Gaze-dependent evidence accumulation predicts multi-alternative risky choice behaviour

Choices are influenced by gaze allocation during deliberation, so that fixating an alternative longer leads to increased probability of choosing it. Gaze-dependent evidence accumulation provides a parsimonious account of choices, response times and gaze-behaviour in many simple decision scenarios. H...

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Bibliographic Details
Published in:PLoS computational biology 2022-07, Vol.18 (7), p.e1010283
Main Authors: Molter, Felix, Thomas, Armin W, Huettel, Scott A, Heekeren, Hauke R, Mohr, Peter N C
Format: Article
Language:English
Subjects:
Accumulation
Attraction
Biology and Life Sciences
Choice Behavior - physiology
Computer and Information Sciences
Consumer goods
Decision making
Expected utility
Eye Movements
Fixation, Ocular
Gaze
Humans
Physical Sciences
Preferences
Probability
Psychological aspects
Psychological research
Reaction Time - physiology
Research and Analysis Methods
Risk-Taking
Risk-taking (Psychology)
Social Sciences
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Summary:Choices are influenced by gaze allocation during deliberation, so that fixating an alternative longer leads to increased probability of choosing it. Gaze-dependent evidence accumulation provides a parsimonious account of choices, response times and gaze-behaviour in many simple decision scenarios. Here, we test whether this framework can also predict more complex context-dependent patterns of choice in a three-alternative risky choice task, where choices and eye movements were subject to attraction and compromise effects. Choices were best described by a gaze-dependent evidence accumulation model, where subjective values of alternatives are discounted while not fixated. Finally, we performed a systematic search over a large model space, allowing us to evaluate the relative contribution of different forms of gaze-dependence and additional mechanisms previously not considered by gaze-dependent accumulation models. Gaze-dependence remained the most important mechanism, but participants with strong attraction effects employed an additional similarity-dependent inhibition mechanism found in other models of multi-alternative multi-attribute choice.
ISSN:1553-7358
1553-734X
1553-7358
DOI:10.1371/journal.pcbi.1010283