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Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
Published on: January 15, 2018
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Infant manual performance during reaching and grasping for objects moving in depth
Erik Domellöf1, Marianne Barbu-Roth2, Louise Rönnqvist1
1Department of Psychology, Umeå University , Umeå, Sweden.
Frontiers in Psychology
|August 25, 2015
Summary
Infants reaching for objects moving in depth show developmental changes in hand use and strategy. Ten-month-olds grasp objects more successfully than eight-month-olds, indicating improved motor planning.
Area of Science:
- Developmental Psychology
- Motor Control
- Infant Perception
Background:
- Limited research exists on infant manual performance for objects moving in depth.
- Understanding infant reaching and grasping is crucial for developmental milestones.
Purpose of the Study:
- To explore object-oriented strategies and hand preference in infants reaching for objects approaching in depth.
- To examine the effects of object type, size, and approach angle on infant reaching and grasping behaviors.
Main Methods:
- Investigated 8- and 10-month-old infants reaching for objects approaching from midline and diagonal positions.
- Assessed behavioral strategies, hand opening, and hand preference.
- Utilized objects of varying types and sizes to examine task constraints.
Main Results:
- 8-month-olds predominantly used right-handed reaches, irrespective of object position.
- 10-month-olds exhibited more varied strategies and ipsilateral reaches.
- 10-month-olds showed higher grasping success rates compared to 8-month-olds.
Conclusions:
- Infant reaching and grasping strategies for objects moving in depth evolve with age.
- Object motion paths may influence infant perception and motor planning for reaching and grasping.
- Findings provide insights for future research on infant depth perception and motor development.
