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  • Title: Stimulus change as a factor in response maintenance with free food available.
    Author: Osborne SR, Shelby M.
    Journal: J Exp Anal Behav; 1975 Jul; 24(1):17-21. PubMed ID: 1202121.
    Abstract:
    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.
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