The children are typically left on the wards for weeks and months at a time, long after their treatment has ended.
“It’s not a very good feeling for the doctors and nurses who have treated these patients, to see them kept like this,” Njuguna said.
Still, some officials openly defend the practice.
“We can’t just let people leave if they don’t pay,” said Leedy Nyembo-Mugalu administrator of Congo’s Katuba Reference Hospital. He said holding patients wasn’t an issue of human rights, but simply a way to conduct business: “No one ever comes back to pay their bill a month or two later.”
At many Kenyan hospitals, including Kenyatta, officials armed with rifles patrol the hallways and guard the hospital’s gates. Patients must show hospital guards a discharge form to prove they’re allowed to leave and even visitors must sometimes surrender their identification cards before seeing patients.
[...]
“This is something that hospital authorities have been trying to keep under wraps,” said George Morara, vice chairperson of the country’s national commission on human rights. He said the number of Kenyans imprisoned in hospitals is “disturbingly high” and that the practice is “ubiquitous in public and private hospitals.”
He said patients have been held at Kenyatta for up to two years, and it was reasonable to suspect that hundreds of patients could be detained there at any time.
Kenya’s ministry of health and Kenyatta canceled several scheduled interviews with the AP and declined to respond to repeated requests for comment.
[...]
Although the court instructed the government to produce guidelines on how hospitals should waive fees for patients unable to pay, Opondo said the proposed fixes have not gone far enough. A program that provides free maternity care is only available at a select number of private hospitals and does not include post-delivery care.
Earlier this month, Kenya’s High Court ruled again that imprisoning patients “is not one of the acceptable avenues (for hospitals) to recover debt.” The case involved a man detained at Nairobi Women’s Hospital since June 25; the judge ordered his immediate release despite the outstanding bill. Kenyan politicians also will soon debate a proposed amendment to the country’s health law that will explicitly make patient detentions illegal.
The latest amendment was submitted by MP Jared Okelo, a member of Parliament who described the imprisonment of mothers as “rampant.”
Omuya is still scarred by her detention at Pumwani. She says she developed chronic pneumonia after being held in the damp, cold conditions there and has not been able to work full-time since.
Neither Omuya nor Oliele have been paid the damages awarded to them by the court: Omuya was to receive 1,500,000 shillings ($14,842) from the hospital while Oliele was to receive 500,000 shillings ($4,948).
[...]
___
Desmond Tiro in Nairobi and Paola Flores in La Paz, Bolivia contributed to this report.
Sunday, October 28, 2018
Paraventricular thalamic neurons represent multiple salient features of sensory stimuli, like reward, aversiveness, novelty, & surprise; the nucleus thus provides context-dependent salience encoding
Dynamic salience processing in paraventricular thalamus gates associative learning. Yingjie Zhu, Gregory Nachtrab, Piper C. Keyes, William E. Allen, Liqun Luo, Xiaoke Chen. Science , Vol. 362, Issue 6413, pp. 423-429. DOI: 10.1126/science.aat0481
Abstract: The salience of behaviorally relevant stimuli is dynamic and influenced by internal state and external environment. Monitoring such changes is critical for effective learning and flexible behavior, but the neuronal substrate for tracking the dynamics of stimulus salience is obscure. We found that neurons in the paraventricular thalamus (PVT) are robustly activated by a variety of behaviorally relevant events, including novel (“unfamiliar”) stimuli, reinforcing stimuli and their predicting cues, as well as omission of the expected reward. PVT responses are scaled with stimulus intensity and modulated by changes in homeostatic state or behavioral context. Inhibition of the PVT responses suppresses appetitive or aversive associative learning and reward extinction. Our findings demonstrate that the PVT gates associative learning by providing a dynamic representation of stimulus salience.
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A close view of the paraventricular thalamus
The paraventricular thalamus is a relay station connecting brainstem and hypothalamic signals that represent internal states with the limbic forebrain that performs associative functions in emotional contexts. Zhu et al. found that paraventricular thalamic neurons represent multiple salient features of sensory stimuli, including reward, aversiveness, novelty, and surprise. The nucleus thus provides context-dependent salience encoding. The thalamus gates sensory information and contributes to the sleep-wake cycle through its interactions with the cerebral cortex. Ren et al. recorded from neurons in the paraventricular thalamus and observed that both population and single-neuron activity were tightly coupled with wakefulness.
Abstract: The salience of behaviorally relevant stimuli is dynamic and influenced by internal state and external environment. Monitoring such changes is critical for effective learning and flexible behavior, but the neuronal substrate for tracking the dynamics of stimulus salience is obscure. We found that neurons in the paraventricular thalamus (PVT) are robustly activated by a variety of behaviorally relevant events, including novel (“unfamiliar”) stimuli, reinforcing stimuli and their predicting cues, as well as omission of the expected reward. PVT responses are scaled with stimulus intensity and modulated by changes in homeostatic state or behavioral context. Inhibition of the PVT responses suppresses appetitive or aversive associative learning and reward extinction. Our findings demonstrate that the PVT gates associative learning by providing a dynamic representation of stimulus salience.
---
A close view of the paraventricular thalamus
The paraventricular thalamus is a relay station connecting brainstem and hypothalamic signals that represent internal states with the limbic forebrain that performs associative functions in emotional contexts. Zhu et al. found that paraventricular thalamic neurons represent multiple salient features of sensory stimuli, including reward, aversiveness, novelty, and surprise. The nucleus thus provides context-dependent salience encoding. The thalamus gates sensory information and contributes to the sleep-wake cycle through its interactions with the cerebral cortex. Ren et al. recorded from neurons in the paraventricular thalamus and observed that both population and single-neuron activity were tightly coupled with wakefulness.
Stereotypes about wealthy people’s personality are accurate albeit somewhat exaggerated; wealthy people can be characterized as stable, flexible, & agentic individuals who are focused more on themselves than on others
Leckelt, Marius, David Richter, Carsten Schröder, Albrecht C. P. Küfner, Markus M. Grabka, and Mitja Back. 2018. “The Rich Are Different: Unraveling the Perceived and Self-reported Personality Profiles of High Net-worth Individuals.” PsyArXiv. October 28. doi:10.1111/bjop.12360
Abstract: Beyond money and possessions, how are the rich different from the general population? Drawing on a unique sample of high net-worth individuals from Germany (≥1 million Euro in financial assets; N = 130), nationally representative data (N = 22,981), and an additional online panel (N = 690), we provide the first direct investigation of the stereotypically-perceived and self-reported personality profiles of high net-worth individuals. Investigating the broad personality traits of the Big Five and the more specific traits of narcissism and locus of control, we find that stereotypes about wealthy people’s personality are accurate albeit somewhat exaggerated and that wealthy people can be characterized as stable, flexible, and agentic individuals who are focused more on themselves than on others.
Abstract: Beyond money and possessions, how are the rich different from the general population? Drawing on a unique sample of high net-worth individuals from Germany (≥1 million Euro in financial assets; N = 130), nationally representative data (N = 22,981), and an additional online panel (N = 690), we provide the first direct investigation of the stereotypically-perceived and self-reported personality profiles of high net-worth individuals. Investigating the broad personality traits of the Big Five and the more specific traits of narcissism and locus of control, we find that stereotypes about wealthy people’s personality are accurate albeit somewhat exaggerated and that wealthy people can be characterized as stable, flexible, and agentic individuals who are focused more on themselves than on others.
