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Making precise movements increases confidence in perceptual decisions.

Rémi Sanchez1, Anaïs Courant2, Andrea Desantis3

  • 1Département Traitement de l'Information et Systèmes, ONERA, Salon-de-Provence F-13661, France; Institut de Neurosciences de la Timone (UMR 7289), CNRS and Aix-Marseille Université, Marseille F-13005, France; Centre de Recherche en Psychologie et Neurosciences (UMR 7077), CNRS and Aix Marseille Université, Marseille F-13003, France.

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Decision confidence is influenced by motor response precision. Higher precision, not response fluency, increased confidence, supporting the action monitoring hypothesis in perceptual decision-making.

Keywords:
Action FluencyAction monitoringConfidenceDecision-makingMotor precision

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Decision Science

Background:

  • Perceptual decision-making often lacks explicit feedback, necessitating confidence judgments for guiding actions.
  • Motor responses play a role in modulating decision confidence, with two main hypotheses proposed: fluency and monitoring.
  • The fluency hypothesis suggests response ease enhances confidence, while the monitoring hypothesis posits heightened action monitoring boosts confidence.

Purpose of the Study:

  • To empirically test the competing fluency and monitoring hypotheses of decision confidence.
  • To investigate the influence of motor response precision on retrospective confidence in perceptual tasks.

Main Methods:

  • A pre-registered experiment was conducted involving a perceptual task requiring Gabor patch orientation discrimination.
  • Motor response precision was manipulated by varying the size of target circles for mouse-based responses (high vs. low precision).

Main Results:

  • Contrary to the fluency hypothesis, higher confidence was reported in trials requiring higher motor precision (smaller circles).
  • Increased confidence with higher precision occurred without changes in perceptual accuracy.
  • Findings support the monitoring hypothesis, indicating action monitoring influences confidence.

Conclusions:

  • The degree of action monitoring during response execution significantly influences retrospective decision confidence.
  • Response precision, rather than mere response fluency, appears to be a key factor in modulating confidence.
  • This research provides critical insights into the mechanisms underlying confidence judgments in perceptual decision-making.