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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance
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Individual differences in intrinsic brain connectivity predict decision strategy.

Kelly Anne Barnes1, Kevin M Anderson2, Mark Plitt2

  • 1Section on Cognitive Neuropsychology, Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland kelly.barnes@bcm.edu.

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Summary

Individual decision-making strategies, like evidence accumulation or waiting, are linked to brain network activity. Spontaneous brain activity measured at rest predicts which strategy people use for perceptual decisions.

Keywords:
decision makingfMRIfcMRIindividual differencesstrategy

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Decision Science

Background:

  • Individual differences in decision-making strategies emerge when ample time is available.
  • Understanding the neural basis of these strategy differences is crucial for cognitive science.

Purpose of the Study:

  • To investigate the neural underpinnings of individual differences in decision-making strategies.
  • To determine if moment-to-moment brain network reconfiguration or intrinsic network properties predict strategy use.

Main Methods:

  • Utilized a motion direction discrimination task, an adaptation of a standard decision-making paradigm.
  • Employed task-evoked functional MRI (fMRI) to examine brain network dynamics during decision-making.
  • Used resting-state functional connectivity MRI (fcMRI) to assess intrinsic functional brain network properties.

Main Results:

  • Participants consistently employed one of two strategies: continuous evidence accumulation or waiting for decreased task difficulty.
  • Individual strategy selection was predicted by the level of task-evoked activation in decision-related brain regions.
  • The strength of pre-task correlated spontaneous brain activity (functional connectivity) also predicted individual strategy use.

Conclusions:

  • Spontaneous brain activity measured at rest influences and constrains strategy selection in perceptual decision-making.
  • Both dynamic, task-evoked brain activity and intrinsic network properties play a role in individual decision strategies.