Both in more hierarchical & patriarchal communities, 6 in less ones, men who were ranked as having more marital conflict with their spouses had higher testosterone than men in more harmonious relationships

Sharing and caring: Testosterone, fathering, and generosity among BaYaka foragers of the Congo Basin. Lee T. Gettler, Sheina Lew-Levy, Mallika S. Sarma, Valchy Miegakanda & Adam H. Boyette. Scientific Reports volume 10, Article number: 15422, September 22 2020. https://www.nature.com/articles/s41598-020-70958-3

Abstract: Humans are rare among mammals in exhibiting paternal care and the capacity for broad hyper-cooperation, which were likely critical to the evolutionary emergence of human life history. In humans and other species, testosterone is often a mediator of life history trade-offs between mating/competition and parenting. There is also evidence that lower testosterone men may often engage in greater prosocial behavior compared to higher testosterone men. Given the evolutionary importance of paternal care and heightened cooperation to human life history, human fathers’ testosterone may be linked to these two behavioral domains, but they have not been studied together. We conducted research among highly egalitarian Congolese BaYaka foragers and compared them with their more hierarchical Bondongo fisher-farmer neighbors. Testing whether BaYaka men’s testosterone was linked to locally-valued fathering roles, we found that fathers who were seen as better community sharers had lower testosterone than less generous men. BaYaka fathers who were better providers also tended to have lower testosterone. In both BaYaka and Bondongo communities, men in marriages with greater conflict had higher testosterone. The current findings from BaYaka fathers point to testosterone as a psychobiological correlate of cooperative behavior under ecological conditions with evolutionarily-relevant features in which mutual aid and sharing of resources help ensure survival and community health.

Discussion

A major goal of these analyses was to test for relationships between T and locally-defined measures of fathering quality in a small, egalitarian society. There has been limited past research on the biology of fatherhood in forager societies in which men are often committed to caring for their immediate families but are also contributors to the broader community’s pooled resources and shared engagement in collective caregiving36,38,39,52. We found that BaYaka fathers who were seen as better community sharers and those in less conflicted marriages, respectively, had lower T than their peers. Below, we contextualize our findings for BaYaka fathers and comparisons with their fisher-farmer Bondongo neighbors within theoretical frameworks and empirical research related to the psychobiology of family life, cooperative behavior, and competition/risk taking.

BaYaka fathering rankings and T

Consistent with our predictions, we found that BaYaka fathers who were ranked by their peers as being more generous sharers with the broader community had lower T than men who were seen as poorer sharers. Gettler has argued that one potential evolutionary and psychobiological implication of some men experiencing declines in T when they became committed fathers is that this might enhance their ability to cultivate social capital within their communities through greater cooperative and generous behavior9. This proposed neuroendocrine role of reduced paternal T fits within broader conceptual models that emphasize the importance of cooperation, reciprocal altruism, and empathy to the evolution of human life history13,14,26,32. Our finding for BaYaka fathers’ sharing is consistent with this framework. This result also had a meaningful, medium-level effect size (standardized B = -0.52) that well exceeds the effect sizes from recent meta-analyses on human T and fathering and past meta-analyses examining the positive associations between T, competition, and dominance behaviors7,53,54. To our knowledge no other research has specifically explored the relationship between fathers’ T and cooperative behavior, beyond nuclear family childcare roles9.

However, relevant research outside of family life has found that men with lower T commonly show greater generosity and empathic capacities10,11,12. Generally consistent with these patterns, a small number of recent studies have also found that lower T individuals have more social support, feel socially closer to others, and generate new friendships within social networks55,56,57. In contrast, experimental studies involving T administration have shown that men with elevated T will also circumstantially behave generously if such behavior helps increase social status58,59. In BaYaka communities, men are viewed positively for their generosity and likely gain benefits from community sharing (e.g. through reciprocity)60,61. Yet, in this egalitarian setting there are strong cultural values and practices geared towards reducing status hierarchy (see Methods)30,33,62. Thus, we suggest that our finding linking lower T and better sharing for BaYaka men aligns with social dynamics within their cultural context as well as past psychobiological research on T and generosity.

In our full models, BaYaka men who were ranked as better providers also tended to have lower T than men who were seen as poorer providers. This finding was not statistically significant and the effect was smaller (standardized B = -0.21), compared to the results for Share. This may reflect the strong positive relationship between men’s scores for Share and Provider and is potentially consistent with the idea that community members are basing BaYaka men’s rankings as providers at least partially on men’s sharing of acquired resources63. In addition, in multiple societies that still engage in foraging as a part of their routine subsistence, men who are better hunters often achieve some semblance of higher social status, despite egalitarian social norms, and hunting ability and reputation have been linked to higher fitness45. These competition- and status-related aspects of hunting in such societies could theoretically be linked to elevated T6,7,16. Indeed, among Amerindian Tsimane forager-horticulturalists men who achieved kills during hunts showed short-term increases in T, potentially reflecting these status-competition psychobiological effects37.

Meanwhile, in BaYaka communities, men who were skilled, successful elephant hunters (ntuma) are remembered historically as having had higher social standing in their communities. However, there were no ntuma in the community at the time of our data collection. Elephant hunting is now illegal and severely reduced in practice today and the importance of men’s hunting as a pathway to status is potentially attenuated in contemporary BaYaka communities. In comparison, local healers (nganga) and BaYaka council members remain prestigious positions within the contemporary community, and help foster cooperation through ceremony and conflict resolution64,65. Finally, we note that hunting is only one component of men’s provisioning in this setting, and our Provider ranking captures this broader breadth of subsistence activities, according to the participants’ characterizations30. Collectively, these issues help to highlight the relative dearth of studies on social neuroendocrine function among contemporary forager societies, limiting our ability to disentangle the importance of variation in status, cooperation and generosity, and paternal care in different societies36,38,39,52.

