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Vicarious trial-and-error (VTE) is a key measure of deliberation in decision-making. New human tasks show VTE-like behavior, offering insights into resource allocation and public health.

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Area of Science:

  • Neuroscience and behavioral economics
  • Decision-making research
  • Translational neuroscience

Background:

  • Foraging tasks reveal how animals allocate limited resources, with vicarious trial-and-error (VTE) indicating deliberation in rodents.
  • VTE behavior in rodents is heightened during early learning and complex decisions.
  • Understanding human decision-making processes, especially under difficult choices, is crucial for public health.

Purpose of the Study:

  • To introduce and validate translational human versions of rodent foraging tasks ('Movie Row' and 'Candy Row').
  • To investigate human decision-making, deliberation (VTE-like behavior), and factors influencing choice.
  • To explore the relationship between VTE, delay-discounting, smoking status, and body mass index (BMI).

Main Methods:

  • Participants navigated virtual mazes ('Movie Row', 'Candy Row') to earn rewards after variable delays.
  • Decision latencies and VTE-like behaviors (pauses, reorientations) were recorded.
  • Data were compared with survey measures of delay-discounting, smoking status, and BMI.

Main Results:

  • Human participants exhibited VTE-like behavior, characterized by longer decision times and reorientations, particularly with difficult choices.
  • Willingness to wait in the task did not correlate with hypothetical reward discounting.
  • Smoking status related to hypothetical reward discounting, while overweight/obese individuals (BMI ≥ 25), especially females, showed reduced sensitivity to sunk costs and less deliberation.

Conclusions:

  • Vicarious trial-and-error (VTE) serves as a behavioral indicator of deliberation in human decision-making.
  • The 'Movie Row' and 'Candy Row' tasks are effective translational tools for studying human decision-making.
  • Findings offer potential insights into decision-making relevant to public health, particularly concerning obesity and behavioral economics.