Children's Peer Relationships: Longitudinal Prediction of Internalizing and Externaliziing Problems from Middle to Late Childhood

Abstract In this longitudinal study, the predictive relations between social difficulties in early childhood (grade 2) and subsequent internalizing as well as externalizing problems in middle childhood (grade 5) were examined. Of particular interest was whether early indices of social isolation would predict internalizing problems 3 years later. A longitudinal sample of 87 children were assessed in both grades 2 and 5 on a variety of measures, including sociometric ratings, peer assessments of aggression and isolation, and self-appraisals of social competence. In the second grade, observations of isolated and aggressive behavior were made, as well, and teacher ratings of internalizing and externalizing difficulties were obtained. In the fifth grade, teacher ratings of shy-anxious and acting-out behavior and self-reports of loneliness and self-esteem were collected. Consistent with previous research, results demonstrated predictive links between early peer rejection (unpopularity) and aggression and subsequent externalizing difficulties. Internalizing problems in middle childhood were significantly related to early social difficulties, particularly those of an internalizing sort, including poor peer acceptance, social isolation, and perceptions of social incompetence. Social isolation, then, may indeed be a risk factor in early development.