title: Early development of stereotyped and self-injurious behaviors: II. Age trends.
abstract: Thirty-nine infants who were served in early intervention programs and who engaged in stereotyped or self-injurious behaviors were studied weekly from the time they entered the school until they were 3 years old. The development of these behaviors increased and declined over age more slowly than in typical babies. A few children retained the behaviors for long periods, and some were still showing them when they left the program. The hypothesis that body-rocking promotes motor development was not supported. Indeed, body-rocking may be a consequence of motor development. Head-banging seemed to be related to tantrums, whereas eye-poking developed early and seemed to be self-stimulatory. Suggestions for early treatment are presented.
mesh_terms: D002675:Child, Preschool; D002658:Developmental Disabilities / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D007223:Infant; D018730:Infant Behavior; D011187:Posture; D016728:Self-Injurious Behavior / Q000150:complications* / Q000175:diagnosis; D012720:Severity of Illness Index; D013239:Stereotyped Behavior; D014743:Videotape Recording