Behavioral genetics and cultural evolution have both revolutionized our understanding of human behavior – largely independent of each other. Here, we reconcile these two fields under a dual inheritance framework, offering a more nuanced understanding of the interaction between genes and culture. Going beyond typical analyses of gene–environment interactions, we describe the cultural dynamics that shape these interactions by shaping the environment and population structure. A cultural evolutionary approach can explain, for example, how factors such as rates of innovation and (...) diffusion, density of cultural subgroups, and tolerance for behavioral diversity impact heritability estimates, thus yielding predictions for different social contexts. Moreover, when cumulative culture functionally overlaps with genes, genetic effects become masked, unmasked, or even reversed, and the causal effects of an identified gene become confounded with features of the cultural environment. The manner of confounding is specific to a particular society at a particular time, but a WEIRD (western, educated, industrialized, rich, and democratic) sampling problem obscures this boundedness. Cultural evolutionary dynamics are typically missing from models of gene-to-phenotype causality, hindering generalizability of genetic effects across societies and across time. We lay out a reconciled framework and use it to predict the ways in which heritability should differ between societies, between socioeconomic levels, and other groupings within some societies but not others, and over the life course. An integrated cultural evolutionary behavioral genetic approach cuts through the nature–nurture debate and helps resolve controversies in topics such as IQ. (shrink)

Research suggests a direct negative relationship between peers’ unethical behavior and employees’ ethical intention. But several possible mechanisms might explain this relationship in more detail. For example, Machiavellianism is a personality trait characterized by interpersonal manipulation and the use of unethical means to achieve certain self‐interested ends, whether useful or pleasant. This article adopts an Aristotelian understanding of philia, related to three goods on which human relationships rest: useful, pleasant, and honest. We propose that Machiavellianism, a self‐interested, pragmatic personality orientation, (...) might explicate the relationship between peers’ unethical behavior and ethical intention. The results of a structural equation model applied to a sample of 436 banking employees in Spain reveals that Machiavellianism partially mediates the relationship between peers’ unethical behavior and employees’ ethical intention. We also find that with a greater level of peers’ unethical behavior, the negative effect of Machiavellianism on ethical intention increases, and that when peers’ unethical behavior is nonexistent, the negative effect of Machiavellianism on ethical intention disappears. These findings advance current literature by revealing that unethical peers can indirectly influence ethical intention, through shaping Machiavellianism. Our study is also the first to show that pairing high Machiavellians with ethical peers can help to cancel out the negative influence of Machiavellianism on ethical intention. (shrink)

How much can we shape the emotions we experience? Or to put it another way, how plastic are our emotions? It is clear that the exercise of identifying the degree of plasticity of emotion is futile without a prior specification of what can be plastic, so we first propose an analysis of the components of emotions. We will then turn to empirical data that might be used to assess the degree of plasticity of emotions.

Using samples from three diverse populations, we test evolutionary hypotheses regarding how people reason about the inheritance of various traits. First, we provide a framework for differentiat-ing the outputs of mechanisms that evolved for reasoning about variation within and between biological taxa and culturally evolved ethnic categories from a broader set of beliefs and categories that are the outputs of structured learning mechanisms. Second, we describe the results of a modified “switched-at-birth” vignette study that we administered among children and adults (...) in Puno, Yasawa, and adults in the United States. This protocol permits us to study perceptions of prenatal and social transmission pathways for various traits and to differentiate the latter into vertical versus horizontal cultural influence. These lines of evidence suggest that people use all three mechanisms to reason about the distribution of traits in the population. Participants at all three sites develop expectations that morphological traits are under prenatal influence, and that belief traits are more culturally influenced. On the other hand, each population holds culturally specific beliefs about the degree of social influence on non-morphological traits and about the degree of vertical transmission—with only participants in the United States expecting parents to have much social influence over their children. We reinterpret people's differentiation of trait transmission pathways in light of humans' evolutionary history as a cultural species. (shrink)

This paper provides a roadmap for engaging in cross-cultural, developmental research in practical, ethical, and community-engaged ways. To cultivate the flexibility necessary for conducting cross-cultural research, we structure our roadmap as a series of questions that each research program might consider prior to embarking on cross-cultural examinations in developmental science. Within each topic, we focus on the challenges and opportunities inherent to different types of study designs, fieldwork, and collaborations because our collective experience in conducting research in multiple cultural contexts (...) has taught us that there can be no single “best practice”. Here we identify the challenges that are unique to cross-cultural research as well as present a series of recommendations and guidelines. We also bring to the forefront ethical considerations which are rarely encountered in the laboratory context, but which researchers face daily while conducting research in a cultural context which one is not a member. As each research context requires unique solutions to these recurring challenges, we urge researchers to use this set of questions as a starting point, and to expand and tailor the questions and potential solutions with community members to support their own research design or cultural context. This will allow us to move the field towards more inclusive and ethical research practices. (shrink)