Researchers at Brown U found that alcohol hijacks a conserved memory pathway in the brain and changes which versions of genes are made, forming the cravings that fuel addiction
Alcohol Activates Scabrous-Notch to Influence Associated Memories. Emily Petruccelli et al. Neuron, October 25, 2018. https://doi.org/10.1016/j.neuron.2018.10.005
Highlights
• Alcohol cue preference requires Scabrous-Notch interaction in mushroom body neurons
• Alcohol activates Notch and Su(H) target gene expression in the adult brain
• Dopamine 2 receptor splicing and targeting by Su(H) are altered by alcohol exposure
• Alcohol cue preference affects mushroom body gene expression and splicing
Summary: Drugs of abuse, like alcohol, modulate gene expression in reward circuits and consequently alter behavior. However, the in vivo cellular mechanisms through which alcohol induces lasting transcriptional changes are unclear. We show that Drosophila Notch/Su(H) signaling and the secreted fibrinogen-related protein Scabrous in mushroom body (MB) memory circuitry are important for the enduring preference of cues associated with alcohol’s rewarding properties. Alcohol exposure affects Notch responsivity in the adult MB and alters Su(H) targeting at the dopamine-2-like receptor ( Dop2R). Alcohol cue training also caused lasting changes to the MB nuclear transcriptome, including changes in the alternative splicing of Dop2R and newly implicated transcripts like Stat92E. Together, our data suggest that alcohol-induced activation of the highly conserved Notch pathway and accompanying transcriptional responses in memory circuitry contribute to addiction. Ultimately, this provides mechanistic insight into the etiology and pathophysiology of alcohol use disorder.
Press release: http://news.brown.edu/articles/2018/10/alcohol
Highlights
• Alcohol cue preference requires Scabrous-Notch interaction in mushroom body neurons
• Alcohol activates Notch and Su(H) target gene expression in the adult brain
• Dopamine 2 receptor splicing and targeting by Su(H) are altered by alcohol exposure
• Alcohol cue preference affects mushroom body gene expression and splicing
Summary: Drugs of abuse, like alcohol, modulate gene expression in reward circuits and consequently alter behavior. However, the in vivo cellular mechanisms through which alcohol induces lasting transcriptional changes are unclear. We show that Drosophila Notch/Su(H) signaling and the secreted fibrinogen-related protein Scabrous in mushroom body (MB) memory circuitry are important for the enduring preference of cues associated with alcohol’s rewarding properties. Alcohol exposure affects Notch responsivity in the adult MB and alters Su(H) targeting at the dopamine-2-like receptor ( Dop2R). Alcohol cue training also caused lasting changes to the MB nuclear transcriptome, including changes in the alternative splicing of Dop2R and newly implicated transcripts like Stat92E. Together, our data suggest that alcohol-induced activation of the highly conserved Notch pathway and accompanying transcriptional responses in memory circuitry contribute to addiction. Ultimately, this provides mechanistic insight into the etiology and pathophysiology of alcohol use disorder.
Press release: http://news.brown.edu/articles/2018/10/alcohol
Literature said property crimes have more instrumental motives, require planning, & hence are particularly sensitive to permanent changes in cost & benefits, but violent crime declines in U.S. cities on days in which the local pollen count is unusually high
Chalfin, Aaron and Danagoulian, Shooshan and Deza, Monica, More Sneezing, Less Crime? Seasonal Allergies, Transitory Costs and the Market for Offenses (August 18, 2018). http://dx.doi.org/10.2139/ssrn.3234415
Abstract: The neoclassical economic model of crime envisions crime as a gamble undertaken by a rational individual who is weighing the costs and benefits of offending at the margin. A large literature estimates the sensitivity of crime to policy inputs that shift the cost of offending such as police and prisons. In this paper, we point out that participants in the market for offenses also respond to transitory changes in situational factors and that these are in constant flux. We consider the responsiveness of crime to a pervasive and common health shock which we argue shifts costs and benefits for offenders and victims: seasonal allergies. Leveraging daily variation in city-specific pollen counts, we present novel evidence that violent crime declines in U.S. cities on days in which the local pollen count is unusually high and that these effects are driven by residential violence. While past literature suggests that property crimes have more instrumental motives, require planning, and hence are particularly sensitive to permanent changes in the cost and benefits of crime, we find evidence that violence may be especially sensitive to situational factors.
Abstract: The neoclassical economic model of crime envisions crime as a gamble undertaken by a rational individual who is weighing the costs and benefits of offending at the margin. A large literature estimates the sensitivity of crime to policy inputs that shift the cost of offending such as police and prisons. In this paper, we point out that participants in the market for offenses also respond to transitory changes in situational factors and that these are in constant flux. We consider the responsiveness of crime to a pervasive and common health shock which we argue shifts costs and benefits for offenders and victims: seasonal allergies. Leveraging daily variation in city-specific pollen counts, we present novel evidence that violent crime declines in U.S. cities on days in which the local pollen count is unusually high and that these effects are driven by residential violence. While past literature suggests that property crimes have more instrumental motives, require planning, and hence are particularly sensitive to permanent changes in the cost and benefits of crime, we find evidence that violence may be especially sensitive to situational factors.
Saturday, October 27, 2018
Despite philosophical & conventional wisdom dating back to the ancients, researchers have only recently begun to uncover evidence that extreme standing on “normal” or “desirable” personality traits might be maladaptive
Extreme Personalities at Work and in Life. Nathan T. Carter, Joshua D. Miller, Thomas A. Widiger. Current Directions in Psychological Science, https://doi.org/10.1177/0963721418793134
Abstract: Contemporary personality taxonomies cast personality traits as ranging from the maladaptive (e.g., low conscientiousness) to adaptive (e.g., high conscientiousness) levels. Despite philosophical and conventional wisdom dating back to the ancients, researchers have only recently begun to uncover evidence that extreme standing on “normal” or “desirable” personality traits might be maladaptive. Here, we present an emerging perspective on why and how extreme standing on “desirable” trait continua translates into maladaptive behavior and undesirable outcomes at work and in life. An overview of the literature on the topic is presented for each trait within the five-factor model. We suggest two reasons for the lack of clarity in the empirical literature: (a) problems with statistical tests resulting from measurement error and (b) lack of breadth in the conceptualization and measurement of personality traits. We suggest that a solution to this problem is to extend trait continua to reflect maladaptive levels at both ends. We close by pointing out that a major implication of this emerging perspective indicates that many more people possess optimal personality-trait levels than previously thought and that future research needs to examine whether the question is consistent with evolutionary and neurophysiological accounts of personality science.
Keywords: personality, curvilinearity, inverted U, nonlinearity, personality disorders
Abstract: Contemporary personality taxonomies cast personality traits as ranging from the maladaptive (e.g., low conscientiousness) to adaptive (e.g., high conscientiousness) levels. Despite philosophical and conventional wisdom dating back to the ancients, researchers have only recently begun to uncover evidence that extreme standing on “normal” or “desirable” personality traits might be maladaptive. Here, we present an emerging perspective on why and how extreme standing on “desirable” trait continua translates into maladaptive behavior and undesirable outcomes at work and in life. An overview of the literature on the topic is presented for each trait within the five-factor model. We suggest two reasons for the lack of clarity in the empirical literature: (a) problems with statistical tests resulting from measurement error and (b) lack of breadth in the conceptualization and measurement of personality traits. We suggest that a solution to this problem is to extend trait continua to reflect maladaptive levels at both ends. We close by pointing out that a major implication of this emerging perspective indicates that many more people possess optimal personality-trait levels than previously thought and that future research needs to examine whether the question is consistent with evolutionary and neurophysiological accounts of personality science.
Keywords: personality, curvilinearity, inverted U, nonlinearity, personality disorders
27% of participants have kept a financial secret from their partner; and both marital & life satisfaction were lower for participants who have experienced financial infidelity than in those who have not
Jeanfreau, M., Noguchi, K., Mong, M. D., & Stadthagen, H. (2018). Financial Infidelity in Couple Relationships. Journal of Financial Therapy, 9(1) 2. https://doi.org/10.4148/1944-9771.1159
Four hundred and fourteen participants answered questions regarding financial habits within the context of the couple relationship.The Big Five Personality Inventory and a Martial and Life Satisfaction Scale were used to determine the incidence and factors associated with financial infidelity. Results indicated that 27% of participants have kept a financial secret from their partner. Furthermore, both marital and life satisfaction were lower for participants who have experienced financial infidelity than in those who have not. Finally, conscientiousness, a factor from the Big Five Personality Inventory, showed a significant difference, suggesting that more organized individuals were less likely to keep financial secrets. Clinical implications are also discussed.
