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Updated: Jul 19, 2026
11:18
Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task
Published on: June 1, 2015
Walking infants adapt locomotion to changing body dimensions
1Department of Psychology, New York University, New York 10003, USA. adolph@psych.nyu.edu
Summary
Toddlers adapt their balance control when their body dimensions change, like when carrying extra weight. They perceive slopes differently based on their altered body size, impacting safe navigation.
Area of Science:
- Developmental psychology
- Biomechanics
- Motor control
Background:
- Infants' independent mobility emerges during rapid body growth.
- Changes in body dimensions and terrain alter balance constraints.
- Understanding adaptation to these changes is crucial for infant motor development.
Purpose of the Study:
- To investigate if toddlers adapt their balance control to changes in body dimensions.
- To examine how terrain variations affect toddlers' perception of safe and risky slopes.
- To assess the impact of altered body mass on infant locomotion and risk assessment.
Main Methods:
- A novel psychophysical procedure was validated for testing infant responses.
- Toddlers navigated slopes under feather-weight and lead-weight conditions.
- Infants' locomotion and risk perception on varying slopes were observed and analyzed.
Main Results:
- Lead weights significantly impaired toddlers' ability to walk down slopes.
- Toddlers treated the same slope as safe with normal body weight but risky when lead-weighted.
- Exploratory behavior at the start predicted adaptive responses on risky slopes.
Conclusions:
- Toddlers demonstrate adaptive balance control in response to altered body dimensions.
- Body mass changes influence toddlers' perception of slope safety and locomotion.
- Early exploratory activity may predict adaptive motor behaviors in challenging environments.
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