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Related Experiment Videos

Is visually guided reaching in early infancy a myth?

R K Clifton1, D W Muir, D H Ashmead

  • 1Department of Psychology, University of Massachusetts, Amherst 01003.

Child Development
|August 1, 1993
PubMed
Summary

Infants do not need to see their hands to reach and grasp objects. Proprioceptive cues, not visual guidance, enable early infant reaching and object contact in both light and dark conditions.

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Area of Science:

  • Developmental Psychology
  • Infant Motor Development
  • Sensory Integration

Background:

  • Understanding the sensory mechanisms guiding early infant motor skills is crucial for developmental research.
  • The role of visual feedback versus proprioception in infant reaching and grasping remains an area of investigation.

Purpose of the Study:

  • To determine if infants require visual sight of their hands for initial object interaction.
  • To compare the development of reaching, contacting, and grasping in light versus dark conditions.

Main Methods:

  • Tested 7 infants between 6 and 25 weeks of age.
  • Presented objects in both light and complete darkness (glowing/sounding objects).
  • Recorded age of first object contact and grasp in both conditions.

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Main Results:

  • Infants achieved first object contact at comparable ages in light (12.3 weeks) and dark (11.9 weeks).
  • First grasp occurred at similar ages in light (16.0 weeks) and dark (14.7 weeks), a nonsignificant difference.
  • Consistent object touching and grasping observed in both conditions once initiated.

Conclusions:

  • Proprioceptive cues, not visual limb guidance, are critical for early infant reaching and object contact.
  • Visual guidance of the hand is not essential for initiating or sustaining object contact during early development.