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Is the perceived present a predictive model of the objective present?

White, Peter A. 2018. Is the perceived present a predictive model of the objective present? Visual Cognition 26 (8) , pp. 624-654. 10.1080/13506285.2018.1530322

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Processing latencies for coherent, high level percepts in vision are at least 100 ms and possibly as much as 500 ms. Processing latencies are less in other modalities, but still significant. This seems to imply that perception lags behind reality by an amount equal to the processing latency. It has been proposed that the brain can compensate for perceptual processing latencies by using the most recent available information to extrapolate forward, thereby constructing a model of what the world beyond the senses is like now. The present paper reviews several lines of evidence relating to this hypothesis, including the flash-lag effect, motion-induced position shifts, representational momentum, static visual illusions, and motion extrapolation at the retina. There are alternative explanations for most of the results but there are some findings for which no competing explanation has yet been proposed. Collectively, the evidence for extrapolation to the present is suggestive but not yet conclusive. An alternative account of compensation for processing latencies, based on the hypothesis of rapid emergence of percepts, is proposed.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Publisher: Taylor & Francis (Routledge): STM, Behavioural Science and Public Health Titles / Taylor & Francis (Routledge)
ISSN: 1350-6285
Date of First Compliant Deposit: 12 October 2018
Date of Acceptance: 25 September 2018
Last Modified: 10 Mar 2020 15:05

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