This paper summarizes data comparing the correlation patterns of psychometric, social, and demographic variables with intelligence quotient (IQ) and learning potential (LP) scores derived from the Kohs Block Designs and Raven Progressive Matrices procedures. The sample consists of educable mentally retarded special class and institutionalized…

The study sought to use Jensen's two-level theory of mental abilities to predict some hitherto unknown or unnoticed phenomena--facts about which the theory should yield clear-cut predictions and which are not as clearly predictable from other theories, though they may receive ad hoc explanations after the fact. From the two-level theory of mental…

THE REPORT DESCRIBES 13 EXPERIMENTAL STUDIES OF LEARNING IN CHILDREN BETWEEN FOUR AND 12 YEARS OF AGE. THE EXPERIMENTS CONCERN--(1) THE ISOLATION CONDITIONS UNDER WHICH ELABORATIVE FACILITATION OF LEARNING OCCURS, AND (2) THE RELATIONSHIP BETWEEN ELABORATION AND INDIVIDUAL DIFFERENCES IN LEARNING PROFICIENCY. BECAUSE CHILDREN LEARN NOUN PAIRS AND…

After intensively studying for several years the thinking processes of members of a tribal group in Western Africa, the Kpelle, the authors examine the relation between culture and cognitive development. The following issues are discussed: (1) an analysis of the terms "culture" and "cognition"; (2) an ethnographic description of the Kpelle…