The development of adaptive conformity in young children: effects of uncertainty and consensus

Human culture relies on extensive use of social transmission, which must be integrated with independently acquired (i.e. asocial) information for effective decision‐making. Formal evolutionary theory predicts that natural selection should favor adaptive learning strategies, including a bias to copy when uncertain, and a bias to disproportionately copy the majority (known as ‘conformist transmission’). Although the function and causation of these evolved strategies has been comparatively well studied, little is known of their development. We experimentally investigated the development of the bias to copy‐when‐uncertain and conformist transmission in children from the ages of 3 to 7, testing predictions derived from theoretical models. Children first attempted to solve a binary‐choice quantity discrimination task themselves using asocial information, but were then given the decisions of informants, and an opportunity to revise their answer. We investigated whether children's revised judgments were adaptively contingent on (i) the difficulty of the trial and (ii) the degree of consensus amongst informants. As predicted, older but not younger children copied others more on more difficult trials than on easier trials, even though older children also showed a tendency to stick with their initial, asocial decision. We also found that older children, like adults, were disproportionately receptive to non‐total majorities (i.e. were conformist) whereas younger children were receptive only to total (i.e. unanimous) majorities. We conclude that, whilst the mechanism for incorporating social information into decision‐making is initially very blunt, across the course of early childhood it converges on the adaptive learning mechanisms observed in adults and predicted by cultural evolutionary theory. A video abstract of this article can be viewed at http://youtu.be/Qb6JINGYqVk     

Germline Manipulation and Our Future Worlds

Two genetic technologies capable of making heritable changes to the human genome have revived interest in, and in some quarters a very familiar panic concerning, so-called germline interventions. These technologies are: most recently the use of CRISPR/Cas9 to edit genes in non-viable IVF zygotes and Mitochondrial Replacement Therapy (MRT) the use of which was approved in principle in a landmark vote earlier this year by the United Kingdom Parliament. The possibility of using either of these techniques in humans has encountered the most violent hostility and suspicion. However it is important to be aware that much of this hostility dates back to the fears associated with In Vitro Fertilization (IVF) and other reproductive technologies and by cloning; fears which were baseless at the time concerning both IVF and cloning the use of both of which have proved to be highly beneficial to humanity and which have been effectively regulated and controlled. This paper argues that CRISPR should by pursued through researh until it is safe enough for use in humans but there is no reason to suppose at this stage that such use will be unsafe or unethical (Collins 2015).     

Mother and father socially desirable responding in nine countries: Two kinds of agreement and relations to parenting self‐reports

We assessed 2 forms of agreement between mothers' and fathers' socially desirable responding in China, Colombia, Italy, Jordan, Kenya, the Philippines, Sweden, Thailand and the United States (N = 1110 families). Mothers and fathers in all 9 countries reported socially desirable responding in the upper half of the distribution, and countries varied minimally (but China was higher than the cross‐country grand mean and Sweden lower). Mothers and fathers did not differ in reported levels of socially desirable responding, and mothers' and fathers' socially desirable responding were largely uncorrelated. With one exception, mothers' and fathers' socially desirable responding were similarly correlated with self‐perceptions of parenting, and correlations varied somewhat across countries. These findings are set in a discussion of socially desirable responding, cultural psychology and family systems.     

The heavy weight of death: how anti‐fat bias is affected by weight‐based group membership and existential threat

Anti‐fat bias is marked by a devaluation of overweight people compared with non‐overweight persons. Even though belonging to the same group, research on social identity theory (SIT) indicates that overweight people also devaluate overweight others. Merging insights from research on anti‐fat bias, SIT, and terror management theory, our study (n = 101) provides new insights on motivational aspects of anti‐fat bias by investigating the effects of existential threat on the evaluation of non‐overweight and overweight people. Results revealed that participants in the existential threat condition displayed in‐group bias: Participants perceiving themselves as non‐overweight showed more pronounced anti‐fat bias compared with participants in the non‐death threat condition. In contrast, participants perceiving themselves as overweight demonstrated less anti‐fat bias than controls.     

Relations Between Adolescent Ratings of Rothbart's Temperament Questionnaire and the HEXACO Personality Inventory

Conventionally, individual differences have been assessed using temperament measures for infants and children, and personality measures for adults. We chose to explore both temperament and personality to see whether a convergence exists specifically during adolescence. A sample of 225 adolescents completed Rothbart's Early Adolescent Temperament Questionnaire–Revised (EATQ–R), a 4-factor temperament scale, and the HEXACO Personality Inventory–Revised (HEXACO PI–R), a 6-factor personality scale. As hypothesized, we found significant relations between the 2 measures. However, there were some important differences between the 2 measures regarding Honesty–Humility, Openness, and Frustration that highlight the unique contributions of both instruments to understanding and measuring adolescent individual differences. As there is a relatively scant history of measuring temperament or personality in adolescence, it is sometimes difficult for researchers to decide which instrument is most appropriate. The results reported here suggest that either the EATQ–R or the HEXACO PI–R could be appropriate, depending on the specific research questions being asked.     

Double Jeopardy Upon Resumé Screening: When Achmed Is Less Employable Than Aïsha

Applicants belong to multiple categories (e.g., male, ethnic minority) and a complex set of factors affects category activation and inhibition when making hiring decisions. Two field experiments with recruiters who regularly engage in resumé screening showed that the role of multiple categories (applicants’ ethnicity and sex) in discrimination depended on job type and prejudice. Specifically, in both low‐ and high‐demand (i.e., complex) jobs, Arab women were rated more favorably than Arab men, particularly when considering levels of client contact. Across both studies, recruiters high in explicit ethnic prejudice were discriminatory only when applicants’ job qualifications fit the job position less, lending support for the attributional‐ambiguity effect. Implicit attitudes did not play a strong role. Our study findings point to the complex nature of multiple categorization effects in the hiring process. Implications are considered as to how to avert hiring discrimination during resumé screening.