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Personal values have a key role in determining people's perceptions, judgments, and behaviors. Only a handful of studies examined determinants of children's values outside the family. We used longitudinal data on children's values from 15,008 children in Grades 3 to 9, and homeroom teachers' reports about the behaviors of 3,476 of these children. As predicted, peers' values were positively correlated with the strengthening of children's corresponding values. Moreover, with the exception of self-transcendence values, peer values had an indirect effect on corresponding child behavior, through children's self-endorsed values. Girl peers had stronger effects on both girls' and boys' values. In addition, we found some evidence for stronger relationships between peer and children's values among the older children, in particular among boys. These latter effects were even more prominent in an extended sample that included data from first and second graders. We discuss the theoretical and practical implications of our findings.

Theories of visionary leadership propose that groups bestow leadership on exceptional group members. In contrast, social identity perspectives claim that leadership arises, in part, from a person's ability to be seen as representative of the group. Integrating these perspectives, the authors propose that effective leaders often share group members' perspectives concerning the present, yet offer a unique and compelling vision for the group's future. In addition, although intergroup contexts may increase the value of representativeness, the authors predict that vision dominates representativeness in single-group situations characterized by high levels of collective stress (e.g., a natural disaster). Five studies demonstrated that visionary leaders (those who offer novel solutions to their group's predicament) attract more followers, promote group identification and intrinsic motivation, mobilize collective action, and effectively regulate group members' emotions and reactions to crises compared to representative leaders. The authors discuss when, why, and how vision triumphs over representativeness in leader emergence and effectiveness., (© 2011 by the Society for Personality and Social Psychology, Inc)