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The Role of Task Difficulty in Learning a Visuomotor Skill.

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Area of Science:

  • Motor learning and skill acquisition research.
  • Human motor control and performance.

Background:

  • Task difficulty is theorized to influence motor learning, potentially interfering with skill acquisition.
  • The optimal challenge point framework suggests a specific difficulty level maximizes motor learning, but empirical evidence is inconsistent.

Purpose of the Study:

  • To investigate the impact of functional task difficulty on motor skill acquisition, retention, and transfer.
  • To examine the relationship between task difficulty, perceived mental workload, and motor learning outcomes.

Main Methods:

  • Thirty-six healthy young adults practiced a mirror star-tracing task at low, medium, or hard difficulty levels.
  • Motor skill acquisition, retention, and transfer to different difficulty levels were assessed.
  • Perceived mental workload was measured during task performance.

Main Results:

  • Task difficulty significantly influenced motor performance but did not alter the overall magnitude of motor learning or skill transfer.
  • For participants practicing at medium and hard difficulty, initial skill level correlated with the degree of learning.
  • No significant effect of task difficulty on the magnitude of visuomotor skill learning was observed.

Conclusions:

  • The optimal challenge point framework is insufficient to explain the nuanced relationship between task difficulty and motor learning.
  • Perceived mental workload likely mediates previously observed effects of task difficulty on motor learning.
  • While task difficulty did not change learning magnitude, it influenced the learning process, with implications for athletic training and neurorehabilitation.