Transfer of fixed- and variable-interval schedule control

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Trained male albino rats to respond on either chain or response lever (R1) and then switched them to the alternate operandum (R2). In Exp. I, 4 Ss trained on an FI schedule of reinforcement on R1 acquired the FI scallop pattern of responding on R2 more rapidly than they had on R1. In Exp. II with 8 Ss, a pronounced FI scallop developed more rapidly on R2 in the presence of a stimulus previously correlated with an FI schedule than 1 previously correlated with a VI schedule of reinforcement for R1. Results are discussed in relation to respondent mediation, operant mediation, and nonmediational theories of FI responding.

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