In this study, I examined what channels of socialization influence the moral behavior of cadets. We conducted a regression analysis of the effects of parents' attitudes to moral education, the standard and potential curriculum of schools, peer groups, and communication media on individual ethics and discipline using 399 sample participants. The participants were recruited through a questionnaire survey on cadets from academy of military, naval, and air force, and four-year based students from R.O.C. National Defense University. The analysis results showed (...) that the cultivation of morality among cadets was directly influenced by the school's potential curriculum (i.e., intern cadres and officers in company) and their parents' attitudes to moral education during early childhood. The results also indicated that the influence of teaching by example was more significant than that of teaching by precept. (shrink)

Research seeking to explain the perpetration of violence and atrocities by humans against other humans offers both social and individualistic explanations, which differ namely in the roles attributed to empathy. Prominent social models suggest that some manifestations of inter-human violence are caused by parochial attitudes and obedience reinforced by within-group empathy. Individualistic explanations of violence, by contrast, posit that stable intra-individual characteristics of the brain and personality of some individuals lead them to commit violence and atrocities. An individualistic explanation argues (...) that the chief cause of violence is the perpetrator’'s lack of empathy with the victim. To offer the rudiments of a critique of the individualistic approach, I critically examine a model stating that violence is caused by empathy erosion. Specifically, the discussion of the empathy-erosion model is applied to the case of honour-based violence, a type of violence known for its communal character. Building from prior enquiries into violence and social cognition, I argue that an empathy-erosion explanation of HBV is defective because it does not consider important cultural and historical enablers of violence. Finally, as an alternative to individualism, I propose a psychohistorical approach to HBV in the migration context. This alternative combines psychological and philosophical enquiry with historical and ethnographical analysis. The psychohistorical approach hypothesises that distinct processes of cultural learning of honour codes both scaffold HBV and modulate the perpetrators’ emotions and empathy. (shrink)

BackgroundSocial cognition and competence are a key part of daily interactions and essential for satisfying relationships and well-being. Pediatric neurological and psychological conditions can affect social cognition and require assessment and remediation of social skills. To adequately approximate the complex and dynamic nature of real-world social interactions, innovative tools are needed. The aim of this study was to document the performance of adolescents on two versions of a serious video game presenting realistic, everyday, socio-moral conflicts, and to explore whether their (...) performance is associated with empathy or sense of presence, factors known to influence social cognition.MethodsParticipants first completed a pre-test measure of socio-moral reasoning based on three dilemmas from a previously validated computer task. Then, they either played an evaluative version or an adaptive version of a video game presenting nine social situations in which they made socio-moral decisions and provided justifications. In the evaluative version, participants’ audio justifications were recorded verbatim and coded manually to obtain a socio-moral reasoning maturity score. In the adaptive version, tailored feedback and social reinforcements were provided based on participant responses. An automatic coding algorithm developed using artificial intelligence was used to determine socio-moral maturity level in real-time and to provide a basis for the feedback and reinforcements in the game. All participants then completed a three-dilemma post-test assessment.ResultsThose who played the adaptive version showed improved SMR across the pre-test, in-game and post-test moral maturity scores, F = 9.81, pHF < 0.001, ϵ2 = 0.21, but those who played the Evaluative version did not. Socio-moral reasoning scores from both versions combined did not correlate with empathy or sense of presence during the game, though results neared significance. The study findings support preliminary validation of the game as a promising method for assessing and remediating social skills during adolescence. (shrink)

We examine the opportunities children have for interacting with others and the extent to which they are the focus of others’ visual attention in five societies where extended family communities are the norm. We compiled six video-recorded datasets collected by a team of anthropologists and psychologists conducting long-term research in each society. The six datasets include video observations of children among the Yasawas, Tanna, Tsimane, Huatasani, and Aka. Each dataset consists of a series of videos of children ranging in age (...) from 2 months to 12 years in their everyday contexts. We coded 998 videos and identified with whom children had opportunities to interact as well as the number of individuals and the proportion of observed time that children spent with these individuals. We also examined the proportion of time children received direct visual gaze. Our results indicate that children less than 5 years old spend the majority of their observed time in the presence of one female adult. This is the case across the five societies. In the three societies from which we have older children, we find a clear shift around 5 years of age, with children spending the majority of their time with other children. We also coded the presence or absence of a primary caregiver and found that caregivers remained within 2 ft of target children until 7 years of age. When they were in the company of a primary caregiver, children older than seven spent the majority of their time more than 2 ft from the caregiver. We found a consistent trend across societies with decreasing focal attention on the child with increasing child age. These findings show remarkable consistency across these societies in children’s interaction opportunities and that a developmental approach is needed to fully understand human development because the social context is dynamic across the lifespan. These data can serve as a springboard for future research examining social development in everyday contexts. (shrink)

