Children with Developmental Coordination Disorder are deficient in a visuo-manual tracking task requiring predictive...

Area of Science:

• Neuroscience
• Developmental Psychology
• Motor Control

Background:

• Developmental Coordination Disorder (DCD) affects motor skill acquisition.
• Visuo-manual tracking is crucial for daily activities.
• Understanding DCD's impact on motor tasks is vital for intervention.

Purpose of the Study:

• To investigate the effect of visual feedback and target speed on visuo-manual tracking in children with DCD.
• To compare performance between children with DCD and typically developing (TD) peers.

Main Methods:

• Cross-sectional study with 40 children with DCD and 40 TD children (6-10 years old).
• Visuo-manual tracking task using a digitizing tablet and electronic pen.
• Varied target visibility (continuous vs. intermittent occlusion) and speed (30°/s vs. 60°/s).

Main Results:

• Children with DCD demonstrated significantly poorer tracking performance than TD children.
• Performance in the DCD group declined further with intermittent target occlusion and increased speed.
• DCD group's tracking speed exceeded target speed due to erratic movements.

Conclusions:

• Children with DCD exhibit marked deficits in visuo-manual tracking, particularly when visual feedback is reduced.
• Impaired predictive abilities and fine motor control contribute to poor tracking performance in DCD.
• These findings highlight the challenges DCD poses for tasks requiring dynamic visual-motor integration.