Noncompliance and dropouts as a problem of longitudinal studies in child psychology.
D000293:Adolescent; D002648:Child; D003299:Cooperative Behavior; D003657:Decision Making; D005260:Female; D005860:Germany, West; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology; D012107:Research Design / Q000592:standards*