This study examined the levels and growth of specific and general normative beliefs about nonviolence (called norms for nonviolence). The sample consisted of 1254 middle school students from four metropolitan areas who participated in the control condition of the Multisite Violence Prevention Project. We predicted that the association and…

Longitudinal study showed that during 6th and 7th grades boys reported significantly higher levels of self-competence than girls. Boys were less depressed and anxious than girls in 7th grade, but not in 6th grade. Results support the hypothesis that self-competence is partially responsible for the emergence of gender differences in depression and…

Social identity theory (SIT) was used to investigate effects of social categorization on adolescents' intergroup behaviour. Participants displayed consistent ingroup-favouring behaviour in their ratings: the ingroup was associated to a greater extent than the outgroup with positively valued dimensions, and to a lesser extent with negatively valued…