Stochastic Motion Stimuli Influence Perceptual Choices in Human Participants

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Abstract

In the study of perceptual decision making, it has been widely assumed that random fluctuations of motion stimuli are irrelevant for a participant's choice. Recently, evidence was presented that these random fluctuations have a measurable effect on the relationship between neuronal and behavioral variability, the so-called choice probability. Here, we test, in a behavioral experiment, whether stochastic motion stimuli influence the choices of human participants. Our results show that for specific stochastic motion stimuli, participants indeed make biased choices, where the bias is consistent over participants. Using a computational model, we show that this consistent choice bias is caused by subtle motion information contained in the motion noise. We discuss the implications of this finding for future studies of perceptual decision making. Specifically, we suggest that future experiments should be complemented with a stimulus-informed modeling approach to control for the effects of apparent decision evidence in random stimuli.

Details

Original languageEnglish
Article number749728
Pages (from-to)749728
JournalFrontiers in Neuroscience
Volume15
Issue number15
Publication statusPublished - 2 Mar 2022
Peer-reviewedYes

External IDs

PubMed 35309084
Scopus 85126790147

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