title: Feedback functions for variable-interval reinforcement.
abstract: On a given variable-interval schedule, the average obtained rate of reinforcement depends on the average rate of responding. An expression for this feedback effect is derived from the assumptions that free-operant responding occurs in bursts with a constant tempo, alternating with periods of engagement in other activities; that the durations of bursts and other activities are exponentially distributed; and that the rates of initiating and terminating bursts are inversely related. The expression provides a satisfactory account of the data of three experiments.
authors.forename: J A
authors.initials: JA
authors.lastname: Nevin
authors.forename: W M
authors.initials: WM
authors.lastname: Baum