This study examined behavioral adjustment in 22 siblings of children with autism. Mothers rated these children as having more behavior problems and fewer prosocial behaviors than a normative sample. Analysis of variables revealed that male siblings and children younger than the autistic sibling engaged in fewer prosocial behaviors. Psychological…

The possibility of differential sex proportions as a confounding factor in the Lovaas (1987) study is raised. It is argued that the chi-square analysis was inadequate and that the appropriate comparison should be made between the experimental and the control group using population data to estimate expected cell frequencies. (Author/CR)

Teacher ratings on the Aberrant Behavior Checklist were collected on 666 students with mental retardation attending special classes. Classroom placement and age had significant effects on subscale scores, whereas sex failed to affect ratings. The study concludes that the original scoring method, developed for individuals in residential facilities,…