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On 12 January, Jorien van Hoorn successfully defended her thesis titled "Hanging out with the right crowd: Behavioral and neuroimaging studies of peer influence on decision-making in adolescence," which was supervised by Prof. Evelien Crone, Prof. Erik van Dijk, and Prof. Carolien Rieffe.Adolescents influence each other in decision making. This may not just lead to risk-taking behaviors but also more pro-social behaviors. It is important to acknowledge both the negative and positive effects of peer pressure, says Jorien. Furthermore, adolescents with autism are also influenced by the opinions of peers. In a division game, Jorien found that adolescents with autism were influenced by their peers to the same extent as those without autism. You can read more about her research here (in Dutch) or here (in English).