The development of cued versus contextual conditioning in a predictable and an unpredictable human fear conditioning preparation |
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Authors: | Iberico Carlos Vansteenwegen Debora Vervliet Bram Dirikx Trinette Marescau Valerie Hermans Dirk |
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Affiliation: | Department of Psychology, University of Leuven, Belgium. |
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Abstract: | In this human fear conditioning study, the online development of conditioned US-expectancy to discrete cues and background contexts was measured in two groups. In the paired group (n=30), the CS was systematically followed by an aversive shock (US). In the unpaired group (n=30), CS and US were presented explicitly unpaired. Using US-expectancy ratings, we replicated the basic finding already illustrated in humans with startle modulation. In the paired group, the CS elicited more US-expectancy than the context, whereas in the unpaired group, the context elicited more US-expectancy than the CS. Interestingly, we also observed a trial-by-trial development of conditioning to the context in the unpaired group as indicated by a significant linear trend. This gradual development and the evidence for the role of US-expectancy in contextual fear add to the idea that cued and contextual fear rely on the same basic associative processes. |
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Keywords: | 2343 2360 2560 3211 |
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