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Does Hand-Dominance Matter in Non-Standard Visuomotor Transformations?

Briasha D Jones¹, Arend W A Van Gemmert¹, Marc Dalecki¹

¹School of Kinesiology, Louisiana State University, Baton Rouge, LA, USA.

Journal of Motor Behavior

|September 16, 2020

Summary

This study found that the non-dominant hand has greater eye-hand coordination deficits in spatial planning compared to the dominant hand. Performance differences between hands decreased as eye-hand decoupling increased.

Keywords:

Eye-hand coordination cognitive-motor integration eye-hand decoupling hand asymmetries

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Area of Science:

Neuroscience
Human Motor Control
Visuomotor Transformation

Background:

Previous research on visuomotor transformations primarily focused on the dominant hand.
Understanding hand-specific differences in eye-hand coordination is crucial for various applications.

Purpose of the Study:

To investigate the role of the non-dominant hand in visuomotor transformation tasks.
To compare performance between dominant and non-dominant hands under varying eye-hand coupling and decoupling conditions.

Main Methods:

Twenty-four participants performed touchscreen tasks involving finger sliding to control a cursor.
Four action-perception conditions manipulated the relationship between finger and cursor movement planes and directions.
Performance metrics included initial direction error and path length.

Main Results:

The non-dominant hand exhibited larger initial direction errors across all conditions.
Movement trajectories were longer for the non-dominant hand, especially with minimal eye-hand decoupling.
Hand performance became similar under high eye-hand decoupling (two levels).

Conclusions:

A general deficit in spatial planning eye-hand coordination exists for the non-dominant hand.
The severity of trajectory execution deficits for the non-dominant hand is inversely related to the level of eye-hand decoupling.