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Related Experiment Video

Updated: Apr 5, 2026

Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

Published on: January 15, 2018

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.

Keywords:

grasping handedness infants moving objects reaching

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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.