A Comparison of Two References for Using Knowledge of Performance in Learning a Motor Task

Area of Science:

• Motor Learning
• Human Movement Science
• Cognitive Psychology

Background:

• Understanding how individuals learn complex motor skills is crucial in fields like sports science and rehabilitation.
• Feedback plays a vital role in motor skill acquisition, but the optimal type of feedback remains an area of investigation.
• This study examines the effectiveness of different feedback references in a motor learning task.

Purpose of the Study:

• To investigate the relative effectiveness of knowledge of results (KR) versus a criterion template (CT) as feedback references for motor learning.
• To determine which feedback reference better facilitates the acquisition and retention of a spatially and temporally accurate arm movement.
• To explore the underlying strategies subjects employ when provided with different feedback types.

Main Methods:

• Forty-eight participants performed a right arm lever movement task requiring spatial and temporal accuracy towards four targets.
• Feedback was provided as knowledge of performance (KP), with participants receiving one of four conditions: KR only, CT only, both KR and CT, or neither.
• Acquisition (120 trials) was followed by immediate and delayed retention tests, and a reacquisition test, all without feedback except for the reacquisition phase.

Main Results:

• Knowledge of results (KR) was superior to the criterion template (CT) for improving movement timing during acquisition.
• KR also facilitated the development of the generalized motor program (GMP) associated with the most efficient movement pattern more effectively than CT.
• Delayed retention tests indicated that KR led to better learning of the most efficient GMP compared to CT.

Conclusions:

• Knowledge of results (KR) serves as a more effective reference than a criterion template (CT) for learning complex motor skills involving both spatial and temporal accuracy.
• The superiority of KR is attributed to a calibration strategy, allowing for more robust motor program learning.
• The findings have implications for designing effective feedback protocols in motor skill training and rehabilitation settings.