We also did not find a significant relationship between BaYaka men’s rankings as teachers and their T after adjustment for covariates. BaYaka fathers’ teaching involves direct interaction using a variety of behaviors, such as instruction and opportunity scaffolding66,67,68. Fathers have also been observed to do more teaching with very young children, whereas less of this “vertical transmission” from parents occurs for older children67,69. As direct caregivers, BaYaka fathers are often warm, nurturing, and patient33. This parenting style may be beneficial during teaching of young children and this type of nurturant direct care, especially with young children, is likely to be linked to lower paternal T, based on theory and past research elsewhere1,6,17,18. Thus the lack of a significant association and the relatively smaller effect size (standardized B = − 0.24) between men’s T and their teaching ran somewhat counter to our predictions. We do note that while teaching emerged as a locally-valued domain of fathering and may be significant for children developmentally70, BaYaka fathers may spend relatively less time engaged in teaching of their offspring, compared to other direct paternal care. For example, while Aka fathers were the second most important adult teachers of infants, their contribution was still much lower than those of mothers (12% vs. 59% of observed teaching). However, fathers’ teaching nearly exceeded all other adults combined (15%)66. Recent work by Lew-Levy and colleagues has shown that older BaYaka children and adolescents commonly accompany adults (not necessarily their parents) to forage71, and those trips afford opportunities for learning and teaching67,69. In future work, we hope to include further observational data on specific domains of men’s daytime direct care as well as family cosleeping, as these have been linked to lower or declining paternal T in multiple other settings20,22,23,24,25,72,73.

BaYaka and Bondongo fathering and T

Among BaYaka and Bondongo participants, there was a consistent emphasis that “good” fathers work to reduce conflict with their wives, as negative interactions between parents can lead to poor outcomes for children30,51,74. Despite this similar recognition of the importance of positive marital functioning in both societies, the two cultures have differing perceptions of the place of spousal conflict in day-to-day life, which align with broader cultural values in each community. Specifically, BaYaka are relatively gender egalitarian and value individual autonomy. They disapprove of conflict between wives and husbands and particularly have cultural mechanisms for attenuating and avoiding control of one partner over the other. Meanwhile, Bondongo communities are more hierarchical and patriarchal, thus men are generally higher in status and power than women, and disputes are seen as a part of normal day-to-day marital functioning30,51,74.

Based on these cultural differences, we predicted that Bondongo marital conflict would be more strongly related to men’s T than among BaYaka fathers. This prediction was not supported. Rather, we found a main effect for Dispute, such that men in both societies who were ranked as having more marital conflict with their spouses had higher T than men in more harmonious relationships. We also note that in the Dispute model focusing solely on BaYaka men we observed a complementary, stand alone finding relating greater marital conflict to higher T. These main effects potentially reflect that cultural variation in norms regarding the acceptability of marital conflict may have little effect on the actual frequency of such conflict. Our findings also align with findings elsewhere from a range of socio-ecological settings. For example, U.S. men with higher T reported that they felt less satisfied and committed to their relationships and had more marital conflict49,75, and in a large decade-long longitudinal U.S. study higher T men had greater risk of divorce48. Similarly, in a large longitudinal analysis from the Philippines, men with greater T functioning were more likely to experience relationship dissolution over a five-year period76. It is somewhat difficult to compare effect sizes across these varied studies. However, the bivariate correlation between marital conflict and men’s T in our combined sample (r = 0.33) is similar in size to the findings from Edelstein and colleagues’ (2014) research linking higher T to lower relationship satisfaction, investment, and commitment in the U.S. (rs = -0.29 to -0.36)49. In total, our findings add additional cross-cultural support to a growing body of literature linking higher T to poorer relationship functioning and outcomes in very different societies.

Finally, we did not find that the relationship between men’s Provider scores and T were significantly different between the two cultural groups. However, we do note that the slope of the lines relating men’s Provider rankings and T were in the opposite direction for men in the two communities (Bondongo: positive; BaYaka: negative). This reflects our past findings showing that Bondongo fathers who were rated as better providers had higher T than their peers77, and an opposite non-significant pattern linking lower T to higher Provider scores for BaYaka fathers in the present analyses. These patterns hint at the potential importance of cultural variation in social norms and complements foundational36 and recent39 anthropological work that similarly explored cross-cultural variation in fathers’ T.

Muller et al. (2009) found that Hadza forager fathers in Tanzania had lower T than non-fathers while among their Datoga pastoralist neighbors there was no significant difference for T between fathers and non-fathers. Building on this work, Alvarado et al. (2019) compared Hadza and Datoga men with Qom transitional foragers of Argentina. Relative to young Datoga fathers, Hadza and Qom men with children had lower T during their reproductive primes. The authors suggested that Datoga men’s elevated T as young fathers is particularly linked to the cultural practice of polygyny (i.e. involving competition) and the relative lack of routine contact between men and their families, due to men’s subsistence. Meanwhile, Qom and Hadza fathers more routinely engage in proximate interactions with their families and are generally serially monogamous39. In the present study, we need to be restrained in over-interpreting non-significant results. Yet, along this past research and other relevant work19,20,78, we hope our findings can help bring further attention to the potential importance of operationalizing cultural norms and practices in studies of social neuroendocrine function.

