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Updated: Jun 16, 2026

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools
Published on: June 20, 2020
Measuring function in young children with impairments
Paulette M Niewczyk1, Carl V Granger
1Department of Rehabilitative Medicine, Center for Functional Assessment Research, and Uniform Data System for Medical Rehabilitation, University at Buffalo, State University of New York, Buffalo, New York, USA. pniewczyk@udsmr.org
Purpose:
To determine the psychometric properties of a new functional assessment tool, the WeeFIM 0-3 instrument, intended to measure function in young children with physical, cognitive, or developmental impairments from birth to 3 years of age. Specific aims were to determine whether differences exist in WeeFIM 0-3 ratings in children with impairments as compared with those without, controlling for age and gender, and to determine the internal consistency, validity, and hierarchical properties of the instrument.
Methods:
Cross-sectional study of 173 children with impairments and 354 without impairments.
Results:
Controlling for age, children without impairments had significantly higher mean WeeFIM 0-3 ratings than children with impairments. There were no differences in mean ratings by gender. The instrument displayed high internal consistency, construct, and predictive validity; maintained a hierarchy of item difficulty; and discriminant properties.
Conclusion:
Further reliability studies are needed to determine the instrument sensitivity and ability to detect change over time.
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