The generalized matching law describes choice on concurrent variable-interval schedules of wheel-running reinforcement

Six male Wistar rats were expose to concurrent variable-interval schedules of wheel-running reinforcement. The reinforcer associated with each alternative was the opportunity to run for 15 s, and the duration of the changeover delay was 1 s. Results suggested that time allocation was more sensitive to relative reinforcement rate than was response allocation. For time allocation, the mean slopes and intercepts were 0.82 and 0.008, respectively. In contrast, for response allocation,mean slopes and intercepts were 0.60 and 0.03 respectively. Correction for low response rates and high rates of changing over, however increased slopes for response allocation to about equal those for time allocation. The results of the present study suggest that the two-operant form of the matching law can to extended to wheel-running reinforcement. The effects of a low overall response rate, as short changeover delay, and long postreinforcement pausing on the assessment of matching in the present study are discussed.