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Direct linkRickard, J. F.; Body, S.; Zhang, Z.; Bradshaw, C. M.; Szabadi, E. – Journal of the Experimental Analysis of Behavior, 2009
This experiment examined the relationship between reinforcer magnitude and quantitative measures of performance on progressive-ratio schedules. Fifteen rats were trained under a progressive-ratio schedule in seven phases of the experiment in which the volume of a 0.6-M sucrose solution reinforcer was varied within the range 6-300 microliters.…
Descriptors: Reaction Time, Correlation, Reinforcement, Response Rates (Questionnaires)
Grace, Randolph C.; McLean, Anthony P. – Journal of the Experimental Analysis of Behavior, 2006
Pigeons' choice in concurrent chains can adapt to rapidly changing contingencies. Grace, Bragason, and McLean (2003) found that relative initial-link response rate was sensitive to the immediacy ratio in the current session when one of the terminal-link fixed-interval schedules was changed daily according to a pseudorandom binary sequence (e.g.,…
Descriptors: Animals, Selection, Change, Adjustment (to Environment)
