Changes in stimulus salience as a result of stimulus preexposure: Evidence from aversive and appetitive testing procedures |
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| Authors: | Blair C A J Hall Geoffrey |
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| Institution: | Department of Psychology, University of York, York, England. |
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| Abstract: | In two experiments, rats received preexposure to three compound flavor stimuli, AX, BX, and CX, where X represents a saline
solution. AX and BX were presented in alternation; CX, on a separate block of trials. The value of X was then modified, being
devalued by aversive conditioning in Experiment 1, and rendered valuable by the induction of a state of salt need in Experiment
2. When given a choice between BX and CX, the rats consumed more of BX than of CX in Experiment 1, and more of CX than of
BX in Experiment 2, suggesting that B and C differed in their ability to modulate the response governed by the X element.
It was suggested that blocked preexposure to CX reduces the salience of the C stimulus but that the salience of B is maintained
by preexposure in which BX is alternated with AX. The implications of this result for the phenomenon of perceptual learning
are discussed. |
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