A matter of perspective: Distinct brain mechanisms for evaluating positive and negative social feedback about oneself and another person.

Social rejection is a common experience in the life of young adults. Electroencephalographic (EEG) such as N1, P1 and P3 amplitude has been linked to experiencing social rejection; it remains unclear, whether these components are also influenced by the perspective, e.g., feedback directed to oneself or another person. We used EEG to investigate brain mechanisms associated with social feedback, directed either to oneself or another person. Female students (N = 57) engaged in a Chatroom Interact Task (CIT) during EEG. In this task participants received feedback as to whether themselves or someone else was accepted or rejected as a video chat partner. Mood was measured with the Positive Affect Negative Affect Schedule (PANAS). Participants showed more negative mood after rejection compared to acceptance. Spatiotemporal EEG cluster analysis revealed significant differences in P1, N1 and P3 ERP components associated with Acceptance vs. Rejection. The late positive potential (LPP) component was larger when processing self vs. other-related social feedback. Higher empathy, neuroticism, and lower age were associated with smaller LPP amplitude differences between Self and Other conditions. In this study we identified distinct brain dynamics associated with encoding social feedback and whether the feedback was targeted toward the self or to others.