Behavioral momentum. Implications and development from reinforcement theories.

Historical and contemporary theories of reinforcement, as well as the clinical application of reinforcement principles to behavior modification and therapy, are critically analyzed and discussed. A new behavioral approach to studying the allocation of behavior under changed environmental constraints, termed behavioral momentum, is also presented. Whereas traditional behavioral analysis has emphasized the role of response rate as an index of response probability and response strength, more recent studies have addressed the persistence of behavior under altered environmental conditions and reinforcement contingencies. In terms of behavior modification and therapy, issues such as generalizability and relapse prevention have major implications for the type and length of behavioral intervention strategies employed. The behavioral momentum model analyzes operant behavior not only in terms of its response rate but also in relation to its persistence under changed environmental constraints. The authors discuss the applicability of this recent addition to reinforcement theories in context of its implications for behavior modification and therapy.