Basic research with pigeons on behavioral momentum suggests that differential reinforcement of alternative behavior (DRA) can increase the resistance of target behavior to change. This finding suggests that clinical applications of DRA may inadvertently increase the persistence of target behavior even as it decreases its frequency. We conducted…

Three experiments involving four children (ages 3-7) with mental retardation found participants preferred unreliable reinforcements under certain conditions. Findings are discussed regarding the role of specific stimuli as conditioned reinforcers and how they influence preference for a response that produces reinforcement on a leaner schedule than…