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Psychol Sci. 2015 Jan;26(1):89-98. doi: 10.1177/0956797614557697. Epub 2014 Nov 25.

Action-specific disruption of perceptual confidence.

Author information

1
Center for Neural Science, New York University Department of Experimental Psychology, University of Oxford sf102@nyu.edu.
2
Department of Psychology, Columbia University National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland.
3
Department of Psychology, Columbia University.
4
Department of Psychology, The City College of the City University of New York.
5
Department of Psychology, Columbia University Department of Psychology, University of California, Los Angeles.

Abstract

Theoretical models of perception assume that confidence is related to the quality or strength of sensory processing. Counter to this intuitive view, we showed in the present research that the motor system also contributes to judgments of perceptual confidence. In two experiments, we used transcranial magnetic stimulation (TMS) to manipulate response-specific representations in the premotor cortex, selectively disrupting postresponse confidence in visual discrimination judgments. Specifically, stimulation of the motor representation associated with the unchosen response reduced confidence in correct responses, thereby reducing metacognitive capacity without changing visual discrimination performance. Effects of TMS on confidence were observed when stimulation was applied both before and after the response occurred, which suggests that confidence depends on late-stage metacognitive processes. These results place constraints on models of perceptual confidence and metacognition by revealing that action-specific information in the premotor cortex contributes to perceptual confidence.

KEYWORDS:

monitoring; motor processes; open data; perception

PMID:
25425059
PMCID:
PMC4361353
DOI:
10.1177/0956797614557697
[Indexed for MEDLINE]
Free PMC Article

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