Neural evidence for automatic value-modulated approach behaviour.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Behavioral Science

Background:

• Reward learning influences attention and behavior.
• Previous research highlights value-driven attention.
• The motor system's role in reward-guided behavior requires further investigation.

Purpose of the Study:

• To investigate how reward learning affects motor system responses to stimuli.
• To examine the neural mechanisms underlying response suppression of reward-associated stimuli.
• To determine if reward learning creates a general approach bias impacting behavior and neural activity.

Main Methods:

• Participants underwent color-reward association training.
• A go/no-go flanker task was used to assess response inhibition.
• fMRI was employed to measure brain activity in the motor cortex and cerebellum.

Main Results:

• Reduced motor cortex and cerebellum activation to low-value flankers in an irrelevant context, indicating effective suppression.
• Similar activation in these regions for high-value flankers regardless of relevance, suggesting less effective suppression.
• Motor cortex activation patterns predicted behavioral effects of flankers.

Conclusions:

• Associative reward learning induces a general approach bias.
• This bias is particularly evident when it conflicts with task goals.
• Reward learning extends value-driven attention principles to stimulus-evoked motor responses.