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Constructing an Outcome Measure of Occupational Experience: An Application of Rasch Measurement Methods.

Brett Berg1, Karen Atler, Anne G Fisher

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Journal of Applied Measurement
|April 29, 2017
PubMed
Summary

The Daily Experiences of Pleasure, Productivity, and Restoration Profile (PPR Profile) needs further development. Rasch analysis revealed issues with scale structure, reliability, and dimensionality, indicating it is not yet a robust measure of occupational experience.

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Area of Science:

  • Occupational Health
  • Psychometrics
  • Health Outcomes Research

Background:

  • The Daily Experiences of Pleasure, Productivity, and Restoration Profile (PPR Profile) is an occupational experience measure.
  • Evaluating its psychometric properties is crucial for its use as a health outcome measure.

Purpose of the Study:

  • To evaluate and develop the PPR Profile using Rasch methods.
  • To assess the rating scale structure, dimensionality, and reliability of the PPR Profile.

Main Methods:

  • Rasch analysis was applied to 263 participant PPR Profiles.
  • Analyses focused on rating scale fit, item fit, and dimensionality.
  • Person and item separation indices were calculated to assess reliability.

Main Results:

  • Most rating scale categories fit the Rasch rating scale model (RRSM), but one did not.
  • Several items did not fit the RRSM, suggesting potential secondary dimensions.
  • Reliability coefficients were low, with poor person separation, indicating limited ability to differentiate participants.

Conclusions:

  • The PPR Profile requires significant revisions to function as a reliable health outcome measure.
  • Further development is needed to improve scale structure, item fit, and overall reliability.
  • Recommendations are provided for future refinement of the PPR Profile.