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

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Molter, F; Thomas, AW; Huettel, SA; Heekeren, HR; Mohr, PNC

Published Date

  • July 2022

Published In

Volume / Issue

  • 18 / 7

Start / End Page

  • e1010283 -

PubMed ID

  • 35793388

Pubmed Central ID

  • PMC9292127

Electronic International Standard Serial Number (EISSN)

  • 1553-7358

International Standard Serial Number (ISSN)

  • 1553-734X

Digital Object Identifier (DOI)

  • 10.1371/journal.pcbi.1010283


  • eng