Aggressive and cooperative behaviors of 70 preschool children were measured during game conditions and subsequent free-play periods. Cooperative behavior increased and aggression decreased during cooperative games and free play; conversely, competitive games were followed by increases in aggressive behavior and decreases in cooperative behavior.…

Discusses behavioral momentum and the general behavioral relation between the persistence of behavior and the rate of reinforcement obtained in a given situation. Strategies for establishing the generality of behavioral relations are reviewed, followed by a brief summary of evidence for the generality of behavioral momentum. (Author/CR)

Reviews laboratory research on behavioral momentum conducted with pigeons and summarizes its findings and their generality to people, including those with mental retardation. Discusses the high-probability procedure used to establish compliance in clinical settings and based in part on an extension of the momentum metaphor. (CR)

This commentary discusses John Nevin's article on establishing compliance via behavioral momentum involving high-probability procedures, and questions whether applications of behavioral momentum can be derived from the theory, whether applications could have been developed if the theory not been formulated, and whether the theory will add…