Limitations

There are limitations to the present study that merit attention. As we have discussed in past work from this study, our sample sizes of fathers were relatively small compared to some studies of paternal psychobiology in industrialized settings in more highly populated societies72,79,80,81,82. However, we also note that our pooled analyses (n = 45) and BaYaka sample size (n = 29) compare favorably to other recent work in this area25,72, especially research in similar societies39. That said, small sample sizes limit statistical power, as may have been the case in our moderation analyses predicting T from men’s provider rankings (Provider × ethnicity), and can also contribute to inflated effect sizes for statistically significant results83. While there has been substantial growth in the study of paternal psychobiology, much of the emerging research is in the U.S., Europe, and similar settings53,54. The present study makes an important, complementary contribution by focusing on these questions in two small-scale, subsistence-level societies, which differ politically, economically, and culturally from one another and from most prior study samples in this research area17. In that vein, as we have discussed in our past work from this site, smaller sample sizes are a research design trade-off that result from working at a highly remote field site with participants residing in small communities77. To that end, for each of the two communities, our sample of fathers represents ~ 90–100% of the eligible men in the village at the time of data collection. Moreover, to help attenuate sample size concerns, we collected repeated samples across participants and also used data analytical techniques that maximized the information from these repeated observations.

In addition, the BaYaka do not record their calendar ages, thus we estimated an approximate age based on a procedure from Diekmann and colleagues and with their assistance84. In validating their method, Diekmann et al. found the calculations were reliable within a year of known ages (median: 4 months; mean: 11 months) for another forager society, giving us confidence in the BaYaka calculated ages84. Still, because of inter-correlations between BaYaka age, T, and fathering rankings, the reliability of these age calculations could be potentially concerning in terms of adjusting our models for age. For BaYaka men, their calculated ages and T were qualitatively more strongly correlated (Rho = -0.46) than for the Bondongo (Rho = -0.34), who do record their ages. While populations can vary in age-related declines in T39,85, we suggest this is one helpful indicator of the validity of the calculated ages for BaYaka men. Moreover, the BaYaka age-T-rankings inter-correlations could pose potential issues for multi-collinearity for the independent variables in our regression models. Following each of our regression models, we calculated variance inflation factors (VIF) for the predictors. Although conventions can vary, it is common to use VIF of > 10 as an indicator of concerning multi-collinearity86, and the calculated values for the present analyses were well below this threshold, as we reported in the Results.

Finally, there was a minor unintended difference in the handling of the saliva samples our team collected from the participants in the two communities. During both field seasons (see Methods), we froze the saliva samples on site in portable liquid nitrogen dewars, and they remained frozen until shipment. The Bondongo samples were kept frozen throughout their transport to the U.S. During shipment of the BaYaka samples, we encountered a logistical problem, which resulted in the saliva samples going through a freeze–thaw cycle while in transit. All the BaYaka samples were exposed to identical conditions, and salivary T is generally robust to limited freeze–thaw cycles and short-term exposure to ambient temperature87,88, which attenuates concerns over this issue.

Trustworthiness in painted portraits increased over the period 1500–2000 paralleling the decline of interpersonal violence & the rise of democratic values; further analyses suggest association with increased living standards

Tracking historical changes in trustworthiness using machine learning analyses of facial cues in paintings. Lou Safra, Coralie Chevallier, Julie Grèzes & Nicolas Baumard. Nature Communications volume 11, Article number 4728, September 22 2020. https://www.nature.com/articles/s41467-020-18566-7

Abstract: Social trust is linked to a host of positive societal outcomes, including improved economic performance, lower crime rates and more inclusive institutions. Yet, the origins of trust remain elusive, partly because social trust is difficult to document in time. Building on recent advances in social cognition, we design an algorithm to automatically generate trustworthiness evaluations for the facial action units (smile, eye brows, etc.) of European portraits in large historical databases. Our results show that trustworthiness in portraits increased over the period 1500–2000 paralleling the decline of interpersonal violence and the rise of democratic values observed in Western Europe. Further analyses suggest that this rise of trustworthiness displays is associated with increased living standards.

IQ does not correlate with the number of brain cells in the human neocortex and was only weakly correlated to brain weight or the volume of key areas in the gray & white matter and of the cerebral ventricles

Is There a Correlation Between the Number of Brain Cells and IQ? Nicharatch Songthawornpong, Thomas W Teasdale, Mikkel V Olesen, Bente Pakkenberg. Cerebral Cortex, bhaa249, September 16 2020. https://doi.org/10.1093/cercor/bhaa249

Abstract: Our access to a unique material of postmortem brains obtained from decades of data collection enabled a stereological analysis of the neuron numbers and correlation of results with individual premorbid intelligence quotient (IQ) data. In our sample of 50 brains from men, we find that IQ does not correlate with the number of brain cells in the human neocortex and was only weakly correlated to brain weight. Our stereological examination extended to measures of several other parameters that might be of relevance to intelligence, including numbers of cerebral glial cells (astrocytes, oligodendrocytes, and microglia) and the volume of key areas in the gray and white matter and of the cerebral ventricles, also showing near-zero nonsignificant correlations to IQ.

