Do Perceiver Effects in Interpersonal Perception Predict Cooperation in Social Dilemmas?

Behavioral determinants of antibiotic resistance: The role of social information

The increasing development of resistant pathogens is one of the greatest global health challenges. As antibiotic overuse amplifies antibiotic resistance, antibiotic intake poses a social dilemma in which individuals need to decide whether to prosocially reduce their intake in the collective interest versus to (over)use it even in case of mild diseases. We devise a novel behavioral game paradigm to model the social dilemma of antibiotic intake. Using this new method in an incentivized laboratory experiment (N = 272 German participants), we varied whether players had mutual knowledge about their antibiotic intake. The results indicate that there was substantial antibiotic overuse in the absence of social information. Overuse decreased when social information was present. Our postexperimental survey data further suggest that social information impacts people's behavioral motivation, evaluation of the other player, and positive affect. Taken together, providing social information about people's antibiotic intake may help in reducing antibiotic overuse. On a more general level, the novel behavioral game may be adapted to study other aspects of antibiotic intake to promote prudent use of antibiotics.

Perceiver Effects in First Impressions Reflect Generalized Stereotypes: Evidence of Consistency Across Time, Groups, and Contexts

In interpersonal perception, perceivers’ tendencies for judging the average target (perceiver effects) are commonly assumed to reflect generalized stereotypes about “the other.” This is empirically supported by findings of consistent rank-orders of perceiver effects across measurement occasions, but previous studies could not rule out important alternative explanations for consistency. Here, we present a strict test of the generalized stereotype account in two studies ( ns 146 and 295) in which participants provided mutual impressions in distinct, uniquely composed groups. Results reveal that perceiver effects are quite consistent on the level of global evaluation and acquiescence but less consistent on the level of specific trait- or item-content. The finding that perceivers who saw others in globally positive or negative ways in one situation also saw other targets in similar ways in entirely different situations across time, groups, and contexts is strong evidence for the generalized stereotype account and has vital implications.