Psychophysical reverse correlation reflects both sensory and decision-making processes

Nature Communications
Gouki OkazawaRoozbeh Kiani

Abstract

Goal-directed behavior depends on both sensory mechanisms that gather information from the outside world and decision-making mechanisms that select appropriate behavior based on that sensory information. Psychophysical reverse correlation is commonly used to quantify how fluctuations of sensory stimuli influence behavior and is generally believed to uncover the spatiotemporal weighting functions of sensory processes. Here we show that reverse correlations also reflect decision-making processes and can deviate significantly from the true sensory filters. Specifically, changes of decision bound and mechanisms of evidence integration systematically alter psychophysical reverse correlations. Similarly, trial-to-trial variability of sensory and motor delays and decision times causes systematic distortions in psychophysical kernels that should not be attributed to sensory mechanisms. We show that ignoring details of the decision-making process results in misinterpretation of reverse correlations, but proper use of these details turns reverse correlation into a powerful method for studying both sensory and decision-making mechanisms.

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Citations

Dec 13, 2019·Cerebral Cortex·Shaun L ClohertyJude F Mitchell
Oct 30, 2018·Frontiers in Neuroscience·Kaosu MatsumoriKenji Matsumoto
Aug 10, 2019·Frontiers in Human Neuroscience·Christoph Kayser
Jan 29, 2021·Scientific Reports·Cora Kubetschek, Christoph Kayser
Mar 11, 2021·Journal of Neurophysiology·Bharath Chandra TalluriTobias H Donner
Jun 5, 2021·Current Biology : CB·Yuki Murai, David Whitney
Oct 11, 2020·Nature Communications·Niklas WilmingTobias H Donner
Jan 1, 2022·PLoS Computational Biology·Ariel Zylberberg
Feb 5, 2022·Journal of the Experimental Analysis of Behavior·Rodrigo Sosa, Emmanuel Alcalá

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