Keywords: Børge Priens Prøve (BPP), cell numbers, human brain, intelligence quotient, stereology

Meta-analysis: Purchasing experiences buys greater happiness than purchasing material possessions, but mostly when consumed together with others and among the well-to-do

Re-examining the Experiential Advantage in Consumption: A Meta-Analysis and Review. Evan Weingarten, Joseph K Goodman. Journal of Consumer Research, ucaa047, September 16 2020. https://doi.org/10.1093/jcr/ucaa047

Rolf Degen's take: https://twitter.com/DegenRolf/status/1309342466831798272

Abstract: A wealth of consumer research has proposed an experiential advantage: consumers yield greater happiness from purchasing experiences compared to material possessions. While this research stream has undoubtedly influenced consumer research, few have questioned its limitations, explored moderators, or investigated filedrawer effects. This has left marketing managers, consumers, and researchers questioning the relevance of the experiential advantage. To address these questions, the authors develop a model of consumer happiness and well-being based on psychological needs (i.e., autonomy, relatedness, self-esteem, and meaningfulness), and conduct an experiential advantage meta-analysis to test this model. Collecting 360 effect sizes from 141 studies, the meta-analysis supports the experiential advantage (d = 0.383, 95% CI [0.336, 0.430]), of which approximately a third of the effect may be attributable to publication bias. The analysis finds differential effects depending on the type of dependent measure, suggesting that the experiential advantage may be more tied to relatedness than to happiness and willingness-to-pay. The experiential advantage is reduced for negative experiences, for solitary experiences, for lower socioeconomic status consumers, and when experiences provide a similar level of utilitarian benefits relative to material goods. Finally, results suggest future studies in this literature should use larger sample sizes than current practice.

Psychopathy is inversely associated with nature connectedness; high scoring on psychopathy was associated with a preference for inner-city living, but did not match residential history

Examining the connection between nature connectedness and dark personality. D. Fido et al. Journal of Environmental Psychology, September 24 2020, 101499. https://doi.org/10.1016/j.jenvp.2020.101499

Rolf Degen's take: https://twitter.com/DegenRolf/status/1309345665894567936

Highlights

• Psychopathy is inversely associated with nature connectedness.

• High scoring on psychopathy was associated with a preference for inner-city living, but did not match residential history.

• The nature-based IAT may not be a valid measure of implicit nature connectedness.

Abstract: The psychological construct of nature connectedness - the depth of an individual’s relationship with the natural world - has not only been associated with benefits for mental well-being but has also shown relationships with personality traits relevant to the dark personality literature. These include agreeableness, cognitive and affective empathy, and callous and uncaring traits. Across two independently-sampled studies we delineate relationships between explicit and implicit indices of nature connectedness and dark personality. In Study 1 (N = 304), psychopathy (and Machiavellianism) was associated with self-reported, but not implicitly-measured, nature connectedness. Moreover, individuals scoring high on dark personality exhibited a preference for inner-city, relative to suburban or rural living. In Study 2 (N = 209), we replicated the findings of Study 1 in relation to explicit measures of nature connectedness but did not find further relationships between dark personality and the population densities of where participants had previously lived. Limitations of implicit and pseudo indices of nature connectedness are outlined, and the results are discussed in relation to future research and the potential role of nature connectedness interventions in forensic populations. Data, syntax, and the manuscript pre-print are available here: [https://osf.io/3mg5d/?view_only=b5c7749d4a7945c5a161f0915a2d0259].

Keywords: Nature ConnectednessPsychopathyNarcissismMachiavellianismSadism

Motivated reasoning and policy information: Politicians are more resistant to debiasing interventions than the general public

Motivated reasoning and policy information: Politicians are more resistant to debiasing interventions than the general public. Julian Christensen & Donald P. Moynihan. Forthcoming in Behavioural Public Policy, accepted Aug 2020. https://pure.au.dk/portal/files/196718602/Accepted_manuscript_including_supplementary_materials.pdf

Abstract: A growing body of evidence shows that politicians use motivated reasoning to fit evidence with prior beliefs. In this, they are not unlike other people. We use survey experiments to reaffirm prior work showing that politicians, like the public they represent, engage in motivated reasoning. However, we also show that politicians are more resistant to debiasing interventions than others. When required to justify their evaluations, politicians rely more on prior political attitudes and less on policy information, increasing the probability of erroneous decisions. The results raise the troubling implication that the specialized role of elected officials makes them more immune to the correction of biases, and in this way, less representative of the voters they serve when they process policy information.

Keywords: Motivated reasoning, elite behavior, politicians, debiasing interventions, justification requirements, accountability

The brain: Evidence for improvement in personality & behavior following frontal polar & anterior dorsolateral prefrontal damage; both lesion location & premorbid functioning contribute to improvements

Neural correlates of improvements in personality and behavior following a neurological event. Marcie L. King et al. Neuropsychologia, Volume 145, August 2020, 106579. https://doi.org/10.1016/j.neuropsychologia.2017.11.023

Highlights

• Evidence for improvement in personality and behavior following a neurological event.

• Improvement related to frontal polar and anterior dorsolateral prefrontal damage.

• Both lesion location and premorbid functioning contribute to improvements.

