Figure 2.

Developmental asymmetries in adjusting to cooperative and uncooperative social environments. Decisions per age cohort are shown per social environment in the (a) Trust Game (N = 244) and (b) Coordination Game (N = 202). Across age cohorts, there is a pronounced increase in cooperative choices (i.e., trusting players from a Trustworthy environment in the Trust Game, and accepting a disadvantage from players from an Unfriendly environment in the Coordination Game), whereas uncooperative choices (i.e., withholding trust from players from an Untrustworthy environment in the Trust Game, and accepting an advantage from players from a Friendly environment in the Coordination Game) were relatively stable across age. Dashed lines in a and b indicate the reinforcement rates (i.e., fraction of 0.73 and 0.23) for each social environment. Note that we grouped participants for illustration purposes only and age was treated as a continuous variable in all analyses. Error bars represent s.e.m.