Jacob T C, Fantino E
Department of Psychiatry, University of California-San Diego, La Jolla 92093.
J Exp Anal Behav. 1988 May;49(3):367-81. doi: 10.1901/jeab.1988.49-367.
Two experiments investigated the effects of successive reinforcement contexts on choice. In the first, concurrent variable-interval schedules of primary reinforcement operated during the initial links of concurrent chains. The rate of this reinforcement arranged by the concurrent schedules was decreased across conditions: When it was higher than the terminal-link rate, preference for the higher frequency initial-link schedule increased relative to baseline. (During baseline, a standard concurrent-schedule procedure was in effect). When the initial-link reinforcement rate was lower than the terminal-link rate, preference converged toward indifference. In the second experiment, a chain schedule was available on a third key while a concurrent schedule was in effect on the side keys. When the terminal link of the chain schedule was produced, the side keys became inoperative. Availability of the chain schedule did not affect choice between the concurrent schedules. These results show that only when successive reinforcement contexts are produced by choice responding do those successive contexts affect choice in concurrent schedules.
两项实验研究了连续强化情境对选择的影响。在第一个实验中，在并发链的初始环节采用并发可变间隔初级强化程序。在不同条件下，并发程序安排的这种强化速率降低：当它高于终端环节速率时，相对于基线，对较高频率初始环节程序的偏好增加。（在基线期间，标准的并发程序程序有效）。当初始环节强化速率低于终端环节速率时，偏好趋向于无差异。在第二个实验中，当侧键上的并发程序有效时，第三个键上有一个链程序可用。当链程序的终端环节产生时，侧键失效。链程序的可用性不影响并发程序之间的选择。这些结果表明，只有当连续强化情境由选择反应产生时，这些连续情境才会影响并发程序中的选择。
