Training context can influence resistance to disruption under differing reinforcement schedules. With nonhumans, when relatively lean and rich reinforcement schedules are experienced in the context of a multiple schedule, greater resistance is found in the rich than the lean component, as described by behavioral momentum theory. By contrast, when…

This study of 68 girls in a sports-with-prizes treatment indicated that children can be induced to behave generously, even after a lapse of time, in proportion to the amount of modeled generous behavior they see. Older children and children experiencing success were more generous. (SJL)