Abstract
The effects of including nonfunctional stimuli that may appear in the natural environment during treatment remain unclear. The current study evaluated preference for differential reinforcement of communication (DRC) treatments with functional reinforcers only and a combination of functional and nonfunctional stimuli. Both treatment conditions resulted in a decrease in destructive behavior and an increase in the communication response for all participants. Two participants preferred the combined DRC condition, whereas one participant showed equal preference for the combined condition and one of the functional conditions.