Overshadowing and CS duration: counteraction and a reexamination of the role of within-compound associations in cue competition |
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| Authors: | Heather T Sissons Gonzalo P Urcelay and Ralph R Miller |
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| Institution: | (1) Department of Psychology, State University of New York, Binghamton, NY 13902-6000, USA; |
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| Abstract: | In the present experiments, we examined the role of within-compound associations in the interaction of the overshadowing procedure
with conditioned stimulus (CS) duration, using a conditioned suppression procedure with rats. In Experiment 1, we found that,
with elemental reinforced training, conditioned suppression to the target stimulus decreased as CS duration increased (i.e.,
the CS duration effect), whereas, with compound reinforced training (i.e., the overshadowing procedure), conditioned suppression to the target stimulus
increased as CS duration increased. In subsequent experiments, we replicated these findings with sensory preconditioning and
demonstrated that extinction of the overshadowing stimulus results in retrospective revaluation with short CSs and in mediated
extinction with long CSs. These results highlight the role of the duration of the stimulus in behavioral control. Moreover,
these results illuminate one cause (the CS duration) of whether retrospective revaluation or mediated extinction will be observed. |
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