D
D. J. Nicholas
Researcher at University of Cambridge
Publications - 5
Citations - 431
D. J. Nicholas is an academic researcher from University of Cambridge. The author has contributed to research in topics: Measures of conditioned emotional response & Interstimulus interval. The author has an hindex of 5, co-authored 5 publications receiving 388 citations.
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The effect of the instrumental training contingency on susceptibility to reinforcer devaluation
TL;DR: In this article, two experiments investigated performance of instrumental lever pressing by rats following post-conditioning devaluation of the sucrose reinforcer produced by establishing an aversion to it, and found that the devalued sucrose would not act as an effective reinforcer on either the ratio or interval schedule.
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The potentiation effect during serial conditioning.
TL;DR: The development of suppression in rats to a target conditioned stimulus (CS) was compared in trace and serial conditioning procedures and the contribution of both the association between the CSs themselves, which is inherent in the serial procedure, and that between the target CS and the US was discussed.
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Irrelevant incentive learning during instrumental conditioning: The role of the drive-reinforcer and response-reinforcer relationships
Anthony Dickinson,D. J. Nicholas +1 more
TL;DR: It is argued that the instrumental contingency itself does not play a major role in this irrelevant incentive effect, and enhanced extinction performance depends upon the relevance of the training reinforcer to the test drive state.
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Loss of associability by a conditioned inhibitor.
TL;DR: In each of three experiments two groups of rats received inhibitory conditioning to one stimulus and the differences between the two groups during testing were due to differences in the associability of the inhibitory stimulus.
Journal ArticleDOI
Irrelevant incentive learning during training on ratio and interval schedules
Anthony Dickinson,D. J. Nicholas +1 more
TL;DR: In this article, the authors investigated the effect of a motivationally-induced change in the value of the training reinforcer on instrumental performance and found that the relative size of this irrelevant incentive effect did not depend upon whether a ratio or interval schedule was employed during training.