This study tested two alternative hypotheses regarding the relations betwee
n child behavior and peer preference. The first hypothesis is generated fro
m the person-group similarity model, which predicts that the acceptability
of social behaviors will vary as a function of peer group norms. The second
hypothesis is generated by the social skill model, which predicts that beh
avioral skill deficiencies reduce and behavioral competencies enhance peer
preference. A total of 2895 children in 134 regular first-grade classrooms
participated in the study. Hierarchical linear modeling was used to compare
four different behaviors as predictors of peer preference in the context o
f classrooms with varying levels of these behavior problems. The results of
the study supported both predictive models, with the acceptability of aggr
ession and withdrawal varying across classrooms (following a person-group s
imilarity model) and the effects of inattentive/hyperactive behavior (in a
negative direction) and prosocial behavior (in a positive direction) follow
ing a social skill model and remaining constant in their associations with
peer preference across classrooms. Gender differences also emerged, with ag
gression following the person-group similarity model for boys more strongly
than for girls. The effects of both child behaviors and the peer group con
text on peer preference and on the trajectory of social development are dis
cussed.