Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 108, Issue 33, Pages 13852-13857Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1101328108
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Funding
- National Science Foundation
- Betty and Gordon Moore Foundation
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0922982] Funding Source: National Science Foundation
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How do we make decisions when confronted with several alternatives (e. g., on a supermarket shelf)? Previous work has shown that accumulator models, such as the drift-diffusion model, can provide accurate descriptions of the psychometric data for binary value-based choices, and that the choice process is guided by visual attention. However, the computational processes used to make choices in more complicated situations involving three or more options are unknown. We propose a model of trinary value-based choice that generalizes what is known about binary choice, and test it using an eye-tracking experiment. We find that the model provides a quantitatively accurate description of the relationship between choice, reaction time, and visual fixation data using the same parameters that were estimated in previous work on binary choice. Our findings suggest that the brain uses similar computational processes to make binary and trinary choices.
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