Assessing ocular activity during performance of motor skills using electrooculography

Area of Science:

• Motor learning and control
• Neuroscience
• Sports science

Background:

• Experts demonstrate longer quiet eye (QE) durations during motor skills compared to novices.
• The precise mechanisms by which a longer QE benefits movement remain unclear.
• Interdisciplinary research and novel measurement techniques are needed to understand QE.

Purpose of the Study:

• To assess the utility of electrooculography (EOG) for measuring ocular activity during motor skill performance.
• To investigate expert-novice differences in quiet eye duration and introduce a new metric, 'eye quietness'.
• To explore the relationship between ocular activity and movement kinematics.

Main Methods:

• 10 experts and 10 novices performed golf putts while their ocular activity was recorded using EOG.
• Quiet eye duration was measured, differentiating pre- and post-movement initiation components.
• A novel 'eye quietness' index was developed, calculated from EOG variability.
• Movement duration was recorded using infrared and sound sensors.

Main Results:

• Experts showed significantly longer post-movement initiation QE durations than novices.
• No significant differences were found in total or pre-movement initiation QE durations between groups.
• Eye quietness was inversely correlated with QE duration and peaked post-movement initiation.
• Movement duration positively correlated with post-movement initiation QE and negatively with eye quietness.

Conclusions:

• Electrooculography (EOG) is a viable tool for assessing ocular activity in motor skill execution.
• Expert-novice differences in ocular activity may be linked to kinematic differences in movement execution.
• Findings suggest that post-movement eye activity and its quietness are crucial aspects of expert motor performance.