title: The Preschool Behavioral Classification Project: a follow-up report.
mesh_terms: D000342:Affective Symptoms / Q000175:diagnosis; D002653:Child Behavior Disorders / Q000175:diagnosis*; D002672:Child, Gifted; D002675:Child, Preschool; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis; D010290:Parents; D011581:Psychological Tests; D011594:Psychometrics; D012737:Sex Factors; D013064:Speech Disorders / Q000175:diagnosis