The present study examined the immediate and delayed effects of unobtrusive exposure to personality trait terms (e.g., "reckless,""persistent") on subjects' subsequent judgments and recollection of information about another person. The implications of individual and situational variation in the accessibility of different categories for judgments…

Concepts and methods suggested by cognitive psychology and recent experimental studies of the perception of duration have been employed in this research of judgments of historical duration by children aged between 8 and 15 years. Results indicate a developmental sequence in forms of historical temporal awareness. (Author/RK)

Piaget, in describing the sequence of classificatory development, describes class inclusion as composed of two processes; hierarchical classification and post-whole comparisons. In the experiment reported here, elementary school children, trained in the concept of sets in first grade mathematics were given a task where they were required to assess…