Mutual support in games: Some properties of Berge equilibria

The Berge equilibrium concept formalizes mutual support among players motivated by the altruistic social value orientation in games. We prove some basic results for Berge equilibria and their relations to Nash equilibria, and we provide a straightforward method for finding Berge equilibria in n-player games. We explore some specific examples, and we explain how the Berge equilibrium provides a compelling model of cooperation in social dilemmas. We show that the Berge equilibrium also explains coordination in some common interest games and is partially successful in explaining the payoff dominance phenomenon, and we comment that the theory of team reasoning provides alternative solutions to these problems.     

Social power facilitates the effect of prosocial orientation on empathic accuracy

Power increases the tendency to behave in a goal-congruent fashion. Guided by this theoretical notion, we hypothesized that elevated power would strengthen the positive association between prosocial orientation and empathic accuracy. In 3 studies with university and adult samples, prosocial orientation was more strongly associated with empathic accuracy when distinct forms of power were high than when power was low. In Study 1, a physiological indicator of prosocial orientation, respiratory sinus arrhythmia, exhibited a stronger positive association with empathic accuracy in a face-to-face interaction among dispositionally high-power individuals. In Study 2, experimentally induced prosocial orientation increased the ability to accurately judge the emotions of a stranger but only for individuals induced to feel powerful. In Study 3, a trait measure of prosocial orientation was more strongly related to scores on a standard test of empathic accuracy among employees who occupied high-power positions within an organization. Study 3 further showed a mediated relationship between prosocial orientation and career satisfaction through empathic accuracy among employees in high-power positions but not among employees in lower power positions. Discussion concentrates upon the implications of these findings for studies of prosociality, power, and social behavior.     

Fitting in but getting fat: identity threat and dietary choices among U.S. immigrant groups

In two experiments, we tested the hypothesis that pressure felt by U.S. immigrant groups to prove they belong in America causes them to consume more prototypically American, and consequently less healthy, foods. Asian Americans were three times more likely to report a prototypically American food as their favorite after being asked whether they spoke English than when they had not been asked; in contrast, questioning the English abilities of White Americans had no effect on their reports (Experiment 1). Also, Asian Americans ordered and ate dishes that were more American and contained an average of 182 additional calories and 12 extra grams of fat when their American identity was directly challenged than when their American identity was not challenged (Experiment 2). Identity-based psychological processes may help explain why the diets of U.S. immigrant groups tend to decline in nutritional value with longer residence in the United States and over generations.     

Letting people off the hook: when do good deeds excuse transgressions?

Three studies examined when and why an actor's prior good deeds make observers more willing to excuse--or license--his or her subsequent, morally dubious behavior. In a pilot study, actors' good deeds made participants more forgiving of the actors' subsequent transgressions. In Study 1, participants only licensed blatant transgressions that were in a different domain than actors' good deeds; blatant transgressions in the same domain appeared hypocritical and suppressed licensing (e.g., fighting adolescent drug use excused sexual harassment, but fighting sexual harassment did not). Study 2 replicated these effects and showed that good deeds made observers license ambiguous transgressions (e.g., behavior that might or might not represent sexual harassment) regardless of whether the good deeds and the transgression were in the same or in a different domain--but only same-domain good deeds did so by changing participants' construal of the transgressions. Discussion integrates two models of why licensing occurs.     

Social class, contextualism, and empathic accuracy

Recent research suggests that lower-class individuals favor explanations of personal and political outcomes that are oriented to features of the external environment. We extended this work by testing the hypothesis that, as a result, individuals of a lower social class are more empathically accurate in judging the emotions of other people. In three studies, lower-class individuals (compared with upper-class individuals) received higher scores on a test of empathic accuracy (Study 1), judged the emotions of an interaction partner more accurately (Study 2), and made more accurate inferences about emotion from static images of muscle movements in the eyes (Study 3). Moreover, the association between social class and empathic accuracy was explained by the tendency for lower-class individuals to explain social events in terms of features of the external environment. The implications of class-based patterns in empathic accuracy for well-being and relationship outcomes are discussed.     

From reorienting of attention to biased competition: Evidence from hemifield effects

When a distractor was presented simultaneously with or directly following a target, it produced more interference when it was presented in the same visual hemifield as the target than when it was presented in the opposite visual field. This result is interpreted in terms of biased competition; there is more competition between stimuli when they are presented in the same visual field, rather than in opposite visual fields. However, when the distractor was presented 125 msec or more prior to the target, this pattern was reversed. In those cases, there was more distractor interference when target and distractor were presented in opposite visual fields. This can be explained by assuming that attention was captured by the distractor, and that there was an additional cost of reorienting to a location in the opposite visual field.     

On Different Sides: Investigating the Persuasive Effects of Anger Expression in Political News Messages

Anger expression is increasingly prevalent in political news messages. However, the persuasive effects of expressing anger in a political context have received scant attention from researchers. We conducted two experiments to investigate the hypothesis that anger expression is detrimental to persuasion because it runs counter to well‐established social norms for the polite expression of opinions. We created political news messages including a persuasive appeal by a politician that was supported either with an expression of anger or with an expression of nonemotional disagreement. The results of Experiment 1 (N = 120) showed that anger messages were perceived as less appropriate than control messages, and that politicians expressing anger were perceived as less likable and less competent than politicians who disagreed in nonemotional terms. In Experiment 2 (N = 1,005), the negative effects of anger expression on perceived likability and competence were replicated. Also in line with Experiment 1, anger messages were perceived as less appropriate, but this time only for those with negative a priori attitudes toward the advocated position. In contrast, those with positive a priori positions toward the advocated position perceived anger messages as more appropriate than the control messages.     

‘Ought’ implies ‘can’ against epistemic deontologism: beyond doxastic involuntarism

Synthese - According to epistemic deontologism, attributions of epistemic justification are deontic claims about what we ought to believe. One of the most prominent objections to this conception,...     

Sex differences in the development of physical aggression: An intergenerational perspective and implications for preventive interventions

This article reviews the state of knowledge on the development of chronic physical aggression (CPA), with the aim of identifying the most effective prevention strategies. We specifically focus on the early development of physical aggression, on sex differences in the use of physical aggression, and on the transmission of behavior problems from one generation to the other. The body of research on the development of CPA from the past three decades that we review shows increasing evidence that its prevention requires a long-term biopsychosocial developmental approach which also must include an intergenerational perspective. Recent genetic and epigenetic research has indicated that there are both important genetic and environmental effects on gene expression which start at conception. We conclude that one of the most effective strategies to break the intergenerational transmission of CPA involves giving long-term support to pregnant women with a history of behavior problems, their spouse, and their offspring.     

微创技术在脑血管病诊治中的应用与存在的问题

脑血管病是危害人类健康的三大疾病之一.随着CT、,MRI、DSA等先进设备的应用,脑血管病的诊治水平进入一个新的阶段.显微手术、血管内栓塞、γ-刀或X-刀等很多微创技术不断应用于脑血管病的治疗.由于各地区发展不平衡,微创技术的应用尚存在不少问题.因此,必须积极稳妥地开展脑血管病诊治中的微创技术.