Proposes that a school tracking system can be a good context for studying the effects of stratification on socialization. Tracking is found to have a pronounced influence on the dispersion of I.Q. scores. Concludes with speculations on the relationship of stratification and socialization process. (Author/AM)

A motor performance typology of boys and girls (ages 6-10 years) was developed, based on four factors extracted by factor analysis from data on 47 physical growth and motor performance variables. Nineteen variables which best described the four factor-defined components were used in formulating the person-clusters (typologies) following Tryon's…

A 12-item stimulus list composed of three conceptual categories, each with two low- and two high- associated word pairs, was presented for free Ss recall to 20 educable mentally retarded (EMR) preadolescents, 20 EMR adolescents, and 20 nonretarded fourth-grade children who showed associative clustering in accordance with preexperimental interitem…

A grouping task revealed a chronological progression: color and form determined the 4-year-old children's grouping about equally; form dominated in the 5-year-olds; and 9-year-olds grouped primarily by conceptual attributes. Performance on a memory task showed the developmental shift from color to form to concept, while cued recall showed…

A cluster analytic study was conducted to derive behaviorally homogeneous subtypes of pervasive developmental disorders (PDD) based on a range of behavioral symptoms that characterize autism. Analysis of data on 34 children with PDD, 27 of whom met criteria for autism, indicated 4 distinct groups differing on independent measures of social,…

This paper examines several recent lines of research concerning category clustering and describes an alternative to the standard category clustering procedure used to study recall organization in younger children. The specific issue considered is the age at which children first show evidence of spontaneous category clustering in their free-recall.…