Unblocking with Qualitative Change of Unconditioned Stimulus
- ASU Author/Contributor (non-ASU co-authors, if there are any, appear on document)
- James Denniston Ph.D., Associate Professor and Department Chairperson (Creator)
- Institution
- Appalachian State University (ASU )
- Web Site: https://library.appstate.edu/
Abstract: Conditioned barpress suppression was used to examine the effects of qualitative
changes in the unconditioned stimulus (US) between Phases 1 and 2 of a blocking
paradigm. In Phase 1, rats received pairings of a conditioned stimulus (CS) with
footshock. In Phase 2, experimental subjects received a single trial of the same CS
or a different CS compounded with a second stimulus and followed either by a
footshock or an ice water dunking. These two USs were equated in their potential to
elicit conditioned suppression of barpressing. Less blocking of the second stimulus
(i.e., unblocking) was observed in subjects that received a qualitative change in US
between phases than in subjects for which the US was consistent between phases.
This unblocking effect is discussed with respect to the differences between various
models of conditioning and several prior successes and failures to demonstrate unblocking.
Unblocking with Qualitative Change of Unconditioned Stimulus
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Created on 9/6/2011
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Additional Information
- Publication
- Blaisdell, A. P., Denniston, J. C., & Miller, R. R. (1997). Unblocking with qualitative change of uncondtioned stimulus. Learning and Motivation, 28(2): 268-279. (May 1997) Published by Elsevier (ISSN: 1095-9122). DOI:10.1006/lmot.1996.0961
- Language: English
- Date: 1997