Research supported in part by grants from the Ford Foundation and the National Institutes of Health (MH-08542).

A method for empirical classification of autistic and autisticlike children, based on behavior observations of 35 males and 11 females (ages 4-28 years) was examined. Factor and cluster analysis indicated four subtypes, characterized by perseverative thinking and play, motor disturbances, schizotypal/schizoid features, and anxiety and negativism.…

The present study was designed to (1) investigate the changes in the structure and organization of mental abilities during childhood and adolescence of 514 students as sampled by the Wechsler Intelligence Scale for Children (5 to 15 years) and the Wechsler Adult Intelligence Scale (16 to 18 Years) and (2) interpret, and possibly modify, the…

The assessment of school readiness needs to include all aspects of children's early learning and indicators of family/community activities that support children's development. This study used a holistic approach to set baseline benchmarks on factors related to school readiness for entering kindergarten children, and to engage schools in Washington…