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Deliberation and Procedural Automation on a Two-Step Task for Rats.

Brendan M Hasz1, A David Redish2

  • 1Graduate Program in Neuroscience, University of Minnesota Twin Cities Minneapolis, MN, United States.

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|August 21, 2018
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Summary

Rats use a mix of deliberative and procedural strategies for decision-making, with deliberation decreasing during repeated choices but persisting after unexpected events. This shows how choice control evolves within trials and blocks.

Keywords:
decision-makingmodel-basedmodel-freepath stereotypyreinforcement learningvicarious trial and error

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Cognitive Science

Background:

  • Decision-making theories propose multiple competing action-selection systems.
  • Rodent studies distinguish deliberative and procedural behaviors, noting a shift with experience.

Purpose of the Study:

  • To investigate the evolution of deliberative and procedural control within single trials and blocks of repeated choices in rats.
  • To adapt a human two-step decision-making task for rodent studies.

Main Methods:

  • Adapted a two-step task for rats to analyze choice strategies.
  • Measured vicarious trial and error (VTE) as a correlate of deliberation.
  • Assessed behavioral stereotypy as a correlate of procedural automation.

Main Results:

  • Rat choice strategies were best explained by a mixture of model-based and model-free algorithms.
  • Vicarious trial and error (VTE) correlated between choice points within trials.
  • Behavioral stereotypy increased with repeated choices, indicating procedural automation.
  • VTE decreased at the first choice point with repetition but increased at the second choice point after unexpected transitions.

Conclusions:

  • Deliberation at the start of trials may reflect changes in choice patterns.
  • Mid-trial deliberation might signify interruptions in ongoing procedural processes.
  • The study reveals dynamic shifts between deliberative and procedural control during decision-making.