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Shull, Richard L.; Grimes, Julie A.; Bennett, J. Adam – Journal of the Experimental Analysis of Behavior, 2004
By nose poking a lighted key, rats obtained food pellets on either a variable- interval schedule of reinforcement or a schedule that required an average of four additional responses after the end of the variable-interval component (a tandem variable-interval variable-ratio 4 schedule). With both schedule types, the mean variable interval was…
Descriptors: Reinforcement, Intervals, Time Management, Animals