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Updated: Jan 12, 2026
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Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
Published on: May 17, 2024
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Advancing Wrist-Worn Accelerometry for Measurement of Infant Motor Behavior
Catherine E Lang1,2,3, Jana M Iverson4, Jeffery D Konrad1,2
1Program in Physical Therapy, WashU Medicine, St. Louis, Missouri, USA.
Developmental Psychobiology
|November 6, 2025
Summary
Wearable accelerometry accurately measures infant motor behavior in structured and unstructured settings. This technology shows promise as a valid tool for assessing infant movement, complementing traditional methods.
Area of Science:
- Pediatric research
- Biomedical engineering
- Developmental psychology
Background:
- Wearable sensor technology, specifically accelerometry, is an innovative method for quantifying infant motor behavior.
- Understanding infant movement patterns is crucial for developmental assessments.
Purpose of the Study:
- To compare accelerometry data from structured (lab play) and unstructured (home) settings.
- To validate accelerometer-derived measures against video-coded behaviors and caregiver reports.
- To assess the feasibility and validity of upper limb accelerometry in infants.
Main Methods:
- Bilateral wrist-worn accelerometers were used on 176 typically developing infants (6 months adjusted age).
- Data were collected during structured laboratory toy play and a 2-day unstructured home period.
- Eleven accelerometer variables were analyzed against video-coded motor tasks and caregiver questionnaire data.
Main Results:
- Accelerometry data were successfully collected, with high usability rates comparable to questionnaire response rates.
- Movement intensity and duration measures were generally higher in structured contexts than unstructured ones.
- Accelerometer variables showed moderate correlations with video-coded behaviors but weak correlations with caregiver reports of fine motor skills.
Conclusions:
- Upper limb accelerometry is a feasible and valid tool for measuring infant motor behavior.
- This technology offers a promising addition to the existing infant motor assessment toolkit.
- Further research may explore its application in diverse infant populations and clinical settings.
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