Four hundred and fourteen participants answered questions regarding financial habits within the context of the couple relationship.The Big Five Personality Inventory and a Martial and Life Satisfaction Scale were used to determine the incidence and factors associated with financial infidelity. Results indicated that 27% of participants have kept a financial secret from their partner. Furthermore, both marital and life satisfaction were lower for participants who have experienced financial infidelity than in those who have not. Finally, conscientiousness, a factor from the Big Five Personality Inventory, showed a significant difference, suggesting that more organized individuals were less likely to keep financial secrets. Clinical implications are also discussed.
Friday, October 26, 2018
Bacon's ideas are central in the culture of growth; his epistemology derives from his jurisprudence &, hence, reflects common-law culture, which can help explain the coincidence of early political & economic development in England
Toward understanding 17th century English culture: A structural topic model of Francis Bacon's ideas. PeterGrajzl, Peter Murrell. Journal of Comparative Economics, https://doi.org/10.1016/j.jce.2018.10.004
Highlights
• Bacon's ideas are central in the culture of growth of early modern England.
• We study Bacon's thought using machine-learning tools for analysis of text-as-data.
• Bacon communicated strategically and did not emphasize some ideas later viewed as Baconian.
• Bacon's epistemology derives from his jurisprudence and, hence, reflects common-law culture.
• Features and origins of Bacon's ideas help interpret England's early development.
Abstract: We use machine-learning methods to study the features and origins of the ideas of Francis Bacon, a key figure who provided the intellectual roots of a cultural paradigm that spurred modern economic development. Bacon's works are the data in an estimation of a structural topic model, a recently developed methodology for analysis of text corpora. The estimates uncover sixteen topics prominent in Bacon's opus. Two are key elements of the ideas usually associated with Bacon—inductive epistemology and fact-seeking. The utilitarian promise of science and the centralized organization of the scientific quest, embraced by Bacon's followers, were not emphasized by him. Using strategic communication, Bacon facilitated reception of his scientific methodology, targeted influential groups, and finessed powerful opponents. We provide the first quantitative evidence that the genesis of Bacon's epistemology lies in his experience in the common-law. Combining our findings with accepted arguments in the existing literature, we suggest that the effects of common-law culture can help explain the coincidence of early political and economic development in England.
Highlights
• Bacon's ideas are central in the culture of growth of early modern England.
• We study Bacon's thought using machine-learning tools for analysis of text-as-data.
• Bacon communicated strategically and did not emphasize some ideas later viewed as Baconian.
• Bacon's epistemology derives from his jurisprudence and, hence, reflects common-law culture.
• Features and origins of Bacon's ideas help interpret England's early development.
Abstract: We use machine-learning methods to study the features and origins of the ideas of Francis Bacon, a key figure who provided the intellectual roots of a cultural paradigm that spurred modern economic development. Bacon's works are the data in an estimation of a structural topic model, a recently developed methodology for analysis of text corpora. The estimates uncover sixteen topics prominent in Bacon's opus. Two are key elements of the ideas usually associated with Bacon—inductive epistemology and fact-seeking. The utilitarian promise of science and the centralized organization of the scientific quest, embraced by Bacon's followers, were not emphasized by him. Using strategic communication, Bacon facilitated reception of his scientific methodology, targeted influential groups, and finessed powerful opponents. We provide the first quantitative evidence that the genesis of Bacon's epistemology lies in his experience in the common-law. Combining our findings with accepted arguments in the existing literature, we suggest that the effects of common-law culture can help explain the coincidence of early political and economic development in England.
Adult participants who chewed gum while studying a 9‐min lesson on a mental mathematics strategy outperformed a nonchewing condition on a subsequent problem‐solving test, whereas also reporting higher levels of postlesson alertness
Chewing gum while studying: Effects on alertness and test performance. Paul Ginns, Theresa Kim, Eleni Zervos. Applied Cognitive Psychology, https://doi.org/10.1002/acp.3467
Summary: Recent research has demonstrated chewing gum can enhance various cognitive processes associated with learning, but most studies have used cognitive functioning tasks (e.g., selective attention and working memory) as outcomes. Across two experiments, we investigated effects of chewing gum on self‐reports of alertness and test performance following study of realistic educational materials. In Experiment 1 (n = 40), adult participants who chewed gum while studying a 20‐min physiology lesson outperformed a nonchewing condition on subsequent terminology and comprehension tests, but did not report higher levels of postlesson alertness as hypothesised. In Experiment 2 (n = 39), adult participants who chewed gum while studying a 9‐min lesson on a mental mathematics strategy outperformed a nonchewing condition on a subsequent problem‐solving test, whereas also reporting higher levels of postlesson alertness. The results provide initial support for chewing gum while studying realistic educational materials across a range of topics and study durations.
Summary: Recent research has demonstrated chewing gum can enhance various cognitive processes associated with learning, but most studies have used cognitive functioning tasks (e.g., selective attention and working memory) as outcomes. Across two experiments, we investigated effects of chewing gum on self‐reports of alertness and test performance following study of realistic educational materials. In Experiment 1 (n = 40), adult participants who chewed gum while studying a 20‐min physiology lesson outperformed a nonchewing condition on subsequent terminology and comprehension tests, but did not report higher levels of postlesson alertness as hypothesised. In Experiment 2 (n = 39), adult participants who chewed gum while studying a 9‐min lesson on a mental mathematics strategy outperformed a nonchewing condition on a subsequent problem‐solving test, whereas also reporting higher levels of postlesson alertness. The results provide initial support for chewing gum while studying realistic educational materials across a range of topics and study durations.
The intense selection of chickens for production traits (egg laying) is thought to cause undesirable side effects & changes in behavior due to trade-offs from energy expenditure; contrary to expectations, productive hens show increased cognitive skills
More Than Eggs – Relationship Between Productivity and Learning in Laying Hens. Anissa Dudde, E. Tobias Krause, Lindsay R. Matthews & Lars Schrader. Front. Psychol., October 26 2018, https://doi.org/10.3389/fpsyg.2018.02000
Abstract: The intense selection of chickens for production traits, such as egg laying, is thought to cause undesirable side effects and changes in behavior. Trade-offs resulting from energy expenditure in productivity may influence other traits: in order to sustain energetic costs for high egg production, energy expenditure may be redirected away from specific behavioral traits. For example, such energetic trade-offs may change the hens’ cognitive abilities. Therefore, we hypothesized highly productive laying hens to show reduced learning performance in comparison to moderate productive lines. We examined the learning ability of four chicken lines that differed in laying performance (200 versus 300 eggs/year) and phylogenetic origin (brown/white layer; respectively, within performance). In total 61 hens were tested in semi-automated Skinner boxes in a three-phase learning paradigm (initial learning, reversal learning, extinction). To measure the hens’ learning performance within each phase, we compared the number of active decisions needed to fulfill a learning criteria (80% correct choices for learning, 70% no responses at extinction) using linear models. Differences between the proportions of hens per line that reached criterion on each phase of the learning tasks were analyzed by using a Kaplan–Meier (KM) survival analysis. A greater proportion of high productive hens achieved the learning criteria on each phase compared to less productive hens (Chi23 = 8.25, p = 0.041). Furthermore, high productive hens accomplished the learning criteria after fewer active decisions in the initial phase (p = 0.012) and in extinction (p = 0.004) compared to the less selected lines. Phylogenetic origin was associated with differences in learning in extinction. Our results contradict our hypothesis and indicate that the selection for productivity traits has led to changes in learning behavior and the high productive laying hens possessed a better learning strategy compared to moderate productive hens in a feeding-rewarding context. This better performance may be a response to constraints resulting from high selection as it may enable these hens to efficiently acquire additional energy resources. Underlying mechanisms for this may be directly related to differences in neuronal structure or indirectly to foraging strategies and changes in personality traits such as fearfulness and sociality.
