Cortical potentials evoked by confirming and disconfirming feedback following an auditory discrimination |
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| Authors: | Kenneth C. Squires Steven A. Hillyard Peter H. Lindsay |
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| Affiliation: | 1. Department of Psychology, University of California, San Diego, 92037, La Jolla, California
2. Department of Neurosciences, University of California, San Diego, 92037, La Jolla, California
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| Abstract: | Vertex potentials elicited by visual feedback (signals following an auditory intensity discrimination have been studied with eight Ss. Feedback signals which confirmed the prior sensory decision elicited small P3s, while disconfirming, feedback elicited P3s that were larger. On the average, the latency of P3 was also found to increase with increasing disparity between the judgment and. the feedback information. These effects were part bf an overall dichotomy in waveshape following confirming vs disconforming feedback. These findings are incorporated in a general model of the role of P3 in perceptual decision making. |
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