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Related Experiment Video

Updated: Dec 3, 2025

Author Spotlight: Validation of SICOLE-R for Assessing Cognitive and Reading Skills in Spanish-Speaking Children and Its Role in Personalized Education
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Invariance Testing of the Disablement in the Physically Active Scale.

Russell T Baker1,2, Madeline P Casanova1, Michael A Pickering1

  • 1Department of Movement Sciences, University of Idaho, Moscow.

Journal of Athletic Training
|October 28, 2020
PubMed
Summary

The 16-item Disablement in the Physically Active Scale (DPAS) lacks psychometric validity for assessing patient improvement. An 8-item DPAS shows promise, but requires further validation before clinical adoption.

Keywords:
confirmatory factor analysiscovariance modelinginstrument developmentmultigroup invariance testing

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Area of Science:

  • Rehabilitation Science
  • Clinical Measurement
  • Psychometrics

Background:

  • Evidence-based practice necessitates accurate patient outcome assessment.
  • Patient-reported outcome measures (PROMs) are crucial for evaluating care quality.
  • The Disablement in the Physically Active Scale (DPAS) is a PROM for clinicians, but requires psychometric evaluation.

Purpose of the Study:

  • To assess the psychometric properties of the DPAS in a large, diverse sample.
  • To evaluate the structural invariance of the DPAS across demographic and clinical subgroups.
  • To determine if the DPAS is a psychometrically sound measure for physically active individuals.

Main Methods:

  • Observational study design with data from 1276 physically active individuals across 22 clinical sites.
  • Confirmatory factor analysis (CFA) and multigroup invariance testing were employed.
  • Alternate model generation was used to refine the factor structure due to poor initial model fit.

Main Results:

  • The original 16-item DPAS did not meet recommended psychometric fit indices or demonstrate structural invariance.
  • An 8-item model was identified through alternate model generation that met fit recommendations.
  • The DPAS, in its 16-item form, is not recommended for use across different patient subgroups.

Conclusions:

  • The 16-item DPAS is not a parsimonious or reliable measure for assessing disablement and quality of life.
  • The use of the 16-item DPAS across various subpopulations is not advised.
  • Further cross-validation of the 8-item DPAS is necessary before its implementation in research and clinical practice.