Abstract: Research on changes in personality and behavior following brain damage has focused largely on negative outcomes, such as increased irritability, moodiness, and social inappropriateness. However, clinical observations suggest that some patients may actually show positive personality and behavioral changes following a neurological event. In the current work, we investigated neuroanatomical correlates of positive personality and behavioral changes following a discrete neurological event (e.g., stroke, benign tumor resection). Patients (N = 97) were rated by a well-known family member or friend on five domains of personality and behavior: social behavior, irascibility, hypo-emotionality, distress, and executive functioning. Ratings were acquired during the chronic epoch of recovery, when psychological status was stabilized. We identified patients who showed positive changes in personality and behavior in one or more domains of functioning. Lesion analyses indicated that positive changes in personality and behavior were most consistently related to damage to the bilateral frontal polar regions and the right anterior dorsolateral prefrontal region. These findings support the conclusion that improvements in personality and behavior can occur after a neurological event, and that such changes have systematic neuroanatomical correlates. Patients who showed positive changes in personality and behavior following a neurological event were rated as having more disturbed functioning prior to the event. Our study may be taken as preliminary evidence that improvements in personality and behavior following a neurological event may involve dampening of (premorbidly) more extreme expressions of emotion.

Keywords: PersonalityBehaviorLesionNeurological event

Smaller amygdala is associated with neuroticism, anxiety; it is not associated with depression symptoms

Smaller amygdala volume and increased neuroticism predict anxiety symptoms in healthy subjects: A volumetric approach using manual tracing. Yifan Hua et al. Neuropsychologia, Volume 145, August 2020, 106564. https://doi.org/10.1016/j.neuropsychologia.2017.11.008

Rolf Degen's take: https://twitter.com/DegenRolf/status/1309124354421272585

Highlights

• Findings linking amygdala volume to trait anxiety in healthy and anxiety groups are mixed.

• Discrepancies may be due to use of automated amygdala segmentation vs. manual tracing.

• Here, manually traced amygdala volume negatively correlated with neuroticism and trait anxiety.

• Neuroticism also mediated the association between amygdala volume and trait anxiety.

• Amygdala volume was not associated with depression symptoms.

Abstract: Volume reductions in the amygdala (AMY) have been found in patients with anxiety disorders, but findings are mixed in subclinical participants with high trait anxiety scores, in whom both reductions and increases in AMY volume have been identified. One potential reason for such discrepancies could be the employment of different methods to determine the AMY volume (i.e., manual tracing in psychiatric research vs. automated methods), in non-patient research. In addition to trait anxiety, smaller AMY volume has also been linked to neuroticism, a personality trait consistently linked to increased vulnerability to anxiety. However, it is not clear how AMY volume and neuroticism together may contribute to anxiety symptoms in healthy functioning. These issues were investigated in a sample of 46 healthy participants who underwent anatomical MRI scanning and completed questionnaires measuring trait anxiety and neuroticism. AMY volume was assessed using manual tracing, based on anatomical landmarks identified in each participant's anatomical image. First, smaller left AMY volume was linked to higher levels of neuroticism (p = .013) and trait anxiety (p = .024), which in turn were positively correlated with each other. Moreover, AMY volume had a significant indirect effect on trait anxiety through neuroticism (ab = − .009, 95% CI [− .019, − .002]). This effect was not bidirectional, as trait anxiety did not predict AMY volume through neuroticism. Collectively, these findings provide support for a brain-personality-symptom framework of understanding affective dysregulation, which may help inform the development of prevention and intervention paradigms targeting preservation of AMY volume and reduction of neuroticism, to protect against anxiety symptoms.

Keywords: AmygdalaNeuroticismTrait anxietyVolumeManual tracing

Information processing is widely influenced by the presence of others; the influence on cognitive processing extends from the sensitivity to others’ attention and action, their perceptions, perspectives, beliefs & goals

Altercentric Cognition: How Others Influence Our Cognitive Processing. Dora Kampis, Victoria Southgate. Trends in Cognitive Sciences, September 24 2020. https://doi.org/10.1016/j.tics.2020.09.003

Rolf Degen's take: https://twitter.com/DegenRolf/status/1309111875251122176

Highlights

.  Humans are altercentric: our information processing is widely influenced by the presence of other agents.

.  The influence of others on cognitive processing extends from the sensitivity to others’ attention and action, their perceptions, perspectives, and beliefs, even when our immediate goal is individual.

.  Altercentric effects range from short-term effects, such as motor mimicry, gaze cueing, and influence on perceptual sensitivity, to influences on semantic processing and short as well as long-term memory.

.  Altercentrism may function to align input across different individuals, thus facilitating interpersonal coordination, communication, group dynamics, and cumulative culture.

Abstract: Humans are ultrasocial, yet, theories of cognition have often been occupied with the solitary mind. Over the past decade, an increasing volume of work has revealed how individual cognition is influenced by the presence of others. Not only do we rapidly identify others in our environment, but we also align our attention with their attention, which influences what we perceive, represent, and remember, even when our immediate goals do not involve coordination. Here, we refer to the human sensitivity to others and to the targets and content of their attention as ‘altercentrism’; and aim to bring seemingly disparate findings together, suggesting that they are all reflections of the altercentric nature of human cognition.

