The ERP literature on the FRN seldom includes examination of sex differences. We observed a significant main effect of sex on ERP amplitude, indicating that males produced a larger FRN irrespective of feedback type. This finding resembled our previous work with 15-year-old high-risk adolescents, using a paradigm that involved loss rather than non-reward. A sex difference also emerged for latency to peak, with males showing a longer latency for reward feedback only.
