This paper summarizes the case histories of four young children with concurrent autistic disorder and Williams syndrome. Williams syndrome comprises a peculiar facial appearance, learning disorder, and often hypercalcemia, mild microcephaly, large blood vessel stenosis, and a specific behavioral phenotype. Literature on Williams syndrome is…

This report presents three case reports of male children who meet criteria for autism and also Aarskog syndrome, a genetic disorder characterized by hypertelorism, short nose, long philtrum, short stature, brachydactyly, and shawl scrotum. Two of the children also presented with severe mental retardation. (DB)

This article describes the development and validation of the Developmental Behavior Checklist for children with emotional and behavior problems along with mental retardation. The article discusses generating and refining the checklist items, results of a principal components analysis, establishing reliability and construct and criterion validity,…