Behavioral characteristics of high- and low-IQ autistic children

Abstract
The Behavior Observation Scale was developed to objectively differentiate autistic, normal and mentally retarded children aged 30-60 mo. Operational definitions and procedures are described and data on the frequency of selected behaviors among 114 children are reported. To assess the clinical significance of behaviors in autistic children, frequency of occurrence per subject and the number of children exhibiting the behaviors must be considered concurrently. The hypothesis that it is critical to consider the IQ of the child when assessing the clinical significance of individual behaviors and groups of behaviors is confirmed.