Current studies of cognition emphasize the contrast between two approaches to analysis of individual differences. It is concluded that the cognitive components approach incorporates the cognitive correlates approach, avoids the inadequacy of correlational methods, and models individual differences on various dimensions of cognitive functioning.…

The scientific concept of intelligence has been heavily influenced by the technology of measurement. The variables which can be measured have been made the operational definition of intelligence. This approach differs from a deductive approach, in which a theory of cognition in general is used to derive the sorts of measurements that must be taken…

This overview of recent research on individual differences especially concerns that research which relates to human learning and instruction. Several major areas of research are identified, and within each area various issues related to that area and representative studies are discussed. Whenever possible, references to more comprehensive reviews…