First grade children from two Head Start (HS) groups and one non-Head Start (NHS) group were administered a battery of tests for the purposes of (1) comparing the developmental status of HS and NHS subjects, (2) examing patterns of specific learning disabilities among HS and NHS children, (3) determining the stability coefficients of selected…

A general working model of cognitive development assumes that there are sets of orthogonal cognitive abilities, which remain fairly stable after age 7. This paper examines the long term predictive and diagnostic value of assessing specific cognitive abilities among preschool children. This model by empirical studies was defendable on the grounds…

A comprehensive evaluation of the present state of infant and preschool mental testing in the United States is the concern of this monograph by the Society for Research in Child Development. Literature, technical and professional, covering the concept of intelligence and its measurement, was reviewed, organized, and summarized (chapters II and…