Conceptual notions and empirical evidence suggest that the intraindividual correlation (iCorr) of positive affect (PA) and negative affect (NA) is a meaningful characteristic of affective functioning. PA and NA are typically negatively correlated within-person. Previous research has found that the iCorr of PA and NA is relatively stable over time…

Examines the theoretical basis of suggestions that children's brain size and intelligence grow in periodic spurts and plateaus and that schooling should be planned accordingly. A "mock debate" presents excerpts from researchers holding conflicting viewpoints on this issue. (TE)

Four studies with kindergarten through fifth graders and adults examined the development of reasoning about the origins of psychological traits. Results suggested an age-related increase in the tendency to distinguish among different psychological traits, and that over time, individuals come to believe that psychological traits are determined…

Discussed are the principles of Gestalt psychology and the history and future of the movement. A comparison of Gestalt, Behaviorist, and Structuralist ideas is included. The study of perception, learning, memory, and thinking from the Gestaltist point of view is described. (KR)