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Precocity of fine motor control and task context: hitting a ball while stepping
Florence Rosey1, Eveline Marie Elisabeth Golomer, Jean Keller
1Laboratoire EA 4070 Equipe Action, Mouvement, Adaptation, Université René Descartes, Paris, France. florence.rosey@wanadoo.fr
Journal of Motor Behavior
|July 17, 2008
Summary
Three-year-olds can hit a moving ball while stepping, demonstrating temporal coupling between their movements and the ball's trajectory. This suggests the motor system implicitly anticipates object motion.
Area of Science:
- Developmental Psychology
- Motor Control
- Biomechanics
Background:
- Understanding the development of interceptive actions in young children is crucial for cognitive and motor skill development.
- Previous research has explored reaching and grasping, but intercepting moving objects while stepping presents unique challenges.
Purpose of the Study:
- To investigate the ability of children under 5 years old to intercept a moving object while stepping.
- To analyze the temporal coordination between the child's hand movement and the object's motion.
Main Methods:
- Nine 3-year-old children participated in the study.
- Children were tasked with hitting a ball dropped from varying heights (1.5 to 3.5 m) down a ramp.
- Hand movement and initiation times were recorded and statistically analyzed in relation to ball rolling times.
Main Results:
- Children under 5 successfully hit the moving ball.
- Hand movement times remained consistent across different ball drop heights.
- Hand initiation times were significantly influenced by the ball's rolling time, indicating temporal adaptation.
- A temporal coupling was observed between the ball's displacement and the child's hand contact.
Conclusions:
- Young children possess the capability to intercept moving objects while simultaneously stepping.
- Their motor system demonstrates an implicit understanding of object dynamics and temporal prediction.
- This ability highlights a sophisticated interplay between the motor and cognitive systems in early development.
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