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Psychometric evaluation of the Relative Mastery Scale: An Occupational Adaptation instrument
Lorrie George-Paschal1, Nancy E Krusen2, Chia-Wei Fan3
1University of Central Arkansas, Conway, USA.
OTJR : Occupation, Participation and Health
|December 31, 2021
Summary
The Relative Mastery Scale (RMS) demonstrates strong psychometric properties for measuring internal occupational adaptation. This validated instrument is reliable for use in diverse community settings.
Area of Science:
- Occupational therapy
- Psychometrics
- Health sciences
Background:
- Client-centered instruments are crucial for value-based healthcare and community practice.
- The Relative Mastery Scale (RMS) is an instrument used in occupational therapy.
- Evaluating the psychometric properties of the RMS is essential for its reliable application.
Purpose of the Study:
- To evaluate the psychometric properties of the Relative Mastery Scale (RMS).
- To determine the validity and reliability of the RMS for measuring internal occupational adaptation.
Main Methods:
- The study involved 368 community-dwelling adults aged 18-95 years.
- Psychometric properties were examined using classical test theory and Rasch measurement models.
- Exploratory factor analysis and a partial credit model were utilized.
Main Results:
- The RMS exhibited strong internal consistency (Cronbach's alpha = .94).
- Exploratory factor analysis indicated a single dominant factor explaining 71% of variance.
- Rasch analysis confirmed unidimensionality and adequate scale functioning.
Conclusions:
- The Relative Mastery Scale (RMS) possesses sound psychometric characteristics.
- The RMS is a valid and reliable measure for monitoring internal occupational adaptation.
- The instrument is suitable for diverse populations in community-based settings.
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