Figure 2.

(a) Players used social information to guide their choices. Consequently, accuracy increased when valid social information was presented and decreased under invalid social information. Accuracy further increased when a norm prescribed a decision in line with social information (SAME). Contrarily, under a norm prompting decisions against social information the effect was attenuated (ONLY). (b) Conformity was modulated by social norms. Added social norms resulted in an increase (SAME) or decrease (ONLY) of choices in line with the social information (i.e. conformity) compared to a condition without social norm (NONE). This change was stronger in the harm others experiment when players were prompted to decide against the other players. Post hoc comparisons were conducted for each condition and experiment separately for deviation from zero and whether experiments differed within conditions. *p < 0.05; ***p < 0.001. In both panels, error bars denote standard error of the mean. For statistics in (a) and (b), see main text.