Abstract: The intense selection of chickens for production traits, such as egg laying, is thought to cause undesirable side effects and changes in behavior. Trade-offs resulting from energy expenditure in productivity may influence other traits: in order to sustain energetic costs for high egg production, energy expenditure may be redirected away from specific behavioral traits. For example, such energetic trade-offs may change the hens’ cognitive abilities. Therefore, we hypothesized highly productive laying hens to show reduced learning performance in comparison to moderate productive lines. We examined the learning ability of four chicken lines that differed in laying performance (200 versus 300 eggs/year) and phylogenetic origin (brown/white layer; respectively, within performance). In total 61 hens were tested in semi-automated Skinner boxes in a three-phase learning paradigm (initial learning, reversal learning, extinction). To measure the hens’ learning performance within each phase, we compared the number of active decisions needed to fulfill a learning criteria (80% correct choices for learning, 70% no responses at extinction) using linear models. Differences between the proportions of hens per line that reached criterion on each phase of the learning tasks were analyzed by using a Kaplan–Meier (KM) survival analysis. A greater proportion of high productive hens achieved the learning criteria on each phase compared to less productive hens (Chi23 = 8.25, p = 0.041). Furthermore, high productive hens accomplished the learning criteria after fewer active decisions in the initial phase (p = 0.012) and in extinction (p = 0.004) compared to the less selected lines. Phylogenetic origin was associated with differences in learning in extinction. Our results contradict our hypothesis and indicate that the selection for productivity traits has led to changes in learning behavior and the high productive laying hens possessed a better learning strategy compared to moderate productive hens in a feeding-rewarding context. This better performance may be a response to constraints resulting from high selection as it may enable these hens to efficiently acquire additional energy resources. Underlying mechanisms for this may be directly related to differences in neuronal structure or indirectly to foraging strategies and changes in personality traits such as fearfulness and sociality.
Thursday, October 25, 2018
Rolf Degen summarizing: Across cultures, women agreed about which male faces signalled a penchant for sexual unfaithfulness, but actual hit rate was low, indicating that potential cheaters evolved to hide their true nature
Impressions of sexual unfaithfulness and their accuracy show a degree of universality. Clare A. M. Sutherland et al. PLOS One, https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0205716
Abstract: Forming accurate impressions of others’ trustworthiness is a critical social skill, with faithfulness representing a key aspect of trust in sexual relationships. Interestingly, there is evidence for a small degree of accuracy in facial impressions of sexual unfaithfulness. Theoretical accounts suggest that these impressions may function to help with partner selection, and may be universal. If so, impressions should be similar for perceivers from different cultures and accuracy should not be limited to own-race faces. We tested these predictions by asking Caucasian and Asian women to judge the likelihood of unfaithfulness from the faces of Caucasian males whose past sexual history was known. In two studies we found high cross-cultural agreement in these impressions, consistent with universality in the impressions themselves. In Study 1, we found an other-race effect in impression accuracy, with significantly less accurate cross-race impressions by Asian women than own-race impressions by Caucasian women. Asian women showed no accuracy. Interestingly, in Study 2, Asian women who had grown up in the West showed small but significant accuracy in their impressions, with no other-race effect. Results are consistent with a degree of universality in the accuracy of this important aspect of social perception, provided that perceivers have experience with the faces being assessed.
Abstract: Forming accurate impressions of others’ trustworthiness is a critical social skill, with faithfulness representing a key aspect of trust in sexual relationships. Interestingly, there is evidence for a small degree of accuracy in facial impressions of sexual unfaithfulness. Theoretical accounts suggest that these impressions may function to help with partner selection, and may be universal. If so, impressions should be similar for perceivers from different cultures and accuracy should not be limited to own-race faces. We tested these predictions by asking Caucasian and Asian women to judge the likelihood of unfaithfulness from the faces of Caucasian males whose past sexual history was known. In two studies we found high cross-cultural agreement in these impressions, consistent with universality in the impressions themselves. In Study 1, we found an other-race effect in impression accuracy, with significantly less accurate cross-race impressions by Asian women than own-race impressions by Caucasian women. Asian women showed no accuracy. Interestingly, in Study 2, Asian women who had grown up in the West showed small but significant accuracy in their impressions, with no other-race effect. Results are consistent with a degree of universality in the accuracy of this important aspect of social perception, provided that perceivers have experience with the faces being assessed.
Ignorance of History and Perceptions of Racism: Another Look at the Marley Hypothesis
Ignorance of History and Perceptions of Racism: Another Look at the Marley Hypothesis. Jason E. Strickhouser, Ethan Zell, Kara E. Harris. Social Psychological and Personality Science, https://doi.org/10.1177/1948550618808863
Abstract: Why do White Americans perceive less racism than Black Americans? Two provocative studies on the Marley hypothesis suggest that White Americans are more ignorant of historical instances of racism than Black Americans and that ignorance of history mediates racial differences in perceptions of racism. We conducted two replications of the Marley hypothesis in a different institutional and regional context than prior studies. In contrast with prior findings, the difference between White and Black Americans knowledge of historical racism was not significant in either of our replications and was dramatically smaller than that obtained in prior studies. Thus, the present research failed to replicate the mediation effect found in prior studies. We discuss potential explanations for these discrepant findings (e.g., differences in institution and region) and call for additional research examining whether the Marley hypothesis is moderated by cultural contexts.
Keywords: social perception, racism, minority groups, intergroup relations, replication
Abstract: Why do White Americans perceive less racism than Black Americans? Two provocative studies on the Marley hypothesis suggest that White Americans are more ignorant of historical instances of racism than Black Americans and that ignorance of history mediates racial differences in perceptions of racism. We conducted two replications of the Marley hypothesis in a different institutional and regional context than prior studies. In contrast with prior findings, the difference between White and Black Americans knowledge of historical racism was not significant in either of our replications and was dramatically smaller than that obtained in prior studies. Thus, the present research failed to replicate the mediation effect found in prior studies. We discuss potential explanations for these discrepant findings (e.g., differences in institution and region) and call for additional research examining whether the Marley hypothesis is moderated by cultural contexts.
Keywords: social perception, racism, minority groups, intergroup relations, replication
The activity of midbrain dopamine neurons & mesolimbic dopamine levels are consistently modulated by anticipated future reward more strongly & consistently than effort, even after weighting reward & effort on behavior equally
What Is the Relationship between Dopamine and Effort? Mark E.Walton and Sebastien Bouret. Trends in Neurosciences, https://doi.org/10.1016/j.tins.2018.10.001
Highlights
* Compared to reward, effort remains poorly understood, both at the behavioral and neurophysiological levels.
* Dopamine has been proposed as central to effort-related decision making, but its role is not clearly defined.
* In fact, the activity of midbrain dopamine neurons and mesolimbic dopamine levels are consistently modulated by anticipated future reward more strongly and consistently than effort, even when the weight of reward and effort on behavior are equated.
* These signals may promote decisions to act based on the potential gain from a future reward.
Abstract: The trade-off between reward and effort is at the heart of most behavioral theories, from ecology to economics. Compared to reward, however, effort remains poorly understood, both at the behavioral and neurophysiological levels. This is important because unwillingness to overcome effort to gain reward is a common feature of many neuropsychiatric and neurological disorders. A recent surge in interest in the neurobiological basis of effort has led to seemingly conflicting results regarding the role of dopamine. We argue here that, upon closer examination, there is actually striking consensus across studies: dopamine primarily codes for future reward but is less sensitive to anticipated effort cost. This strong association between dopamine and the incentive effects of rewards places dopamine in a key position to promote reward-directed action.
Highlights
* Compared to reward, effort remains poorly understood, both at the behavioral and neurophysiological levels.
* Dopamine has been proposed as central to effort-related decision making, but its role is not clearly defined.
