Investigating how prior knowledge influences perception and action in developmental coordination disorder.

Area of Science:

• Neuroscience
• Developmental Psychology
• Motor Control

Background:

• Developmental coordination disorder (DCD) presents with diverse motor task difficulties.
• A recent hypothesis suggests sensorimotor prediction and feedforward planning deficits underlie DCD motor impairments.

Purpose of the Study:

• To investigate if sensorimotor prediction deficits contribute to the motor challenges faced by individuals with DCD.
• To examine sensorimotor prediction using a naturalistic object-lifting task in children.

Main Methods:

• Recruited children with probable DCD and typically developing controls.
• Measured heaviness perception and fingertip force application during object interaction.
• Assessed the influence of visual size cues on force application and object weight perception.

Main Results:

• No significant differences in sensorimotor prediction metrics were found between children with and without DCD.
• No correlation was observed between sensorimotor prediction metrics and motor performance.
• Illusory misperceptions of object weight did not differ between the groups.

Conclusions:

• Sensorimotor prediction deficits are unlikely to be the primary cause of motor performance issues in simple real-world movements for children with DCD.
• The findings challenge the hypothesis that sensorimotor prediction deficits underpin the motor difficulties characteristic of DCD.