Signaling functions of the second-order CS: Partial reinforcement during second-order conditioning of the pigeon’s keypeck |
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| Authors: | Michael E Rashotte Beverly S Marshall Jeffrey M O’Connell |
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| Institution: | 1. Department of Psychology, Florida State University, 32306, Tallahassee, Florida
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| Abstract: | The signaling function of the second-order CS (S2) was manipulated in second-order autoshaping by arranging a partial reinforcement schedule. S2 was paired with a well-conditioned first-order CS (SI) on a continuous reinforcement or a 25% reinforcement schedule in different groups. Schedule of reinforcement did not influence the number of S2-S1 pairings required to establish keypecking to S2. However, in the postacquisition sessions, responding to S2 was initially weaker but persisted for many more sessions on the 25% schedule than on the 100% schedule. The data indicate that S2-S1 pairings are responsible both for the acquisition of second-order keypecking to S2 and for the subsequent conversion of S2 into an inhibitory stimulus. |
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