Childhood echolalia. A group study of late abatement.
D002648:Child; D002675:Child, Preschool; D004454:Echolalia / Q000175:diagnosis; D005260:Female; D006801:Humans; D007804:Language Development; D008297:Male; D013064:Speech Disorders / Q000175:diagnosis*; D013637:Tape Recording; D014705:Verbal Behavior