background: to compare the effectiveness of basnef and classic educational models to improve the assertion skill level of high school boy students. methods: the 60 high school male students from shiraz city, fars province iran, were participated in this study. they were randomly divided in two groups (groups a and b). the group a attended in designed educational planning based on basnef model a...

A hallmark of human social cognition is the tendency for both adults and children to favour members of their own groups. Critically, this in-group bias exerts a strong influence on cooperative decision-making: people (i) tend to share more with members of their in-group and (ii) differentially enforce fairness norms depending on the group membership of their interaction partners. But why do peo...

Perceived descriptive norms are one of the strongest predictors of college drinking. Social Identity Theory posits that much of our identity is based on groups with which we affiliate. Prior research suggests that there is an association between perceived descriptive norms and drinking among those who identify more strongly with the normative referent group. However, no studies to date have exa...

This study explores the role of intragroup dynamics in intergroup conflict. In a computer-mediated negotiation experiment (N = 107), we investigated how a group representative’s standing in the group, group norm, and the representative’s need to belong influence behavior in intergroup negotiations. We hypothesized that the extent to which peripheral representatives adhere to group norms is cont...

Abstract Cooperative management of shared natural resources is one the most urgent challenges world facing today. While there have been advances in understanding institutional design features that enable sustainable management, are few field studies provide theory-based insights into social psychological predictors willingness to cooperate around resources. Here, we address this issue context l...

Research indicates that in-group favoritism is prevalent among both adults and children. Although research has documented that individuals do not consistently display an in-group bias, the conditions under which out-group preference exists are not well understood. In this study, participants (N = 462) aged 9 to 16 years judged in-group deviant acts that were either in line with or counter to a ...