Keywords: altercentrismsocial cognitionmirroringperspective takingself and otherattentional bias

Participants preferred to interact (being friends or developing a relationship) with an intelligent person regardless of whether or not that person was sexist

When sexism is not a problem: The role of perceived intelligence in willingness to interact with someone who is sexist. Elena Agadullina. The Journal of Social Psychology, Sep 22 2020. https://doi.org/10.1080/00224545.2020.1819187

Rolf Degen's take: https://twitter.com/DegenRolf/status/1309065848250826752

ABSTRACT: Two studies examined factors that would influence people’s preferences for interaction with a perpetrator of sexism. In Study 1 (n = 348), participants preferred to interact (being friends or developing a relationship) with an intelligent person regardless of whether or not that person was sexist. Study 2 (n = 614) replicated this finding and confirmed that where a perpetrator had a high level of intelligence, people were more willing to interact with them, regardless of the perpetrator’s sex and the perceived commission or non-commission of sexist behavior. Moreover, Study 2 provides evidence that participants’ hostile sexism beliefs are a significant covariate of a willingness to interact with unintelligent women. The results are discussed in terms of their implications for the understanding of person perception.

KEYWORDS: Sexism, intelligence, halo effect, person perception

Childhood violence exposure, but not social deprivation, was associated with reduced adolescent resting-state neural network density

Association of Childhood Violence Exposure With Adolescent Neural Network Density. Leigh G. Goetschius et al. JAMA Netw Open. 2020;3(9):e2017850, September 23, 2020. doi:10.1001/jamanetworkopen.2020.17850

Key Points

Question  Are violence exposure and social deprivation associated with person-specific patterns (heterogeneity) of adolescent resting-state functional connectivity?

Findings  In this cohort study of 175 adolescents, childhood violence exposure, but not social deprivation, was associated with reduced adolescent resting-state density of the salience and default mode networks. A data-driven algorithm, blinded to childhood adversity, identified youth with heightened violence exposure based on resting-state connectivity patterns.

Meaning  Childhood violence exposure appears to be associated with adolescent functional connectivity heterogeneity, which may reflect person-specific neural plasticity and should be considered in neuroscience-based interventions.

Abstract

Importance  Adverse childhood experiences are a public health issue with negative sequelae that persist throughout life. Current theories suggest that adverse childhood experiences reflect underlying dimensions (eg, violence exposure and social deprivation) with distinct neural mechanisms; however, research findings have been inconsistent, likely owing to variability in how the environment interacts with the brain.

Objective  To examine whether dimensional exposure to childhood adversity is associated with person-specific patterns in adolescent resting-state functional connectivity (rsFC), defined as synchronized activity across brain regions when not engaged in a task.

Design, Setting, and Participants  A sparse network approach in a large sample with substantial representation of understudied, underserved African American youth was used to conduct an observational, population-based longitudinal cohort study. A total of 183 adolescents aged 15 to 17 years from Detroit, Michigan; Toledo, Ohio; and Chicago, Illinois, who participated in the Fragile Families and Child Wellbeing Study were eligible for inclusion. Environmental data from birth to adolescence were collected via telephone and in-person interviews, and neuroimaging data collected at a university lab. The study was conducted from February 1, 1998, to April 26, 2017, and data analysis was performed from January 3, 2019, to May 22, 2020.

Exposures  Composite variables representing violence exposure and social deprivation created from primary caregiver reports on children at ages 3, 5, and 9 years.

Main Outcomes and Measures  Resting-state functional connectivity person-specific network metrics (data-driven subgroup membership, density, and node degree) focused on connectivity among a priori regions of interest in 2 resting-state networks (salience network and default mode) assessed with functional magnetic resonance imaging.

Results  Of the 183 eligible adolescents, 175 individuals (98 girls [56%]) were included in the analysis; mean (SD) age was 15.88 (0.53) years and 127 participants (73%) were African American. Adolescents with high violence exposure were 3.06 times more likely (95% CI, 1.17-8.92) to be in a subgroup characterized by high heterogeneity (few shared connections) and low network density (sparsity). Childhood violence exposure, but not social deprivation, was associated with reduced rsFC density (β = −0.25; 95% CI, −0.41 to −0.05; P = .005), with fewer salience network connections (β = −0.26; 95% CI, −0.43 to −0.08; P = .005) and salience network-default mode connections (β = −0.20; 95% CI, −0.38 to −0.03; P = .02). Violence exposure was associated with node degree of right anterior insula (β = −0.29; 95% CI, −0.47 to −0.12; P = .001) and left inferior parietal lobule (β = −0.26; 95% CI, −0.44 to −0.09; P = .003).

Conclusions and Relevance  The findings of this study suggest that childhood violence exposure is associated with adolescent neural network sparsity. A community-detection algorithm, blinded to child adversity, grouped youth exposed to heightened violence based only on patterns of rsFC. The findings may have implications for understanding how dimensions of adverse childhood experiences impact individualized neural development.

Discussion

Results from a predominantly understudied and underserved sample with high rates of poverty suggest that childhood violence exposure, but not social deprivation, is associated with adolescent neural circuitry. Data-driven analyses identified a subset of adolescents with heterogeneous patterns of connectivity (ie, few shared and many individual connections) in 2 key neural networks associated with salience detection, attention, and social-cognitive processes (ie, the SN and DMN).^7,8 This subgroup of adolescents was exposed to more violence in childhood than the other subgroup, whose patterns of neural connectivity were relatively more homogeneous (ie, had many connections in common), suggesting that violence exposure may lead to more person-specific alterations in neural circuitry. Beyond subgroups, network density within the SN and between the SN and DMN was sparse for adolescents with high violence exposure, likely due to few connections involving the right insula and the left IPL. These factors could not be accounted for by social deprivation, in-scanner motion, race, sex, pubertal development, current life stress, or maternal marital status or educational level at the time of the participant’s birth.