Several researchers have proposed that humans are predisposed to treat ethnic identities as stable and inherent. However, the ethnographic, historical, and genetic records attest to the ubiquity of inter-ethnic migrations across human history. These two claims seem to be at odds. In this article we compare three evolutionary accounts of how people reason about identity stability, and the effect that the cultural evolution of ethnic group boundaries may have on these beliefs. We test our hypotheses among Himba pastoralists in Namibia, (...) whose recent fission from the neighboring Herero makes them ideal for studying the effect of cultural distance on folk beliefs about identity stability. In a vignette experiment, we asked participants whether an individual born in one group who moved to another group would retain their original group membership and cultural characteristics or acquire those of the new group. Across vignette conditions we examine the importance of the direction of migration, parental social influence, and age at migration on perceptions of identity stability. We also compare participant responses to two out-groups, the Herero, and the more distantly related Damara. We find that participants seldom thought of identity as stable or fixed at birth. Furthermore, we show that cultural distance and endogamous preferences are independent of beliefs of identity stability. Himba believed the Damara character was more likely to change identity and cultural traits than was the Herero character, despite their greater cultural distance from the former group, and despite the fact that all participants expressed more anti-Damara than anti-Herero sentiment. (shrink)

The well-established finding that siblings growing up in the same family turn out to be very different from one another has puzzled psychologists and behavior geneticists alike. In this theoretical note we describe the possible ontogeny and phylogeny of a sibling differentiation mechanism. We suggest that sibling competition for parental investment results in sibling differentiation on a number of characteristics, producing different developmental trajectories within families. Variations in developmental trajectories within families may have had fitness advantages in ancestral environments because(a) (...) sibling competition for extrafamilial resources would be reduced and(b) these variations would be suited to environments containing a variety of niches or to changing environments. Predictions derived from this model and an example of an application to attachment theory are presented. (shrink)

The dynamics of knowledge transmission and acquisition, or how different aspects of culture are passed from one individual to another and how they are acquired and embodied by individuals, are central to understanding cultural evolution. In small-scale societies, cultural knowledge is largely acquired early in life through observation, imitation, and other forms of social learning embedded in daily experiences. However, little is known about the pathways through which such knowledge is transmitted, especially during middle childhood and adolescence. This study presents (...) new empirical data on cultural knowledge transmission during childhood. Data were collected among the Baka, a forager-farmer society in southeastern Cameroon. We conducted structured interviews with children between 5 and 16 years of age about group composition during subsistence activities. Children’s groups were generally diverse, although children tended to perform subsistence activities primarily without adults and with same-sex companions. Group composition varied from one subsistence activity to another, which suggests that the flow of knowledge might also vary according to the activity performed. Analysis of the social composition of children’s subsistence groups shows that vertical and oblique transmission of subsistence-related knowledge might not be predominant during middle childhood and adolescence. Rather, horizontal transmission appears to be the most common knowledge transmission strategy used by Baka children during middle childhood and adolescence, highlighting the importance of other children in the transmission of knowledge. (shrink)

Most Enlightenment thinkers believed that the World’s order (as ultimately based on divine laws) is good and thus every gain of knowledge will have good consequences. Scientific process was assumed to entail moral progress. In fact some moral progress did occur in the Western civilization and science contributed to it, but it is widely incommensurate with the progress of science. The Enlightenment’s concept of a concerted scientific and moral progress proved largely wrong for several reasons. (1) Public morality and science (...) evolve largely independently and may either enhance or inhibit each other. (2) There are no objective values to be read in the World’s order and simply followed. Instead, our real, subjective values and the moral systems they fuel have all been generated and shaped by evolution rather than designed to be universally good, and thus ought to be managed rather than simply followed. (3) Our evolved morality is flawed, deficient, prone to doctrinal manipulation and refractory to progress. (4) The majority of people show metaethical incompetence in failing to take a reasoned critical stand toward the principles and assumptions of received morals. This makes moral progress largely dependent on those who reach metaethical competence by transcending the conventional stages of moral development. (shrink)

