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The neural mechanisms underlying effort process modulated by efficacy.

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Efficacy significantly influences how people manage effort over time. High efficacy improves preparation and execution, leading to better sustained effort and performance adjustment based on feedback.

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Area of Science:

  • Cognitive Neuroscience
  • Decision Science

Background:

  • Goal-directed effort is crucial but challenged by uncertainty.
  • Managing effort stably is vital for long-term activities.
  • Efficacy's role in modulating effort processes requires deeper investigation.

Purpose of the Study:

  • To investigate how efficacy modulates the effort process.
  • To examine behavioral and neural features across preparation, execution, and feedback stages.
  • To understand the impact of efficacy on overall performance and effort stability.

Main Methods:

  • Utilized a mini-block Stroop task with electroencephalography (EEG).
  • Manipulated performance-reward contingency to assess efficacy levels.
  • Analyzed neural indicators like contingent negative variation (CNV) and beta oscillations, alongside behavioral metrics like drift rate.

Main Results:

  • High efficacy enhanced preparation, indicated by increased contingent negative variation (CNV) and beta oscillations.
  • Task execution was modulated by efficacy, reflected in drift rate and decision boundary.
  • Neural signals (CNV, beta oscillations) influenced sustained effort by modulating drift rate.
  • Feedback processing (P3b) captured adjustments in sustained effort.

Conclusions:

  • Efficacy modulates the effort process across all temporal stages: preparation, execution, and feedback.
  • High-quality preparation and execution are triggered by informative efficacy and feedback signals.
  • These signals drive adaptive adjustments in sustained effort and overall performance.