Self-report on believability of the emotional-state and virtual peer manipulations did not differ by age group. (a) All age groups reported significant believability (adolescents t = 17.5, df = 65, p < 0.0001; young-adults t = 20.48, df = 48, p < 0.0001; adults t = 16.39, df = 52, p < 0.0001). There was no effect of age group or peer condition on believability of the color background with the expected outcome of winning money or hearing noise (p = 0.3387 and p = 0.6371, respectively). (b) There was no age difference in the self-reported peer influence of the peer manipulation (p = 0.2613)