The current study uses a two-wave longitudinal survey to explores the influence mechanism of the family environment on adolescents’ academic achievement. The family environment is measured by parents and children’s reports, including family atmosphere, parent–child interaction, and family rules, to reveal the mediating effect of adolescents’ positive or negative peers between the family environment and academic achievement, and whether the gap between self- and parental educational expectation plays a moderating effect. This study uses the data of the China Education Panel (...) Study ; the survey samples include 9,449 eighth-grade students, establishing a multilevel moderated mediating effect model. The results showed the family environment and peer interaction quality can positively predict adolescents’ academic achievement. Using the KHB test, peer interaction quality plays a partial mediating role in the process of family environment positively affecting academic achievement, and the mediating ratio is 27.5%. The educational expectation gap moderates the effect of the family environment on academic achievement and also on peer interaction quality. Therefore, from the perspective of environment and important others, to correctly grasp the academic achievement of junior high school students in the process of socialization, it is necessary to recognize that the family environment, peer interaction quality, and educational expectation gap play an important role. (shrink)

Considerable interest has long existed in two separate phenomena of considerable social interest, namely children’s early exposure to employment outside of any organizational, legislative, or collective bargaining protection, and teenage smoking. We used data from a large national survey to address possible direct and indirect links between children’s early employment intensity and smoking because of significant long-term implications of the link between work and well-being in a vulnerable population. Fifth to ninth grade children’s informal employment intensity was related to both (...) smoking history and smoking intent, and these effects were partially mediated by the amount of weekly spending money and self-esteem. The number of one’s parents and friends who smoke separately moderated the relationships between self-esteem and weekly spending money, and smoking behavior. These findings illustrate the complex consequences of young children’s exposure to early employment, and emphasize the need for research on the ethical implications of pre- and early teenagers who are employed outside of the formal employment context. (shrink)

Development of interpersonal trust among children and adolescents The main purpose of the present article is to introduce a topic related to the development of interpersonal trust among children and adolescents. Although this subject, since the beginnings of psychology considered as an academic discipline, has been regarded as an essential component of human functioning, there are still very few theoretical and empirical studies that approach the issue from a developmental point of view. In this paper the three-dimensional conceptualization of interpersonal (...) trust is provided. Furthermore, the article highlights the past and current theoretical and empirical research on the development of interpersonal trust in infants, preschool and school-age children. Finally, some challenges are presented in the field of interpersonal trust studies. (shrink)

This study investigated the characteristics and development of peer support networks in an effort to unravel the role of friendship in this developmental process. The relationships between friendship networks and peer support networks were explored, and the influence of dyadic and triadic friendships on the development of peer support relationships was examined. Two waves of data were collected among a sample of adolescents in six Chinese junior high schools (n= 913 students from 28 classrooms; mean age = 14.13 years; 50.49% (...) boys), and classroom friendship networks and peer support networks were analyzed. The results showed that peer support networks were sparse, hierarchical, and sex-segregated. Furthermore, peer support networks and friendship networks partially overlapped. Friends tended to have similar support-seeking and support-providing ties. Longitudinal multiplex social network analysis revealed that peer support networks changed moderately over time, and friendships played various roles in the development of peer support networks. Dyadic friendships improved the formation of peer support ties. A mutual friend improved the formation of support relationships between two students when the mutual friend chose the two students as friends, but a mutual friend also hindered or had no effects on the formation of support relationships in other cases. The implications for educators to improve peer support networks are presented, and directions for future research are discussed. (shrink)

Empathy is essential for healthy relationships and overall well-being. Affective empathy is the emotional response to others’ distress and can take two forms: personal distress or empathic concern. In Western cultures, high empathic concern and low personal distress have been implicated in increased prosocial behaviour and better emotion management and peer relations. Various factors have been examined with respect to affective empathy, but the role of culture has received little attention. Previous work suggests that children from East Asian cultures compared (...) to those from Western cultures experience greater personal distress and less empathic concern, but no work has specifically examined these differences in adolescents or individuals who identify as ‘bicultural’. The current research examines cultural differences in affective empathy using the Interpersonal Reactivity Index in an adolescent and young adult sample and examines how empathy relates to social-emotional health in bicultural individuals. Consistent with research on children, East Asian adolescents reported greater personal distress and less empathic concern than their Western counterparts. The bicultural individuals’ scores fell in between the East Asian and Western groups, but revealed significant differences from their ‘uni-cultural’ peers, demonstrating shared influences of community and family. Importantly, however, the relationship between affective empathy and social-emotional health in bicultural individuals was the same as for Western individuals. The current results provide an important first step in understanding the different cultural influences on empathic responding in a previously understudied population ‐ bicultural individuals. (shrink)