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What Cruising Infants Understand about Support for Locomotion
Sarah E Berger1, Gladys L Y Chan2, Karen E Adolph2
1The College of Staten Island and the Graduate Center, The City University of New York.
Summary
Infants understand how to use external support for walking. They adapt their cruising behavior and exploration based on handrail properties like stability and height, showing developmental changes in their perception of support.
Area of Science:
- Developmental Psychology
- Motor Control
- Biomechanics
Background:
- Infants learning to walk, or "cruising," rely on external support for balance.
- Understanding how infants perceive and utilize support is crucial for developmental studies.
Purpose of the Study:
- To investigate how infants differentiate and respond to varying properties of external support during upright locomotion.
- To examine infants' haptic exploration and gait modifications in response to different handrail conditions.
Main Methods:
- Infants "cruising" were presented with four handrail conditions: stable, large gap, wobbly, and low.
- Behavioral observations recorded infant attempts to cruise, haptic exploration, and gait adjustments.
Main Results:
- Infants selectively attempted to cruise based on handrail properties, with higher success rates on stable and large-gap handrails.
- Infants showed varied haptic exploration on wobbly handrails and modified gaits, including "knee cruising," on low handrails.
- Infants' attempts to cruise did not always align with success probability, particularly for wobbly and low handrails.
Conclusions:
- Infants demonstrate a nuanced understanding of support properties during locomotion.
- Developmental changes in the perception and utilization of external support are evident in cruising infants.
- Infants adapt their motor strategies based on the affordances and constraints of support structures.
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