Comparison of clinical diagnoses and Rimland E2 scores in severely disturbed children.

The Rimland E2 questionnaire was applied to three groups of children for whom clinical diagnoses of Infantile Autism, Autism with Associated Symptoms, and Mental Retardation had been made, as well as to normal controls. The results confirm that the Rimland scale is accurate in differentiating autistic from nonautistic children. But the scale does not appear to permit clear differentiation of infantile autism from autism with associated symptoms, and the more typical autistic children (diagnosed as Kanner's EIA) did not all yield high scores. Several possible explanations for this fact are put forward.