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    Temporal rate is not a distinct perceptual metric.

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    Publication date
    2020-05
    Author
    Motala, A.
    Heron, James
    McGraw, P.V.
    Roach, N.W.
    Whitaker, D.
    Keyword
    Temporal rate
    Perceptual metric
    Brain processes
    Regular sensory signals
    Perception
    Sensory processing
    Rights
    © 2020 Nature Publishing. This work is licensed under a Creative Commons Attribution 4.0 International License. (http://creativecommons.org/licenses/by/4.0/).
    Peer-Reviewed
    yes
    
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    Abstract
    Sensory adaptation experiments have revealed the existence of ‘rate after-effects’ - adapting to a relatively fast rate makes an intermediate test rate feel slow, and adapting to a slow rate makes the same moderate test rate feel fast. The present work aims to deconstruct the concept of rate and clarify how exactly the brain processes a regular sequence of sensory signals. We ask whether rate forms a distinct perceptual metric, or whether it is simply the perceptual aggregate of the intervals between its component signals. Subjects were exposed to auditory or visual temporal rates (a ‘slow’ rate of 1.5 Hz and a ‘fast’ rate of 6 Hz), before being tested with single unfilled intervals of varying durations. Results show adapting to a given rate strongly influences the perceived duration of a single empty interval. This effect is robust across both interval reproduction and duration discrimination judgments. These findings challenge our understanding of rate perception. Specifically, they suggest that contrary to some previous assertions, the perception of sequence rate is strongly influenced by the perception of the sequence’s component duration intervals.
    URI
    http://hdl.handle.net/10454/17861
    Version
    Published version
    Citation
    Motala A, Heron J, McGraw PV, Roach NW, and Whitaker D (2020) Temporal rate is not a distinct perceptual metric. Scientific Reports. 10 (1): 8654
    Link to publisher’s version
    https://doi.org/10.1038/s41598-020-64984-4
    Type
    Article
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    Life Sciences Publications

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