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The suboptimality of perceptual decision making with multiple alternatives

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  • Jiwon Yeon

    (Georgia Institute of Technology)

  • Dobromir Rahnev

    (Georgia Institute of Technology)

Abstract

It is becoming widely appreciated that human perceptual decision making is suboptimal but the nature and origins of this suboptimality remain poorly understood. Most past research has employed tasks with two stimulus categories, but such designs cannot fully capture the limitations inherent in naturalistic perceptual decisions where choices are rarely between only two alternatives. We conduct four experiments with tasks involving multiple alternatives and use computational modeling to determine the decision-level representation on which the perceptual decisions are based. The results from all four experiments point to the existence of robust suboptimality such that most of the information in the sensory representation is lost during the transformation to a decision-level representation. These results reveal severe limits in the quality of decision-level representations for multiple alternatives and have strong implications about perceptual decision making in naturalistic settings.

Suggested Citation

  • Jiwon Yeon & Dobromir Rahnev, 2020. "The suboptimality of perceptual decision making with multiple alternatives," Nature Communications, Nature, vol. 11(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17661-z
    DOI: 10.1038/s41467-020-17661-z
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