A confluence model is developed that explains the effects of birth order and family size on intelligence. (Editor)

In research conducted "over a period of 20 years" on aptitudes of high level personnel, the purpose was to analyze thinking abilities or processes into their unique components. The approach was through study of individual differences in performance on intellectual tasks varied systematically over broad ranges of psychological functioning.…

Four models are discussed with which to view students, educational goals, and learning environments. Each of the four theories emphasizes a unique aspect of the total development process. Piaget's model describes the development of structures and processes which characterize mature logical thinking. Perry provides a closer look at students'…

Four models are developed to provide a conceptual basis for a curvilinear relation between intelligence and an individual's influence over group members. The models deal with influence and percentile placement in intelligence, comprehension by potential followers, vulnerability to rival intellects, and correlation between mean group IQ and the…