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The effects of stimulus distribution form during trace conditioning

Three experiments examined the effect of distribution form of the trace interval on trace conditioning. In Experiments 1 and 2, two groups of rats were conditioned to a fixed-duration conditioned stimulus (CS) in a trace interval procedure; rats in Group Fix received a fixed-duration trace interval,...

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Autores principales: Bonardi, Charlotte, Jennings, Dómhnall J
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6350178/
https://www.ncbi.nlm.nih.gov/pubmed/28805148
http://dx.doi.org/10.1080/17470218.2017.1367017
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author Bonardi, Charlotte
Jennings, Dómhnall J
author_facet Bonardi, Charlotte
Jennings, Dómhnall J
author_sort Bonardi, Charlotte
collection PubMed
description Three experiments examined the effect of distribution form of the trace interval on trace conditioning. In Experiments 1 and 2, two groups of rats were conditioned to a fixed-duration conditioned stimulus (CS) in a trace interval procedure; rats in Group Fix received a fixed-duration trace interval, whereas for rats in Group Var the trace interval was of variable duration. Responding during the CS was higher in Group Var than in Group Fix, whereas during the trace interval this difference in responding reversed—Group Fix showed higher response rates than Group Var. Experiment 3 examined whether the greater response rate observed during the CS in Group Var was due to a performance effect or the acquisition of greater associative strength by the CS. Following trace conditioning, the rats from Experiment 1 underwent a second phase of delay conditioning with the same CS; a 5-s auditory stimulus was presented in compound with the last 5 s of the 15-s CS, and the unconditioned stimulus (US) was delivered at the offset of the CSs. On test with the auditory stimulus alone, subjects in Group Var showed lower response rates during the auditory stimulus than subjects in Group Fix. We interpreted these findings as evidence that the superior responding in Group Var during the CS was a result of it acquiring greater associative strength than in Group Fix.
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spelling pubmed-63501782019-02-15 The effects of stimulus distribution form during trace conditioning Bonardi, Charlotte Jennings, Dómhnall J Q J Exp Psychol (Hove) Special Issue Articles Three experiments examined the effect of distribution form of the trace interval on trace conditioning. In Experiments 1 and 2, two groups of rats were conditioned to a fixed-duration conditioned stimulus (CS) in a trace interval procedure; rats in Group Fix received a fixed-duration trace interval, whereas for rats in Group Var the trace interval was of variable duration. Responding during the CS was higher in Group Var than in Group Fix, whereas during the trace interval this difference in responding reversed—Group Fix showed higher response rates than Group Var. Experiment 3 examined whether the greater response rate observed during the CS in Group Var was due to a performance effect or the acquisition of greater associative strength by the CS. Following trace conditioning, the rats from Experiment 1 underwent a second phase of delay conditioning with the same CS; a 5-s auditory stimulus was presented in compound with the last 5 s of the 15-s CS, and the unconditioned stimulus (US) was delivered at the offset of the CSs. On test with the auditory stimulus alone, subjects in Group Var showed lower response rates during the auditory stimulus than subjects in Group Fix. We interpreted these findings as evidence that the superior responding in Group Var during the CS was a result of it acquiring greater associative strength than in Group Fix. SAGE Publications 2018-01-01 2019-02 /pmc/articles/PMC6350178/ /pubmed/28805148 http://dx.doi.org/10.1080/17470218.2017.1367017 Text en © Experimental Psychology Society 2017 http://creativecommons.org/licenses/by/4.0/ This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Special Issue Articles
Bonardi, Charlotte
Jennings, Dómhnall J
The effects of stimulus distribution form during trace conditioning
title The effects of stimulus distribution form during trace conditioning
title_full The effects of stimulus distribution form during trace conditioning
title_fullStr The effects of stimulus distribution form during trace conditioning
title_full_unstemmed The effects of stimulus distribution form during trace conditioning
title_short The effects of stimulus distribution form during trace conditioning
title_sort effects of stimulus distribution form during trace conditioning
topic Special Issue Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6350178/
https://www.ncbi.nlm.nih.gov/pubmed/28805148
http://dx.doi.org/10.1080/17470218.2017.1367017
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