Suchergebnisse

Despite recent progress in promoting gender equality, gender bias continues to post challenges to women's career advancement. Here, we use a statistically grounded framework to investigate how face-based social perception may contribute to gender biases in political and job application settings. By analyzing a large face dataset and performing a novel behavioral experiment, we find that: 1) female faces exhibit stronger anti-correlation between perceived trustworthiness and dominance, 2) this anti-correlation is due to distinct sets of facial features humans utilize to assess female and male faces for trustworthiness and dominance, 3) perceived dominance positively contributes to social decision preferences for female faces, contrary to prior suggestions that perceived dominance affects female candidates negatively, and 4) the anti-correlated perception of trustworthiness and dominance put females at a disadvantage in competitive environments. More generally, our findings reveal the important role of face-based trait perceptions underlying gender biases in social decision making.

Abstract
There is increasing evidence for the role of the gut microbiome in the regulation of socio-affective behavior in animals and clinical conditions. However, whether and how the composition of the gut microbiome may influence social decision-making in health remains unknown. Here, we tested the causal effects of a 7-week synbiotic (vs. placebo) dietary intervention on altruistic social punishment behavior in an ultimatum game. Results showed that the intervention increased participants' willingness to forgo a monetary payoff when treated unfairly. This change in social decision-making was related to changes in fasting-state serum levels of the dopamine-precursor tyrosine proposing a potential mechanistic link along the gut–microbiota–brain-behavior axis. These results improve our understanding of the bidirectional role body–brain interactions play in social decision-making and why humans at times act "irrationally" according to standard economic theory.

"In social decision making, punishing non-cooperation and rewarding cooperation may not only affect cooperation because of instrumental reasons. They may also evoke moral concerns regarding cooperation as they signal that cooperation is socially approved of and non-cooperation socially disapproved of. I argue that punishments do this to a greater extent than rewards as punishments communicate an obligatory rule and rewards communicate a voluntary rule. Indeed, the first experiment shows that, in a social dilemma, the concept of punishment increased cooperation and the concept of a reward did not. The second experiment showed that participants showed more disapproval towards an offender when there was a punishment for non-compliance than when there was a reward for compliance. These findings suggest that punishing non-cooperation more strongly foster moral concerns regarding cooperation than rewarding cooperation. Possible implications for internalizations are discussed." (author's abstract)