title: Problem behavior and psychiatric impairment within a developmentally disabled population. II: Behavior severity.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001519:Behavior; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000523:psychology*; D007360:Intelligence; D001523:Mental Disorders / Q000523:psychology; D008875:Middle Aged; D012112:Residential Facilities