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Longitudinal StudyYoung ChildrenIndividual DifferencesGender DifferencesPROSOCIAL BEHAVIORPreschool ChildrenDepressive SymptomsLongitudinal DataEarly ChildhoodSocial CompetenceAdolescenceChild DevelopmentEmerging AdulthoodPSYCHOLOGICAL ADJUSTMENTCultural DifferencesRelational AggressionCognitive DevelopmentChildhoodSocial SupportChildren and Adolescents