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. 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.
Duke Scholars
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Related Subject Headings
- Risk-Taking
- Reaction Time
- Probability
- Humans
- Fixation, Ocular
- Eye Movements
- Choice Behavior
- Bioinformatics
- 08 Information and Computing Sciences
- 06 Biological Sciences
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Risk-Taking
- Reaction Time
- Probability
- Humans
- Fixation, Ocular
- Eye Movements
- Choice Behavior
- Bioinformatics
- 08 Information and Computing Sciences
- 06 Biological Sciences