* In fact, the activity of midbrain dopamine neurons and mesolimbic dopamine levels are consistently modulated by anticipated future reward more strongly and consistently than effort, even when the weight of reward and effort on behavior are equated.
* These signals may promote decisions to act based on the potential gain from a future reward.
Abstract: The trade-off between reward and effort is at the heart of most behavioral theories, from ecology to economics. Compared to reward, however, effort remains poorly understood, both at the behavioral and neurophysiological levels. This is important because unwillingness to overcome effort to gain reward is a common feature of many neuropsychiatric and neurological disorders. A recent surge in interest in the neurobiological basis of effort has led to seemingly conflicting results regarding the role of dopamine. We argue here that, upon closer examination, there is actually striking consensus across studies: dopamine primarily codes for future reward but is less sensitive to anticipated effort cost. This strong association between dopamine and the incentive effects of rewards places dopamine in a key position to promote reward-directed action.
Competition- & mate-related cues & interactions rapidly increase testosterone; these increases map onto ongoing and future competitive and mate-seeking behaviours; testosterone administration rapidly modulates neural processing & behaviour
Human social neuroendocrinology: Review of the rapid effects of testosterone. Shawn N.Geniole, Justin M.Carré. Hormones and Behavior, Volume 104, August 2018, Pages 192-205. https://doi.org/10.1016/j.yhbeh.2018.06.001
Highlights
• We review human social neuroendocrinology studies involving testosterone.
• Competition- and mate-related cues and interactions rapidly increase testosterone.
• These increases map onto ongoing and future competitive and mate-seeking behaviours.
• Testosterone administration rapidly modulates neural processing and behaviour.
• We propose a new, integrative model: the Fitness Model of Testosterone Dynamics.
Abstract: It is well documented that testosterone concentrations change rapidly within reproductively relevant contexts (e.g., competition, mate-seeking). It has been argued that such rapid changes in testosterone may serve to adaptively fine-tune ongoing and/or future social behaviour according to one's social environment. In this paper, we review human correlational and experimental evidence suggesting that testosterone fluctuates rapidly in response to competition and mate-seeking cues, and that such acute changes may serve to modulate ongoing and/or future social behaviours (e.g., risk-taking, competitiveness, mate-seeking, and aggression). Some methodological details, which limit interpretation of some of this human work, are also discussed. We conclude with a new integrative model of testosterone secretion and behaviour, the Fitness Model of Testosterone Dynamics. Although we focus primarily on human aggression in this review, we also highlight research on risk-taking, competitiveness, and mate-seeking behaviour.
Highlights
• We review human social neuroendocrinology studies involving testosterone.
• Competition- and mate-related cues and interactions rapidly increase testosterone.
• These increases map onto ongoing and future competitive and mate-seeking behaviours.
• Testosterone administration rapidly modulates neural processing and behaviour.
• We propose a new, integrative model: the Fitness Model of Testosterone Dynamics.
Abstract: It is well documented that testosterone concentrations change rapidly within reproductively relevant contexts (e.g., competition, mate-seeking). It has been argued that such rapid changes in testosterone may serve to adaptively fine-tune ongoing and/or future social behaviour according to one's social environment. In this paper, we review human correlational and experimental evidence suggesting that testosterone fluctuates rapidly in response to competition and mate-seeking cues, and that such acute changes may serve to modulate ongoing and/or future social behaviours (e.g., risk-taking, competitiveness, mate-seeking, and aggression). Some methodological details, which limit interpretation of some of this human work, are also discussed. We conclude with a new integrative model of testosterone secretion and behaviour, the Fitness Model of Testosterone Dynamics. Although we focus primarily on human aggression in this review, we also highlight research on risk-taking, competitiveness, and mate-seeking behaviour.
The Moral Machine gathered 40 million decisions in ten languages from millions of people in 233 countries: Differences correlate with modern institutions and deep cultural traits
The Moral Machine experiment. Edmond Awad, Sohan Dsouza, Richard Kim, Jonathan Schulz, Joseph Henrich, Azim Shariff, Jean-François Bonnefon & Iyad Rahwan. Nature (2018), https://www.nature.com/articles/s41586-018-0637-6
Abstract: With the rapid development of artificial intelligence have come concerns about how machines will make moral decisions, and the major challenge of quantifying societal expectations about the ethical principles that should guide machine behaviour. To address this challenge, we deployed the Moral Machine, an online experimental platform designed to explore the moral dilemmas faced by autonomous vehicles. This platform gathered 40 million decisions in ten languages from millions of people in 233 countries and territories. Here we describe the results of this experiment. First, we summarize global moral preferences. Second, we document individual variations in preferences, based on respondents’ demographics. Third, we report cross-cultural ethical variation, and uncover three major clusters of countries. Fourth, we show that these differences correlate with modern institutions and deep cultural traits. We discuss how these preferences can contribute to developing global, socially acceptable principles for machine ethics. All data used in this article are publicly available.
Abstract: With the rapid development of artificial intelligence have come concerns about how machines will make moral decisions, and the major challenge of quantifying societal expectations about the ethical principles that should guide machine behaviour. To address this challenge, we deployed the Moral Machine, an online experimental platform designed to explore the moral dilemmas faced by autonomous vehicles. This platform gathered 40 million decisions in ten languages from millions of people in 233 countries and territories. Here we describe the results of this experiment. First, we summarize global moral preferences. Second, we document individual variations in preferences, based on respondents’ demographics. Third, we report cross-cultural ethical variation, and uncover three major clusters of countries. Fourth, we show that these differences correlate with modern institutions and deep cultural traits. We discuss how these preferences can contribute to developing global, socially acceptable principles for machine ethics. All data used in this article are publicly available.
Sex & the city. Are financial decisions driven by emotions? Our findings suggest that agents incorrectly attribute their good mood to positive economic perspectives rather than positive emotions
Sex & the city. Are financial decisions driven by emotions? Giampaolo Gabbi, Giovanna Zanotti. Journal of Behavioral and Experimental Finance, https://doi.org/10.1016/j.jbef.2018.10.005
Abstract: Although the role of irrationality in trading choices has been extensively discussed in the literature, individual incidental emotions have been neglected. We investigated emotional explanatory factors and trading choices in a sample of non-professional agents who managed a virtual financial positions pretending to be traders. Using a series of daily surveys over a five-week period as well as introductive inventory surveys, we constructed measures of core affect and emotions and correlated these with subjects’ financial choices. Our purpose is to test if the decision to buy or sell financial assets is affected by the emotional state of individuals, considering also gender clusters. A focus is on incidental emotions, detecting how positive emotions due to sexual activity may alter financial trading choices. Our findings suggest that agents incorrectly attribute their good mood to positive economic perspectives rather than positive emotions.
Abstract: Although the role of irrationality in trading choices has been extensively discussed in the literature, individual incidental emotions have been neglected. We investigated emotional explanatory factors and trading choices in a sample of non-professional agents who managed a virtual financial positions pretending to be traders. Using a series of daily surveys over a five-week period as well as introductive inventory surveys, we constructed measures of core affect and emotions and correlated these with subjects’ financial choices. Our purpose is to test if the decision to buy or sell financial assets is affected by the emotional state of individuals, considering also gender clusters. A focus is on incidental emotions, detecting how positive emotions due to sexual activity may alter financial trading choices. Our findings suggest that agents incorrectly attribute their good mood to positive economic perspectives rather than positive emotions.
Rodents' ultrasonic vocalizations are actively produced by both sexes during sexual interactions, contrary to earlier assumptions; male-typical and female-typical vocal behaviors can be identified
Vocal Signals of Sexual Motivation in Male and Female Rodents. Marcela Fernández-Vargas. Current Sexual Health Reports, https://link.springer.com/article/10.1007/s11930-018-0179-9
Abstract
Purpose of the Review: Rodents produce ultrasonic vocalizations (USV) under different social contexts, including courtship and reproduction. The present review aims to summarize the behavioral, bioacoustical, and physiological evidence that USV are reliable signals of sexual motivation in both male and female rodents.
