Effects of Prenatal Social Stress on Offspring Development: Pathology or Adaptation?

ABSTRACT— In nonhuman mammals, the social environment in which pregnant females live is critical for their offsprings' brain development, endocrine state, and social and sexual behavior later in life. Social instability during pregnancy generally brings about a behavioral and neuroendocrine masculinization in daughters and a less pronounced expression of male-typical traits in sons. We favor the hypothesis that such behavioral effects of prenatal social stress are not necessarily "pathological" (nonadaptive) consequences of adverse social conditions. Rather, pregnant mothers could be adjusting their offspring to their environment in an adaptive way.     

Psychological mechanisms underlying the Köhler motivation gain

Sometimes group work conditions lead to motivation gains rather than to social loafing. Two theoretical explanations for the K?hler motivation gain effect are identified, one stressing social comparison and a second stressing the indispensability of one's effort to the group. The results of three new experiments are reported. Experiment 1 suggested that both explanations are valid and contribute to the K?hler effect. Prior studies suggested that there might be gender differences in the relative importance of these two explanatory processes. Experiment 2 confirmed this suggestion. In Experiment 3, the gender difference was eliminated by priming women with a goal (viz., competition) presumed to be chronically more important to men. It is argued that the relative importance of these two motivational processes will depend on the immediate and chronic importance attached to more personal (viz., to achieve a favorable social comparison) versus collective (viz., to contribute to one's group) goals.     

Cognitive accessibility of sex role concepts and attitudes toward political participation: The impact of sexist advertisements

Women who were exposed to advertisements that portrayed women in their traditional role as homemakers reported less favorable attitudes toward political participation than women who were not exposed to advertisements. Exposure to portrayals of women as sex objects, on the other hand, did not affect women's attitudes. In contrast, men reported less favorable attitudes toward political participation after exposure to advertisements that portrayed women as sex objects, but were not affected by portrayals of women as homemakers. Implications for the influence of sex roles on political participation and the impact of sexist advertisements are discussed.     

To compete or to cooperate? Values' impact on perception and action in social dilemma games

Two studies investigated how values affect competitive versus cooperative behavior. Each Study presented a new social‐dilemma game, in which participants' interpretations of the dilemma (i.e., their subjective payoff matrix)—and consequently the dominant (i.e., rational) behavioral choice—depended on their values. The Paired Charity Game (Study 1) framed the situation in terms of cooperation. As hypothesized, contribution correlated positively with universalism and benevolence values that reflect concern for others and negatively with power, achievement, and hedonism values that promote self‐interests. Furthermore, values, but not traits, predicted the participants' contribution. The Group Charity Game (Study 2) was designed to frame the situation in terms of competition. As hypothesized, contribution correlated positively with emphasizing benevolence over power values. Moreover, the impact of values was stronger when they were rendered accessible, indicating a causal influence of values on behavior. Furthermore, when their value hierarchy was rendered accessible, participants explained their choices in terms of those values that were (a) important to them and (b) relevant to the situation. The findings thus point to the mechanism through which accessible values affect behavior. Taken together, the studies promote our understanding of the value–behavior relationships, by highlighting the impact of values on perception. Copyright © 2010 John Wiley & Sons, Ltd.