Problem-behavior rating scale data on elementary-aged learning disabled and normal boys were factor analyzed. Somewhat different factors were identified for normal and learning disabled groups. Implications of the findings for hyperactivity as distinct from other conduct problems and for classifying youngsters' behavior and emotional problems are…

This study organizes items from seven behavior rating instruments into as few behavior clusters as possible. Methods used include card sort activities and a panel of experts examining items to establish their subgroup placement. Findings indicate a method for organizing behavior descriptors into clearly defined subgroupings and unifying behavior…

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.…

Analysis of data from the Behaviour Disorder Scale for 405 adults and adolescents with intellectual disability revealed that subjects exhibited a mean of 14 problem behaviors per person. Factor analysis identified two general syndromes (a conduct syndrome and an emotional syndrome), raising the possibility of dealing with sets of problem behaviors…

The Autism Behavior Checklist was completed for 67 autistic and 56 mentally retarded and learning-disabled children (ages 6-15). The checklist was effective in classifying children when using either the full scale or only the more highly weighted items. Results did not support a single unidimensional scale or subdividing the checklist into five…

The factor structure of the Quay Peterson Behavior Problem Checklist was investigated with 358 children identified for or placed in special education classes for the emotionally disturbed, learning disabled, and educable mentally retarded. Ss were selected across racial backgrounds to determine the scale's efficacy in measuring personality…