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Perception-action coupling in the development of visual control of posture

B I Bertenthal1, J L Rose, D L Bai

  • 1Department of Psychology, University of Virginia, Charlottesville 22903, USA. bib@virginia.edu

Journal of Experimental Psychology. Human Perception and Performance
|January 13, 1998
PubMed

Insights

Infants visually perceive and respond to moving environments even before sitting independently. This visuomotor coordination improves significantly as they gain sitting experience, enhancing postural control.

Area of Science:

  • Developmental psychology
  • Motor control
  • Visual perception

Background:

  • Infants' ability to maintain balance is crucial for development.
  • Understanding the interplay between visual input and motor responses is key to grasping developmental milestones.
  • Previous research has explored infant postural control, but the specific developmental trajectory of visuomotor coordination in response to optical flow requires further investigation.

Purpose of the Study:

  • To investigate developmental changes in the coordination between perceived optical flow and postural responses in infants.
  • To determine if infants can scale their postural sway to visual information before and during the acquisition of independent sitting skills.

Main Methods:

  • Four age groups of infants (5, 7, 9, and 13 months old) were tested.
  • Infants were seated on a force plate within a "moving room" where walls oscillated anteroposteriorly.
  • Postural sway was measured to assess responses to visual stimuli.

Main Results:

  • Infants demonstrated perception of optical flow frequency and amplitude.
  • Postural responses were scaled to the visual information, indicating visuomotor coordination.
  • This scaling ability was present before independent sitting but improved notably during the learning-to-sit phase.

Conclusions:

  • Visuomotor coordination for postural control in sitting is functional before independent sitting is achieved.
  • Experience in learning to sit refines the ability to integrate visual flow with postural adjustments.
  • These findings highlight the dynamic development of sensory-motor systems in early infancy.

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