Ingroup favoritism influences third-party norm enforcement: Third-party punishers are more lenient when an ingroup member has been unfair. By contrast, in 2-party contexts, where punishers are the victims of unfairness, group bias effects are absent or inconsistent. Thus, group bias appears to be particularly influential when enforcing fairness…

The present study investigated age-related changes in the intergroup allocation of resources depending on whether the ingroup norm was competitive or cooperative. Participants included children (M[subscript age] = 8.69), adolescents (M[subscript age] = 13.81), and adults (M[subscript age] = 20.89), (N = 263) who were inducted into simulated groups…

Two studies examined in-group favoritism and out-group prejudice among two samples of white 4- to 7-year-olds. Findings indicated that the two attitudes were reciprocally correlated in the sample from a racially homogeneous school but not in the sample from a mixed-race school. In-group favoritism did not appear until 5 years of age and was…