Visual tracking behaviour of two-handed catching in boys with developmental coordination disorder

Melissa K Licari1, Jess E Reynolds1, Stephen Tidman1

  • 1School of Human Sciences, The University of Western Australia, Perth, Western Australia, Australia.

Insights

Children with developmental coordination disorder (DCD) show altered visual tracking during catching, with more frequent, shorter fixations and delayed smooth pursuit initiation. These visual processing differences impact movement organization and speed.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Motor Control

Background:

  • Developmental coordination disorder (DCD) is a motor learning disability impacting age-appropriate movement skills.
  • Visuomotor control deficits are suspected contributors to DCD-related movement difficulties.

Purpose of the Study:

  • Investigate visual tracking behavior during the task of catching in children diagnosed with DCD.
  • Compare visuomotor control strategies between children with and without DCD.

Main Methods:

  • Study included 24 boys (11 with DCD, 13 controls), aged 9.16-9.43 years.
  • Participants completed 10 central catching trials, with the best five analyzed for tracking and motor responses.

Main Results:

  • Children with DCD exhibited more frequent, shorter visual fixations before ball release.
  • The DCD group showed delayed smooth pursuit initiation during ball flight but maintained pursuit effectively once initiated.
  • Movement time was significantly slower in the DCD group, though movement initiation time was unaffected.

Conclusions:

  • Catching performance in children with DCD is influenced by difficulties in visual attention and movement organization.
  • Findings highlight the role of visuomotor processing in DCD and suggest targets for intervention.
Abstract

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