Evaluating handwriting in children with developmental coordination disorder (DCD): Temporal, spatial, pressure and...

Area of Science:

• Neuroscience
• Biomechanics
• Developmental Psychology

Background:

• Handwriting involves intricate sensorimotor and biomechanical processes.
• Analyzing writing kinetics and kinematics offers insights into temporal, spatial, and pressure aspects.
• Differentiating writing surface pressure from pen-grip force presents a challenge.

Purpose of the Study:

• To compare handwriting kinetics and kinematics between children with developmental coordination disorder (DCD) and typically developing (TD) children.
• To specifically examine pen grip-force and surface pressure in relation to handwriting performance.

Main Methods:

• Twenty-seven children with DCD and 27 TD children (ages 7-12) copied a passage on a computerized tablet.
• Temporal, spatial, and surface pressure data were collected via the tablet.
• Pen grip-force was measured using a wearable device.

Main Results:

• The DCD group showed significantly longer writing times and greater letter dimensions (height, width, area, spacing).
• No significant differences were found in surface pressure or maintaining pressure between groups.
• The DCD group exhibited significantly weaker grip-force with greater variance.

Conclusions:

• Weaker grip-force dynamics in children with DCD correlate with reduced legibility and prolonged writing duration.
• Findings provide crucial insights into handwriting mechanisms, particularly the role of grip force.
• Understanding these dynamics is vital for developing effective clinical interventions for DCD.