在有免费食物的情况下，刺激变化作为反应维持的一个因素。
Stimulus change as a factor in response maintenance with free food available.
作者信息
Osborne S R, Shelby M
出版信息
J Exp Anal Behav. 1975 Jul;24(1):17-21. doi: 10.1901/jeab.1975.24-17.
Rats bar pressed for food on a reinforcement schedule in which every response was reinforced, even though a dish of pellets was present. Initially, auditory and visual stimuli accompanied response-produced food presentation. With stimulus feedback as an added consequence of bar pressing, responding was maintained in the presence of free food; without stimulus feedback, responding decreased to a low level. Auditory feedback maintained slightly more responding than did visual feedback, and both together maintained more responding than did either separately. Almost no responding occurred when the only consequence of bar pressing was stimulus feedback. The data indicated conditioned and sensory reinforcement effects of response-produced stimulus feedback.
大鼠在一种强化程序下按压杠杆获取食物，在这种程序中，即使有一盘食丸，每一次反应都会得到强化。最初，听觉和视觉刺激伴随着反应产生的食物呈现。将刺激反馈作为按压杠杆的额外结果，在有免费食物的情况下反应得以维持；没有刺激反馈时，反应减少到很低的水平。听觉反馈比视觉反馈维持的反应略多，两者共同维持的反应比单独任何一种都多。当按压杠杆的唯一结果只是刺激反馈时，几乎没有反应发生。数据表明了反应产生的刺激反馈的条件强化和感觉强化作用。
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