Findings regarding the neural network subgroups are noteworthy because the community detection algorithm within GIMME detected rsFC patterns in the brain from exposures that occurred at least 6 years earlier. Moreover, high childhood violence exposure in the subgroup characterized by neural heterogeneity likely reflects the person-specific outcomes of early adversity on the brain and suggests that research on the developmental sequelae of adverse childhood experiences should consider individual differences in neural compensatory responses to stress.¹⁷ Although it is important to replicate these findings in other samples, S-GIMME has reliably classified subgroups in empirical data,^40,45 and there is evidence from simulations that modeling connections at the subgroup level, in addition to the group level, improves the validity and reliability of results.⁴⁰

Considering the sample as a whole, results also suggest that violence exposure is associated with blunted connectivity within the SN and between the SN and DMN. As expected, the observed reduced SN density in adolescents with heightened childhood violence exposure differs from typical developmental patterns that show stronger rsFC within SN nodes and increased density of connections with hub regions, such as the anterior insula, as the brain matures.^8,16 It is difficult, however, to align the present findings with previous work that reported increased SN rsFC in trauma-exposed youth^9,10 because those samples were small, used different metrics of connectivity, and had different sample compositions. Moreover, the present sample was likely experiencing chronic adversity, and research from animal models of chronic stress proposes that, over time, the body’s stress response (eg, hypothalamic pituitary adrenal axis reactivity) becomes blunted or habituated to typical stressors.⁴⁷ Previous research on hypothalamic pituitary adrenal axis reactivity in this sample revealed a blunted cortisol response in adolescents with heightened childhood violence exposure,²⁸ and work in other high-risk samples showed blunted activation of the amygdala, an SN node, to threatening stimuli.^48,49 The present study expands this notion to the function of threat detection neural circuits, and future research should examine whether this is compensatory or even adaptive.

Beyond density, childhood violence exposure was associated with reduced node degree of the right anterior insula and left IPL. These results are consistent with the extant literature because the right anterior insula in the SN facilitates shifting between the DMN and central executive network,⁵⁰ which contributes to higher-level executive function.⁸ Moreover, early life stress has been linked to insular connectivity within the SN,⁹ DMN (specifically, the left IPL, which plays a role in working memory⁵¹), and other neural ROIs.⁵² These results also show differences in the way that the anterior insula is integrated within and between neural networks in youth exposed to violence in their homes and neighborhoods using longitudinal data from a population-based sample.

This study represents a person-specific approach to the neuroscientific investigation of the sequelae of early adversity. Past research on early adversity and rsFC assumed that the same connectivity patterns characterize all, or a majority of participants, but if this assumption is violated (as is likely the case in studies of diverse populations and biopsychosocial phenomena), then results may not accurately describe any individual.^18,53 The presence of group- and subgroup-level connections in the present study suggests that there is some consistency in the connections within and between the SN and DMN, aligning with an assumption of homogeneity that is prevalent in rsFC research, but the large number of individual-level connections, especially in adolescents with high levels of early violence exposure, show that there was also notable heterogeneity that required person-specific analyses to accurately reflect rsFC, encouraging future research using person-specific modeling approaches.

All significant findings concerned violence exposure, and there were no detected associations between social deprivation and rsFC. This set of results could indicate that social deprivation has a less salient influence on patterns of spontaneous neural fluctuations. Some studies have identified links between social deprivation and functional connectivity, but they concerned extreme, nonnormative deprivation (eg, previous institutionalization).^21,54 This deprivation may be qualitatively different from deprivation operationalized in the present study, and may operate through different mechanisms. In addition, because a hypothesis-driven approach to node selection was taken in this study, it is possible that deprivation is associated with rsFC of SN or DMN nodes not measured here, with other networks (eg, central executive), or in different populations (eg, with extreme or heightened variability of deprivation). It is also tenable that there are other dimensions of adversity that would have differential associations with rsFC (eg, those linked to emotionality), which future research should explore. Nonetheless, these findings present evidence for dimensional frameworks of adversity^5,55 because there were distinct neural correlates for violence exposure.

Limitations

This study had limitations. Based on the demographic characteristics of the sample (eg, 73% African American, born in Midwestern cities), it is not clear whether findings will generalize beyond low-income, urban, African American youth; nonetheless, the present work is important because these populations are often underrepresented in neuroimaging research and underserved by the medical community.¹² Resting-state functional MRI was collected on only a single occasion in adolescence; thus, it is unclear whether connectivity patterns reflect stable or changing neural features. In addition, it is not possible to know the direction of association (eg, whether neural differences predate exposure to adversity). Violence exposure and social deprivation composites were derived from parent reports. Exposures between the FFCWS collection waves at ages 9 and 15 years could not be accounted for in this study. Owing to changes in the FFCWS questionnaire at year 15, current adversity could not be controlled using the composite scores created for earlier ages.⁵ To compensate, a life stress scale was used as a covariate; however, that confounding variable did not impact associations. The ecologic pattern of poverty-related adversity is complex; thus, there are unmeasured variables that may explain these associations or contribute to cascades of risk (eg, parental psychopathologic factors).