Recent Findings: USV are actively produced by both sexes during sexual interactions, contrary to earlier assumptions. Male-typical and female-typical vocal behaviors can be identified. Calling rates and acoustic parameters, such as call duration, frequency, and energy, can be modulated rapidly over time by motivational state and sexual context. USV produced in response to sexual context could be regulated by the brain on a moment-to-moment basis through non-classical mechanisms of steroid action. Finally, I provide some practical considerations for the acoustic and statistical analyses of these vocal signals.
Summary: USV can be used as signals of sexual motivation in both sexes to study brain and hormonal mechanisms underlying sexual behavior or sexual differentiation.
Keywords: Ultrasonic vocalizations Sexual behavior Sexual motivation Sex steroids Bioacoustics Communication Nongenomic steroid action Rodents House mouse Rats Golden hamsters Syrian hamsters
Abstract
Purpose of the Review: Rodents produce ultrasonic vocalizations (USV) under different social contexts, including courtship and reproduction. The present review aims to summarize the behavioral, bioacoustical, and physiological evidence that USV are reliable signals of sexual motivation in both male and female rodents.
Recent Findings: USV are actively produced by both sexes during sexual interactions, contrary to earlier assumptions. Male-typical and female-typical vocal behaviors can be identified. Calling rates and acoustic parameters, such as call duration, frequency, and energy, can be modulated rapidly over time by motivational state and sexual context. USV produced in response to sexual context could be regulated by the brain on a moment-to-moment basis through non-classical mechanisms of steroid action. Finally, I provide some practical considerations for the acoustic and statistical analyses of these vocal signals.
Summary: USV can be used as signals of sexual motivation in both sexes to study brain and hormonal mechanisms underlying sexual behavior or sexual differentiation.
Keywords: Ultrasonic vocalizations Sexual behavior Sexual motivation Sex steroids Bioacoustics Communication Nongenomic steroid action Rodents House mouse Rats Golden hamsters Syrian hamsters
Wednesday, October 24, 2018
Despite their limited optical resolution, Drosophila melanogaster’s neuronal architecture has the capability to extract & encode a rich feature set that allows flies to re-identify individual conspecifics with surprising accuracy
Schneider J, Murali N, Taylor GW, Levine JD (2018) Can Drosophila melanogaster tell who’s who? PLoS ONE 13(10): e0205043. https://doi.org/10.1371/journal.pone.0205043
Abstract: Drosophila melanogaster are known to live in a social but cryptic world of touch and odours, but the extent to which they can perceive and integrate static visual information is a hotly debated topic. Some researchers fixate on the limited resolution of D. melanogaster’s optics, others on their seemingly identical appearance; yet there is evidence of individual recognition and surprising visual learning in flies. Here, we apply machine learning and show that individual D. melanogaster are visually distinct. We also use the striking similarity of Drosophila’s visual system to current convolutional neural networks to theoretically investigate D. melanogaster’s capacity for visual understanding. We find that, despite their limited optical resolution, D. melanogaster’s neuronal architecture has the capability to extract and encode a rich feature set that allows flies to re-identify individual conspecifics with surprising accuracy. These experiments provide a proof of principle that Drosophila inhabit a much more complex visual world than previously appreciated.
Abstract: Drosophila melanogaster are known to live in a social but cryptic world of touch and odours, but the extent to which they can perceive and integrate static visual information is a hotly debated topic. Some researchers fixate on the limited resolution of D. melanogaster’s optics, others on their seemingly identical appearance; yet there is evidence of individual recognition and surprising visual learning in flies. Here, we apply machine learning and show that individual D. melanogaster are visually distinct. We also use the striking similarity of Drosophila’s visual system to current convolutional neural networks to theoretically investigate D. melanogaster’s capacity for visual understanding. We find that, despite their limited optical resolution, D. melanogaster’s neuronal architecture has the capability to extract and encode a rich feature set that allows flies to re-identify individual conspecifics with surprising accuracy. These experiments provide a proof of principle that Drosophila inhabit a much more complex visual world than previously appreciated.
Voters appear to be sorting on non-political neighborhood attributes that covary with partisan preferences rather than explicitly seeking politically congruent neighbors; location must have some influence on political preference, rather than the other way around
Does residential sorting explain geographic polarization? Gregory J. Martin & Steven W. Webster. Political Science Research and Methods, https://doi.org/10.1017/psrm.2018.44
Abstract: Political preferences in the United States are highly correlated with population density, at national, state, and metropolitan-area scales. Using new data from voter registration records, we assess the extent to which this pattern can be explained by geographic mobility. We find that the revealed preferences of voters who move from one residence to another correlate with partisan affiliation, though voters appear to be sorting on non-political neighborhood attributes that covary with partisan preferences rather than explicitly seeking politically congruent neighbors. But, critically, we demonstrate through a simulation study that the estimated partisan bias in moving choices is on the order of five times too small to sustain the current geographic polarization of preferences. We conclude that location must have some influence on political preference, rather than the other way around, and provide evidence in support of this theory.
Abstract: Political preferences in the United States are highly correlated with population density, at national, state, and metropolitan-area scales. Using new data from voter registration records, we assess the extent to which this pattern can be explained by geographic mobility. We find that the revealed preferences of voters who move from one residence to another correlate with partisan affiliation, though voters appear to be sorting on non-political neighborhood attributes that covary with partisan preferences rather than explicitly seeking politically congruent neighbors. But, critically, we demonstrate through a simulation study that the estimated partisan bias in moving choices is on the order of five times too small to sustain the current geographic polarization of preferences. We conclude that location must have some influence on political preference, rather than the other way around, and provide evidence in support of this theory.
Jackdaws delayed longest in entering their nest-box after encountering a stimulus that should not move independently, suggesting they recognized the movement as unexpected
Wild jackdaws are wary of objects that violate expectations of animacy. Alison L. Greggor, Guillam E. McIvor, Nicola S. Clayton, Alex Thornton. Royal Society Open Science, DOI: 10.1098/rsos.181070
Abstract: Nature is composed of self-propelled, animate agents and inanimate objects. Laboratory studies have shown that human infants and a few species discriminate between animate and inanimate objects. This ability is assumed to have evolved to support social cognition and filial imprinting, but its ecological role for wild animals has never been examined. An alternative, functional explanation is that discriminating stimuli based on their potential for animacy helps animals distinguish between harmless and threatening stimuli. Using remote-controlled experimental stimulus presentations, we tested if wild jackdaws (Corvus monedula) respond fearfully to stimuli that violate expectations for movement. Breeding pairs (N = 27) were presented at their nests with moving and non-moving models of ecologically relevant stimuli (birds, snakes and sticks) that differed in threat level and propensity for independent motion. Jackdaws were startled by movement regardless of stimulus type and produced more alarm calls when faced with animate objects. However, they delayed longest in entering their nest-box after encountering a stimulus that should not move independently, suggesting they recognized the movement as unexpected. How jackdaws develop expectations about object movement is not clear, but our results suggest that discriminating between animate and inanimate stimuli may trigger information gathering about potential threats.
Abstract: Nature is composed of self-propelled, animate agents and inanimate objects. Laboratory studies have shown that human infants and a few species discriminate between animate and inanimate objects. This ability is assumed to have evolved to support social cognition and filial imprinting, but its ecological role for wild animals has never been examined. An alternative, functional explanation is that discriminating stimuli based on their potential for animacy helps animals distinguish between harmless and threatening stimuli. Using remote-controlled experimental stimulus presentations, we tested if wild jackdaws (Corvus monedula) respond fearfully to stimuli that violate expectations for movement. Breeding pairs (N = 27) were presented at their nests with moving and non-moving models of ecologically relevant stimuli (birds, snakes and sticks) that differed in threat level and propensity for independent motion. Jackdaws were startled by movement regardless of stimulus type and produced more alarm calls when faced with animate objects. However, they delayed longest in entering their nest-box after encountering a stimulus that should not move independently, suggesting they recognized the movement as unexpected. How jackdaws develop expectations about object movement is not clear, but our results suggest that discriminating between animate and inanimate stimuli may trigger information gathering about potential threats.
