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Related Experiment Video

Updated: Apr 21, 2026

A Conflict Model of Reward-seeking Behavior in Male Rats

A Conflict Model of Reward-seeking Behavior in Male Rats

Published on: February 20, 2019

Conflict acts as an implicit cost in reinforcement learning.

James F Cavanagh¹, Sean E Masters², Kevin Bath³

¹Department of Psychology, University of New Mexico, Logan Hall, 1 University of New Mexico, MSC03 2220, Albuquerque, New Mexico 87131, USA.

Nature Communications

|November 5, 2014

Summary

Response conflict impacts reinforcement learning by altering reward and punishment sensitivity in cortico-striatal systems. This study reveals how conflict influences value-based decision-making and adaptation to aversive events.

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Area of Science:

Neuroscience
Cognitive Science
Computational Psychiatry

Background:

Conflict in action selection is theorized as a cost, suggesting medio-frontal cortex involvement in adapting to aversive events.
Understanding how response conflict affects reinforcement learning and value-based decision-making is crucial for explaining adaptive behavior.

Purpose of the Study:

To investigate if response conflict modulates experienced reward and punishment values within cortical and striatal systems during reinforcement learning.
To explore the neural mechanisms underlying conflict's influence on reward-related frontal theta power and cue preference/avoidance.

Main Methods:

Electroencephalography (EEG) recordings were used to measure neural activity during a reinforcement learning task involving response conflict.
Analysis focused on the relationship between frontal theta power, cue preference, punishment sensitivity, and conflict.
Genetic polymorphisms (DARPP-32) and pharmacological manipulation (cabergoline) were employed to investigate individual differences and causal mechanisms.

Main Results:

Conflict diminished the association between reward-related frontal theta power and cue preference.
Conflict enhanced the relationship between punishment and cue avoidance.
Individual differences in conflict cost sensitivity correlated with striatal D1/D2 pathway balance, modulated by the D2 agent cabergoline.

Conclusions:

Interactive cortico-striatal systems implicitly adjust experienced reward and punishment values based on response conflict.
Conflict acts as a significant modulator of value-based learning and adaptation, particularly amplifying the aversive impact of punishment.