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Related Experiment Video

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Bi-frontal direct current stimulation affects delay discounting choices.

David Hecht1, Vincent Walsh, Michal Lavidor

  • 1a Department of Psychology , University of Hull , Hull , UK.

Cognitive Neuroscience
|October 1, 2013
PubMed
Summary

Transcranial direct current stimulation (tDCS) influenced delay discounting. Facilitating the left dorsolateral prefrontal cortex (DLPFC) and inhibiting the right DLPFC increased immediate reward choices.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Decision Science

Background:

  • Delay discounting describes the devaluation of future rewards.
  • The prefrontal cortex plays a critical role in decision-making and impulse control.
  • Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique.

Purpose of the Study:

  • To investigate the causal effects of tDCS on delay discounting behavior.
  • To examine how modulating prefrontal cortex activity influences choices between immediate and delayed rewards.

Main Methods:

  • Participants completed delay discounting tasks under three tDCS conditions: left-hemisphere anodal/right-hemisphere cathodal, right-hemisphere anodal/left-hemisphere cathodal, and sham stimulation.
  • Choices were recorded across different monetary delays and amounts.

Main Results:

  • Participants generally preferred larger delayed rewards when the difference was significant (≥10%).
  • Left dorsolateral prefrontal cortex (DLPFC) facilitation combined with right DLPFC inhibition led to more choices of immediate, smaller gains compared to sham stimulation.

Conclusions:

  • The dorsolateral prefrontal cortex (DLPFC) is crucial for delay discounting.
  • Modulating frontal lobe activity with tDCS can alter decision-making, specifically increasing preference for immediate rewards.