Canada: Secularized women are found to have lower fertility rates compared with the actively religious; the strictly seculars, a proxy identifier for the atheists, have the lowest fertility & the highest likelihood of remaining childless
Religiosity, Secularity and Fertility in Canada. Maryam Dilmaghani. European Journal of Population, https://link.springer.com/article/10.1007/s10680-018-9487-z
Abstract: Using several cycles of the Canadian General Social Survey covering cohorts born from the early 1900s onwards, this paper examines how religiosity and secularity associate with fertility in Canada. The analysis shows that among multiple dimensions of religiosity, religious attendance is the strongest predictor of higher fertility in the country. For the latest cycle conducted in 2011, three mutually exclusive groups of secularized women are compared with the actively religious in their fertility behaviour and intentions. All these secularized women are found to have lower fertility rates compared with the actively religious. Among them, the strictly seculars, a proxy identifier for the atheists, have the lowest fertility and the highest likelihood of remaining childless. Various implications are discussed.
Keywords: Fertility, Religiosity, Secularity, Canada
Abstract: Using several cycles of the Canadian General Social Survey covering cohorts born from the early 1900s onwards, this paper examines how religiosity and secularity associate with fertility in Canada. The analysis shows that among multiple dimensions of religiosity, religious attendance is the strongest predictor of higher fertility in the country. For the latest cycle conducted in 2011, three mutually exclusive groups of secularized women are compared with the actively religious in their fertility behaviour and intentions. All these secularized women are found to have lower fertility rates compared with the actively religious. Among them, the strictly seculars, a proxy identifier for the atheists, have the lowest fertility and the highest likelihood of remaining childless. Various implications are discussed.
Keywords: Fertility, Religiosity, Secularity, Canada
The experience of a childhood trauma increases a person’s ability to take the perspective of another and to understand their mental and emotional states, & this impact is long-standing
Elevated empathy in adults following childhood trauma. David M. Greenberg et al. PLOS One, https://doi.org/10.1371/journal.pone.0203886
Abstract: Traumatic events increase the risk of depression, but there is also evidence that adversity can lead to posttraumatic growth, including increased compassion and prosocial behavior. To date there is no empirical research pinpointing childhood trauma to an increase in trait empathy in adulthood. Although somewhat counter-intuitive, this might be predicted if trauma not only increases fear of future threat but also renders the individual more sensitive to suffering in others. We explored this possible link using multiple studies, self-report measures, and non-clinical samples. Results across samples and measures showed that, on average, adults who reported experiencing a traumatic event in childhood had elevated empathy levels compared to adults who did not experience a traumatic event. Further, the severity of the trauma correlated positively with various components of empathy. These findings suggest that the experience of a childhood trauma increases a person’s ability to take the perspective of another and to understand their mental and emotional states, and that this impact is long-standing. Future research needs to test if this is seen on performance measures, and how these findings extend to clinical populations.
Abstract: Traumatic events increase the risk of depression, but there is also evidence that adversity can lead to posttraumatic growth, including increased compassion and prosocial behavior. To date there is no empirical research pinpointing childhood trauma to an increase in trait empathy in adulthood. Although somewhat counter-intuitive, this might be predicted if trauma not only increases fear of future threat but also renders the individual more sensitive to suffering in others. We explored this possible link using multiple studies, self-report measures, and non-clinical samples. Results across samples and measures showed that, on average, adults who reported experiencing a traumatic event in childhood had elevated empathy levels compared to adults who did not experience a traumatic event. Further, the severity of the trauma correlated positively with various components of empathy. These findings suggest that the experience of a childhood trauma increases a person’s ability to take the perspective of another and to understand their mental and emotional states, and that this impact is long-standing. Future research needs to test if this is seen on performance measures, and how these findings extend to clinical populations.
Abstinence from social media increased time spent engaged in browsing the Internet, working, childcare, and cooking/cleaning; time in social media was negatively associated with quality of day
Where does the time go? An experimental test of what social media displaces and displaced activities’ associations with affective well-being and quality of day. Jeffrey A Hall, Rebecca M Johnson, Elaina M Ross .New Media & Society, https://doi.org/10.1177/1461444818804775
Abstract: Drawing from media displacement theory, this article explores which activities are displaced when individuals spend time on social media. Community and undergraduate participants (N = 135) were randomly assigned to five conditions: no change in social media use, or abstinence from social media for 1 week, 2 weeks, 3 weeks, or 4 weeks. Participants completed a daily diary measuring how they spent time each day, affective well-being, and quality of day for 28 days. The results indicate that abstinence from social media increased time spent engaged in seven activities, primarily browsing the Internet, working, childcare, and cooking/cleaning. In addition, associations among psychosocial outcomes and the displaced activities were examined. Time spent working, sleeping, and cooking/cleaning were negatively associated with affective well-being and quality of day. On days participants used social media, minutes of use were negatively associated with quality of day. The results suggest that social media primarily displaces unpleasant or neutral activities.
Keywords: Diary study, media displacement, social media use, time, well-being
Abstract: Drawing from media displacement theory, this article explores which activities are displaced when individuals spend time on social media. Community and undergraduate participants (N = 135) were randomly assigned to five conditions: no change in social media use, or abstinence from social media for 1 week, 2 weeks, 3 weeks, or 4 weeks. Participants completed a daily diary measuring how they spent time each day, affective well-being, and quality of day for 28 days. The results indicate that abstinence from social media increased time spent engaged in seven activities, primarily browsing the Internet, working, childcare, and cooking/cleaning. In addition, associations among psychosocial outcomes and the displaced activities were examined. Time spent working, sleeping, and cooking/cleaning were negatively associated with affective well-being and quality of day. On days participants used social media, minutes of use were negatively associated with quality of day. The results suggest that social media primarily displaces unpleasant or neutral activities.
Keywords: Diary study, media displacement, social media use, time, well-being
Tuesday, October 23, 2018
Local Competition Amplifies the Corrosive Effects of Inequality: Inequality is at its most damaging when it arises between close competitors
Local Competition Amplifies the Corrosive Effects of Inequality. D. B. Krupp, Thomas R. Cook. Psychological Science, https://doi.org/10.1177/0956797617748419
Abstract: Inequality is widely believed to incite conflict, but the evidence is inconsistent. We argue that the spatial scale of competition—the extent to which individuals compete locally, with their interaction partners, or globally, with the entire population—can help settle the question. We built a mathematical model of the evolution of conflict under inequality and tested its predictions in an experimental game with 1,205 participants. We found that inequality increases conflict, destroys wealth, and engenders risk taking. Crucially, these effects are amplified by local competition. Thus, inequality is at its most damaging when it arises between close competitors. Indeed, at the extremes, the combined effects of inequality and the scale of competition are very large. More broadly, our findings suggest that disagreements in the literature may be the result of a mismatch between the scale at which inequality is measured and the scale at which conflict occurs.
Keywords: inequality, scale of competition, conflict, relative deprivation, tragedy of the commons, risk taking, open data, open materials, preregistered
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Mainstream media, same author: https://aeon.co/ideas/kill-the-competition-why-siblings-fight-but-colleagues-cooperate (h/t alert reader)
Abstract: Inequality is widely believed to incite conflict, but the evidence is inconsistent. We argue that the spatial scale of competition—the extent to which individuals compete locally, with their interaction partners, or globally, with the entire population—can help settle the question. We built a mathematical model of the evolution of conflict under inequality and tested its predictions in an experimental game with 1,205 participants. We found that inequality increases conflict, destroys wealth, and engenders risk taking. Crucially, these effects are amplified by local competition. Thus, inequality is at its most damaging when it arises between close competitors. Indeed, at the extremes, the combined effects of inequality and the scale of competition are very large. More broadly, our findings suggest that disagreements in the literature may be the result of a mismatch between the scale at which inequality is measured and the scale at which conflict occurs.
