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Schools can play an important role in adolescents' identity development. To date, research on the role of school in adolescents' identity development is scattered across research fields that employ different theoretical perspectives on identity. The aim of this literature review was to integrate the findings on the role of school in adolescents' identity development from different research fields and to provide schools and teachers with insights into how adolescents' identity development can be supported. Using constant comparative analysis, 111 studies were analyzed. We included articles on personal and social identity and on school-related identity dimensions. Three groups of studies emerged. First, studies on how schools and teachers unintentionally impact adolescents' identity showed that, at school, messages may unintentionally be communicated to adolescents concerning who they should or can be through differentiation and selection, teaching strategies, teacher expectations, and peer norms. Second, studies on how schools and teachers can intentionally support adolescents' identity development showed that different types of explorative learning experiences can be organized to support adolescents' identity development: experiences aimed at exploring new identity positions (in-breadth exploration), further specifying already existing self-understandings (indepth exploration), and reflecting on self-understandings (reflective exploration). The third group suggests that explorative learning experiences must be meaningful and situated in a supportive classroom climate in order to foster adolescents' identity development. Together, the existing studies suggest that schools and teachers are often unaware of the many different ways in which they may significantly impact adolescents' identity development.

Two studies investigated whether parent-child discussion of peer provocations reduces young children's hostile attributional bias. Study 1 (N = 109, age 4-7)—an observational study—showed that parent-child discussion of nonhostile attributions (when reading a picture book) predicted reductions in children's hostile attributional bias from pre- to postdiscussion. Study 2 (N = 160, age 4-6)—an experimental study—showed that stimulating parents to discuss either nonhostile attributions or normative beliefs (vs. a control condition) reduced children's hostile attributional bias in response to hypothetical vignettes, but not in response to a staged peer provocation. These findings suggest that by framing social situations, parents may help their children perceive less hostility in their social worlds.

This experiment tested whether peer approval and disapproval experiences can cause immediate change in children's state self-esteem. Children's narcissistic traits and evaluator perceived popularity were examined as potential moderators. A total of 333 preadolescents (M = 10.8 years) completed personal profiles on the Internet that were ostensibly judged by a jury consisting of popular and unpopular peers. Participants randomly received negative, neutral, or positive feedback from the jury. Next, they could examine the feedback that each individual judge gave them. As expected, peer disapproval decreased self-esteem, especially in children high in narcissism. In contrast, peer approval increased self-esteem. Moreover, disapproved children's self-esteem recovery was dependent on the extent to which they subsequently viewed positive feedback from popular judges. These findings support sociometer theory.

Two experiments tested an intervention approach to reduce young children’s hostile attribution bias and aggression: self-persuasion. Children with high levels of hostile attribution bias recorded a video-message advocating to peers why story characters who caused a negative outcome may have had nonhostile intentions (self-persuasion condition), or they simply described the stories (control condition). Before and after the manipulation, hostile attribution bias was assessed using vignettes of ambiguous provocations. Study 1 (n = 83, age 4–8) showed that self-persuasion reduced children’s hostile attribution bias. Study 2 (n = 121, age 6–9) replicated this finding, and further showed that self-persuasion was equally effective at reducing hostile attribution bias as was persuasion by others (i.e., listening to an experimenter advocating for nonhostile intentions). Effects on aggressive behavior, however, were small and only significant for one out of four effects tested. This research provides the first evidence that self-persuasion may be an effective approach to reduce hostile attribution bias in young children.

This study investigated mechanisms behind proactive and reactive aggression, by examining whether four types of self-serving cognitive distortions and the personality traits agreeableness and conscientiousness differently predicted proactive and reactive aggression. Self-report questionnaires and a peer nominations method were administered to 173 sixth grade children (age 10–13) of regular elementary schools in the Netherlands. Negative binomial regression analyses showed that proactive aggression was predicted by self-centered and disagreeable tendencies, whereas reactive aggression was predicted by the misattribution of blame to others and the self-regulatory aspects of agreeableness and conscientiousness. Findings emphasize the need to differentiate proactive and reactive aggression in order to accurately predict, prevent and treat aggressive behaviors in childhood.