Genetic differences in religiousness and extra-familial environmental influences increased with age, whereas shared environmental influences within families declined – in particular in the first half of life

 A meta-analytic review of nature and nurture in religiousness across the lifespan. Christian Kandler. Current Opinion in Psychology, September 23 2020. https://doi.org/10.1016/j.copsyc.2020.09.011

Rolf Degen's take: https://twitter.com/DegenRolf/status/1308988159901003786

Abstract: Behavior genetic research yielded that affiliation to a specific religion is primarily environmental, whereas religious beliefs and practices irrespective of a specific religion have been found to be heritable to some degree. This review synthesizes the literature and provides a meta-analytic overview on all identified behavior genetic studies on religiousness since 1999. This analysis allows new insight on the nature–nurture interplay in the development of religiousness: Genetic differences in religiousness and extra-familial environmental influences increased with age, whereas shared environmental influences within families declined – in particular in the first half of life. This age trend is in line with the interpretation of an increasing importance of active gene–environment transactions and accumulating extra-familial environmental factors across the lifespan.

Prevalent emotion‐theories of psychopathy appear to operate with the assumption that psychopaths have no emotions, leading to the hypothesis that psychopaths are (almost) completely unable to make moral judgments

Are psychopaths moral‐psychologically impaired? Reassessing emotion‐theoretical explanations. Rasmus Rosenberg Larsen. Mind & Language, September 22 2020. https://doi.org/10.1111/mila.12317

Rolf Degen's take: https://twitter.com/DegenRolf/status/1308793107358658563

Abstract: Psychopathy has been theorized as a disorder of emotion, which impairs moral judgments. However, these theories are increasingly being abandoned as empirical studies show that psychopaths seem to make proper moral judgments. In this contribution, these findings are reassessed, and it is argued that prevalent emotion‐theories of psychopathy appear to operate with the unjustified assumption that psychopaths have no emotions, which leads to the hypothesis that psychopaths are completely unable to make moral judgments. An alternative and novel explanation is proposed, theorizing psychopathy as a degree‐specific emotional deficiency, which causes degree‐specific differences in moral judgments.

No evidence that modern types of wheat have lower quality for human nutrition and health, with the exception of decreased levels of some minerals (including iron, zinc and magnesium)

Do modern types of wheat have lower quality for human health? P. R. Shewry  K. L. Hassall  H. Grausgruber  A. A. M Andersson  A.‐M. Lampi  V. Piironen  M. Rakszegi  J. L. Ward  A. Lovegrove. Nutrition Bulletin, September 22 2020. https://doi.org/10.1111/nbu.12461

Abstract: Wheat is the major staple food in Western Europe and an important source of energy, protein, dietary fibre, minerals, B vitamins and phytochemicals. Plant breeders have been immensely successful in increasing yields to feed the growing global population. However, concerns have been expressed that the focus on increasing yield and processing quality has resulted in reduced contents of components that contribute to human health and increases in adverse reactions. We review the evidence for this, based largely on studies in our own laboratories of sets of wheats bred and grown between the 18th century and modern times. With the exception of decreased contents of mineral micronutrients, there is no clear evidence that intensive breeding has resulted in decreases in beneficial components or increases in proteins which trigger adverse responses. In fact, a recent study of historic and modern wheats from the UK showed increases in the contents of dietary fibre components and a decreased content of asparagine in white flour, indicating increased benefits for health.

Discussion

It is clear from the studies discussed above that intensive wheat breeding has resulted in increased accumulation of starch, which is generally associated with a decrease in the concentration of protein. Analysis of the Austrian Heritage lines also indicates that there have not been increases in proteins known to trigger adverse reactions. Other effects of breeding on grain composition are less clear, and the studies discussed in detail here demonstrate the challenges.

One major challenge is that grain composition is strongly affected by the environment (Shewry et al. 2010). Hence, it is essential to compare material grown in replicated multi‐environment field trials. Furthermore, the varieties compared should be adapted to the area of growth, to avoid the effects of environmental stress. The HEALTHGRAIN study clearly did not fulfil these criteria, and it is not surprising that few correlations were observed, and, with the exception of starch and protein, these were marginal in significance (accounting for between 2% and 5% of the variation observed in the analyses). Nevertheless, the analyses are of interest in that they show no major changes in composition.

By contrast, the UK Heritage Wheat samples were from replicated multi‐site trials with an emphasis on flour composition. Statistical analyses of these samples showed positive correlations of release date with the contents of arabinoxylan fibre (accounting for 21% of the total variation), total sugars (41%) and betaine (19%), and negative correlations with total amino acids (15%) and individual amino acids including asparagine (Lovegrove et al. 2020). These changes have clear implications for human health.

Wheat is the most important single source of dietary fibre in many diets, including the UK and Western Europe, and the increased content of arabinoxylan (the major fibre component) in white flour is certainly desirable. The decreased concentration of asparagine in modern wheats is also desirable as it reduces the potential for the formation of acrylamide during processing.

By contrast, the increases in fermentable monosaccharides, disaccharides and oligosaccharides (sucrose, mannitol, fructans) may be of concern to consumers suffering from irritable bowel syndrome (IBS), as these form part of the FODMAP fraction (fermentable oligosaccharides, disaccharides, monosaccharides and polyols) that exacerbate IBS symptoms (Gibson & Shepherd 2010). However, wheat is already recognised as a major source of FODMAPs in the diet (Biesiekierski et al. 2011; Whelan et al. 2011) and excluded by many IBS patients.

To conclude, the analyses discussed provide no evidence that modern types of wheat have lower quality for human nutrition and health, with the exception of decreased levels of some minerals (including iron, zinc and magnesium) which are discussed elsewhere. In fact, there is evidence that they may be superior in some respects, particularly in fibre content of white flour. However, the analyses also show the challenges facing researchers and the need for more datasets from well‐designed field trials.