Keywords: inequality, scale of competition, conflict, relative deprivation, tragedy of the commons, risk taking, open data, open materials, preregistered
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Mainstream media, same author: https://aeon.co/ideas/kill-the-competition-why-siblings-fight-but-colleagues-cooperate (h/t alert reader)
Academic gains of students enrolled in public schools compared to students of private BIP-creativity elementary schools (that aim to promote the development of talent, intelligence & personality): no differences at the end of fourth grade
Who is ahead at the end of elementary school? Student achievement gains in private BIP-Creativity schools and public schools. Frank Lipowsky et al. Zeitschrift für Erziehungswissenschaft, October 2018, Volume 21, Issue 5, pp 897–927. https://link.springer.com/article/10.1007/s11618-018-0807-1
Abstract: The number of students enrolled in private schools has been growing continuously in the past years, especially in elementary schools. There is a variety of reasons for this development. Among other expectations, parents anticipate a superior education for their children and hope for bigger academic success. However, empirical results on the effectiveness of private schools are inconsistent and ambiguous, partly because many studies used cross-sectional data. Longitudinal studies investigating the development of elementary school students are especially lacking.
The present study compares academic achievement gains of students enrolled in public schools to students who learned in the so-called BIP-creativity elementary schools. BIP schools are private schools that aim to promote the development of the talent, intelligence and personality of their students. This study investigates the development of students in mathematics, reading and orthography over a 4-years period.
As the group of BIP-students is selected in terms of their socio-economic background, analyses were run in two ways. First, multilevel analyses controlling for student and class characteristics were performed. Second, a Propensity Score Matching based on school enrollment data was used in order to select a comparable group of students from public schools. Each BIP-student was matched to a student from the public schools that had a comparable socio-economic background and similar cognitive characteristics. Neither multilevel analyses nor mean comparisons of the matched samples could reveal any differences between the two groups of students in the three domains of academic achievement at the end of fourth grade.
Keywords: BIP-creativity schools Elementary school Private school Public school Propensity Score Matching
Abstract: The number of students enrolled in private schools has been growing continuously in the past years, especially in elementary schools. There is a variety of reasons for this development. Among other expectations, parents anticipate a superior education for their children and hope for bigger academic success. However, empirical results on the effectiveness of private schools are inconsistent and ambiguous, partly because many studies used cross-sectional data. Longitudinal studies investigating the development of elementary school students are especially lacking.
The present study compares academic achievement gains of students enrolled in public schools to students who learned in the so-called BIP-creativity elementary schools. BIP schools are private schools that aim to promote the development of the talent, intelligence and personality of their students. This study investigates the development of students in mathematics, reading and orthography over a 4-years period.
As the group of BIP-students is selected in terms of their socio-economic background, analyses were run in two ways. First, multilevel analyses controlling for student and class characteristics were performed. Second, a Propensity Score Matching based on school enrollment data was used in order to select a comparable group of students from public schools. Each BIP-student was matched to a student from the public schools that had a comparable socio-economic background and similar cognitive characteristics. Neither multilevel analyses nor mean comparisons of the matched samples could reveal any differences between the two groups of students in the three domains of academic achievement at the end of fourth grade.
Keywords: BIP-creativity schools Elementary school Private school Public school Propensity Score Matching
The Heritability of Self-control: Meta-analysis based on a sample size of >100.000 individuals, published between 1996 and 2018, reveal that heritability is around 60%
Willems, Yayouk, Nicky Boesen, Jian-Bin Li, Meike Bartels, and Catrin Finkenauer. 2018. “The Heritability of Self-control: A Meta-analysis.” PsyArXiv. October 17. doi:10.31234/osf.io/eaz3d
Abstract: Self-control is the ability to control one’s impulses when faced with challenges or temptations, and is robustly associated with physiological and psychological well-being. Twin studies show that self-control is heritable, but estimates range between 0% and 90%, making it difficult to draw firm conclusions. The aim of this study was to perform a meta-analysis to provide a quantitative overview of the heritability of self-control. A systematic search resulted in 31 included studies, based on a sample size of >100.000 individuals, published between 1996 and 2018. Our results revealed an overall monozygotic twin correlation of .58, and an overall dizygotic twin correlation of .28, resulting in a heritability estimate of 60%. The heritability of self-control did not vary across gender or age. The heritability did differ across informants, with stronger heritability estimates based on parent report versus self-report or observations. This finding provides evidence that when aiming to understand individual differences in self-control, one should take genetic factors into account. Recommendations for future research are discussed.
Abstract: Self-control is the ability to control one’s impulses when faced with challenges or temptations, and is robustly associated with physiological and psychological well-being. Twin studies show that self-control is heritable, but estimates range between 0% and 90%, making it difficult to draw firm conclusions. The aim of this study was to perform a meta-analysis to provide a quantitative overview of the heritability of self-control. A systematic search resulted in 31 included studies, based on a sample size of >100.000 individuals, published between 1996 and 2018. Our results revealed an overall monozygotic twin correlation of .58, and an overall dizygotic twin correlation of .28, resulting in a heritability estimate of 60%. The heritability of self-control did not vary across gender or age. The heritability did differ across informants, with stronger heritability estimates based on parent report versus self-report or observations. This finding provides evidence that when aiming to understand individual differences in self-control, one should take genetic factors into account. Recommendations for future research are discussed.
Vegetarians reported lower self-esteem, lower psychological adjustment, less meaning in life, & more negative moods than semi-vegetarians & omnivores; also reported more negative social experiences than omnivores & semi-vegetarians
Relationships between Vegetarian Dietary Habits and Daily Well-Being. John B. Nezlek, Catherine A. Forestell & David B. Newman. Ecology of Food and Nutrition, https://www.tandfonline.com/doi/abs/10.1080/03670244.2018.1536657
ABSTRACT: The goal of the present study was to examine differences in the daily experiences of vegetarians and non-vegetarians. At the end of each day for two weeks, a convenience sample of American undergraduates described how they felt and how they thought about themselves that day, and they described the events that occurred to them that day. Multilevel modeling analyses (days nested within persons) found that vegetarians (individuals who avoided all meat and fish, n = 24) reported lower self-esteem, lower psychological adjustment, less meaning in life, and more negative moods than semi-vegetarians (individuals who ate some meat and/or fish, n = 56) and omnivores (individuals who did not restrict their intake of meat or fish, n = 323). Vegetarians also reported more negative social experiences than omnivores and semi-vegetarians. Although women were more likely than men to identify as vegetarians and semi-vegetarians, controlling for participant gender did not change the results of the analyses. The differences we found are consistent with other research that suggests that vegetarians are less psychologically well-adjusted than non-vegetarians. The implications of the present results for understanding relationships between dietary habits and well-being are discussed.
KEYWORDS: Daily diary, vegetarianism, well-being
ABSTRACT: The goal of the present study was to examine differences in the daily experiences of vegetarians and non-vegetarians. At the end of each day for two weeks, a convenience sample of American undergraduates described how they felt and how they thought about themselves that day, and they described the events that occurred to them that day. Multilevel modeling analyses (days nested within persons) found that vegetarians (individuals who avoided all meat and fish, n = 24) reported lower self-esteem, lower psychological adjustment, less meaning in life, and more negative moods than semi-vegetarians (individuals who ate some meat and/or fish, n = 56) and omnivores (individuals who did not restrict their intake of meat or fish, n = 323). Vegetarians also reported more negative social experiences than omnivores and semi-vegetarians. Although women were more likely than men to identify as vegetarians and semi-vegetarians, controlling for participant gender did not change the results of the analyses. The differences we found are consistent with other research that suggests that vegetarians are less psychologically well-adjusted than non-vegetarians. The implications of the present results for understanding relationships between dietary habits and well-being are discussed.
KEYWORDS: Daily diary, vegetarianism, well-being
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