Second-order conditioning: Different outcomes in fear and eyelid conditioning |
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| Authors: | Roberta S Popik Steven D Stern Peter W Frey |
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| Institution: | 1. Northwestern University, 206 Cresap Laboratory, 60201, Evanston, Illinois
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| Abstract: | Second-order conditioning has been frequently observed with the fear response but not with the eyelid response. The present experiments manipulated the temporal relationship between the second-order and first-order stimulus on second-order conditioning trials. Our results indicated that a trace second-order procedure is not effective with either response system. Second-order fear conditioning was most prominent when the second-order CS terminated at the onset of the first-order CS. This arrangement, however, did not produce second-order eyelid CRs. In eyelid conditioning, the second-order CS appears to inhibit responding to the first-order CS which immediately follows it. |
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