Interpersonal stress in adolescence has been associated with alterations in neural responses to peer feedback, and increased vulnerability to psychopathology. However, it is unclear whether the associations of interpersonal problems with neural responses are global across event‐related potentials (ERPs) or might result in alterations only in specific ERPs. We examined associations between multiple informants of peer stress (self‐reported, parent‐reported, and peer‐reported) and multiple ERPs (N1, P2, RewP, and LPP) to social feedback in a sample of 46 early adolescents (aged 12–13 years). Reports of peer stress were only moderately correlated with one another, indicating different informants capture different aspects of peer stress. Regressions using informant reports to predict ERPs revealed greater parent‐reported peer stress was associated with a smaller RewP, whereas self‐reported stress was associated with a smaller P2, to acceptance. In contrast, greater peer‐reported stress was associated with larger P2, RewP, and LPP to acceptance. Findings suggest that different sources of stress measurement are differentially associated with ERPs. Future research using social feedback‐related ERPs should consider multiple sources of information as well as multiple ERP components across the time‐course of feedback processing, to gain a clearer understanding of the effects of peer stress on neural responses to feedback.

Adolescence is a time of dramatic social re-orientation (Nelson et al., 2005). During this period, proximity to and reliance on parents wanes (Larson & Richards, 1991), and youths' interactions and relationships with peers become more frequent, intimate, and influential (Brechwald

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