Ratio responding as a function of concurrent avoidance schedules, yoked shocks, and ratio value |
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| Authors: | Wood K A Happ A J Adams C K |
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| Abstract: | Fixed-ratio food-reinforced responding in rats was studied alone and with concurrent shock avoidance or with concurrent response-independent shocks matched to those that occurred in the avoidance condition. Under each condition, fixed-ratio size was increased over successive daily sessions. Fixed-ratio response rate generally passed through a maximum as a function of fixed-ratio size. Decreased fixed-ratio responding at values beyond the maximum occurred when (1) the time to complete a fixed ratio approximated the response-shock interval of the avoidance schedule, (2) the shock rate increased, and/or (3) the ratio requirements were so high that ratio strain occurred. Avoidance rates decreased slightly as fixed-ratio size increased. |
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| Keywords: | decreased responding fixed ratio avoidance yoked shocks concurrent schedules lever press rats |
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