When expertise recalibrates perception: skill-dependent dissociation between perceived effort and objective force in calligraphy.

INTRODUCTION

Expertise is traditionally associated with enhanced perceptual accuracy, yet we demonstrate a paradoxical pattern in skilled motor performance: greater expertise corresponds to systematic functional recalibration of effort perception relative to objective force. This study examined how calligraphy skill development alters perceived effort and its consequences for aesthetic judgment, from an embodied cognition perspective.

METHODS

Sixty calligraphy learners (20 novices, 20 intermediates, 20 experts) wrote five standard Chinese characters while pressure sensors and surface electromyography simultaneously recorded pen-tip pressure, upper limb muscle activation, and subjective effort ratings. Professional judges evaluated the aesthetic quality of all works.

RESULTS

Results revealed systematic skill-dependent perceptual recalibration: experts' perceived effort deviated from actual pressure by 60% (recalibration index = 0.347), 4.5 times greater than novices' 15% deviation (0.078), with intermediates showing 40% deviation (0.201). This functional recalibration was strongly associated with muscle synergy reorganization (r = 0.74): experts developed a "proximal-dominant, distal-refined" activation pattern, with increased shoulder and arm muscle engagement despite reduced pen-tip pressure. Critically, in predicting aesthetic ratings, perceived effort was a powerful predictor (β = 0.58, p < 0.001) while actual pressure showed no predictive value (β = 0.02, p = 0.658). Mediation analysis revealed that perceptual recalibration accounted for 63.2% of skill level's effect on aesthetic judgment.

DISCUSSION: These findings suggest that perception in skilled performance undergoes functional recalibration to optimize task performance, reflecting an adaptive reorganization shaped by embodied experience rather than veridical representation of physical force. The systematic perceptual recalibration with expertise reveals that expert perception prioritizes task-relevant functional information over veridical physical accuracy.