| Popis: |
Human subjects performed a button-pressing task for three sessions on one of six different multiple variable interval, variable interval (mult VI VI) schedules, followed by one session of extinction on both schedule components. Separate groups were trained with schedule components of VI-5s vs VI-10s, VI-5s vs VI-20s, VI-5s vs VI-40s, VI-10 vs VI-20s, VI-10s vs VI-40s, and VI-20s vs VI-40s. During acquisition, the degree of component discrimination as well as how closely the data fitted Herrnstein′s Matching Law were controlled by both the absolute and relative differences between schedule components and the overall density of reinforcements. During extinction, most subjects responded more to the high-density component than to the low-density component, but responding also declined more rapidly in the higher density component. Differences during extinction were influenced by the absolute and relative differences in the schedule components experienced during acquisition as well as by which component was experienced first during extinction. |
