Use of Self-Delivered Reinforcement and Group Contingency Management to Increase Productivity of Severely Retarded Workers

An experiment was conducted to determine whether a group contingency could enhance the effectiveness of self-delivered reinforcement in boosting the productivity of 10 severely retarded clients in a work activity center. An ABAC reversal design showed that self-delivered reinforcement significantly increased productivity above baseline levels. Moreover, the addition of a group contingency seemed to render self-delivered reinforcement more effective.