This paper summarizes empirical findings of research on a theory of general mental ability, based on laboratory studies of the relationship between measurements of individual differences on conventional psychometric tests and in speed and efficiency of information processes. The paper covers characteristics of "g" (general mental ability),…

Reflections on psychological perspectives of aging are focused around issues of biological changes and mental functioning, genetic factors in aging, psychological changes with aging, individual differences in mental functioning and the intellectual decline of the aged. (EH)

The authors propose a matrix for a comprehensive approach to cognition and aging. The dimensions of the matrix are (1) biological, psychological, and social factors; and (2) the information processing variables of input, processing, and output. (Journal availability: Department of Adult Education, Kansas State University, Manhattan, KS 66506.) (SK)

This review aims to create a cross-disciplinary framework for understanding the perception of control. Although, the personality trait locus of control, the most common measure of control perception, has traditionally been regarded as a product of social learning, it may have biological antecedents as well. It is suggested that control perception…

This volume provides an informed and accessible overview of the whole area of children's thinking. The book reviews children's thinking in detail by discussing the ways children remember and organize information in general; the acquisition of skills such as reading, writing, and arithmetic; and the development of more complex reasoning as children…

Sex differences in cerebral organization and functioning, and the apparent superiority of males in spatial ability are examined in this paper. Attention is given to several kinds of cognitive and perceptual tasks in which sex differences in spatial ability have been shown to exist; among these are tasks involving: (1) recall and detection of…

The course of study of time-of-day effects on human performance has not been an easy one to chart, with many findings that seem to be in opposition. This review examines the difference between group and individual differences with regard to time-of-day effects; time-of-day effects in individuals; morningness-eveningness as an individual…