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Visual feedback and anticipatory hand orientation during infants' reaching
1Psychology Department, University of Western Ontario, London, Canada.
Perceptual and Motor Skills
|December 1, 1989
Summary
Infants improve their reaching skills with age, developing better hand orientation and visual feedback use. By 9 months, babies efficiently grasp objects, unlike younger infants who struggle with dynamic tasks.
Area of Science:
- Developmental Psychology
- Motor Control
- Infant Perception
Background:
- Infant motor development involves complex coordination of perception and action.
- Understanding how infants adapt reaching movements is crucial for developmental studies.
Purpose of the Study:
- To investigate age-related changes in infant reaching and hand orientation adjustments.
- To examine infants' ability to use visual feedback for corrective movements.
Main Methods:
- Videorecorded reaching tasks with stationary and moving stimuli for 5, 7, and 9-month-old infants.
- Monitoring of visual fixation and hand orientation during reaching.
- Analysis of reaching efficiency and object contact.
Main Results:
- 5-month-olds showed poor hand orientation adjustment compared to 9-month-olds.
- Infants' ability to adjust hand orientation improved with age, especially when the object's orientation changed.
- 9-month-olds demonstrated superior efficiency in object contact and grasp incidence.
Conclusions:
- Infant reaching skills mature significantly between 5 and 9 months of age.
- Visual feedback plays a critical role in refining hand orientation during reaching.
- Developmental improvements enable infants to adapt to dynamic changes in their environment.