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Eye Movements in Risky Choice.

Neil Stewart1, Frouke Hermens2, William J Matthews3

  • 1University of Warwick UK.

Journal of Behavioral Decision Making
|August 16, 2016
PubMed
Summary
This summary is machine-generated.

Participants’ eye movements during risky choices reveal a simple pattern: people choose the gamble they look at more, independent of numerical values. This challenges existing decision-making theories.

Keywords:
decision under riskeye tracking

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Behavioral Economics

Background:

  • Understanding decision-making processes is crucial in behavioral economics.
  • Existing theories like prospect theory struggle to fully explain choice behavior.
  • Eye movements offer a window into cognitive processes during decision-making.

Purpose of the Study:

  • To investigate the relationship between eye movements and risky choice behavior.
  • To test predictions of prominent decision-making theories against empirical eye-tracking data.
  • To identify novel patterns in gaze behavior during simple risky choices.

Main Methods:

  • Participants made simple risky choices while their eye movements were recorded.
  • A comprehensive statistical model was developed to analyze gaze patterns.
  • Systematic variations in eye movements across time and choice options were quantified.

Main Results:

  • Minimal systematic variation in eye movements was observed during the choice process.
  • Increased fixation on similar choice options and an emerging gaze bias towards the chosen gamble were noted.
  • Eye movements strongly predicted final choice, independently of attribute values.

Conclusions:

  • Findings challenge established theories such as prospect theory and decision field theory.
  • Eye movements provide insights into decision-making beyond attribute value processing.
  • A simple gaze-contingent choice mechanism, where individuals choose what they look at most, is supported.