Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16738
Title: Neuroimaging of Associative Learning
Authors: LEE JIE, HANS
Keywords: associative, learning, backward, blocking, retrospective, revaluation
Issue Date: 16-Mar-2009
Source: LEE JIE, HANS (2009-03-16). Neuroimaging of Associative Learning. ScholarBank@NUS Repository.
Abstract: Although there is a wealth of associative learning literature, an apparent contradiction between the results of causality judgement experiments with humans and flavour-conditioning experiments with rats continues to prevail. Demonstrations of backward blocking in human causality judgement experiments suggest that remembered stimuli undergo a reduction in association with the unconditioned stimulus (US; or its equivalent) present during learning. Conversely, demonstrations of mediated conditioning in flavour conditioning experiments with rats suggest that remembered stimuli undergo an increase in association with the US present during learning. The two experiments in this thesis demonstrated simultaneous backward blocking and mediated conditioning effects in the same species (humans) and in the same stimulus compound. In addition, neural correlates underlying these two associative learning phenomena were investigated using functional magnetic resonance imaging (fMRI). The results suggest that both retrospective revaluation and mediated conditioning may be processed in some of the same regions of the brain.
URI: http://scholarbank.nus.edu.sg/handle/10635/16738
Appears in Collections:Master's Theses (Open)

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