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Further validation of the Multiple Sclerosis Self-Efficacy Scale
Chung-Yi Chiu1, Robert W Motl1
1a Department of Kinesiology and Community Health , University of Illinois at Urbana-Champaign , Champaign , IL , USA.
Disability and Rehabilitation
|March 10, 2015
Summary
A modified 10-item Multiple Sclerosis Self-Efficacy (MSSE) Scale offers a valid and reliable measure for individuals with multiple sclerosis (MS). This revised scale demonstrates strong construct validity and reliability for assessing MS-specific self-efficacy.
Area of Science:
- Psychology
- Rehabilitation Medicine
- Neuroscience
Background:
- Self-efficacy is crucial for managing multiple sclerosis (MS) consequences.
- The original 18-item Multiple Sclerosis Self-Efficacy (MSSE) Scale measures self-efficacy in function and control.
- The MSSE scale's factor structure and construct validity required re-evaluation in large samples.
Purpose of the Study:
- To examine the factorial and construct validity of the Multiple Sclerosis Self-Efficacy (MSSE) Scale.
- To assess the psychometric properties of the MSSE in two distinct samples of individuals with MS.
Main Methods:
- Two independent samples of individuals with MS (n=292, n=275) completed the MSSE and other health-related measures.
- Confirmatory factor analysis (CFA) was used to test factorial validity.
- Bivariate correlations were employed to examine construct validity against measures of symptoms, dysfunction, disability, and quality of life.
Main Results:
- The original 18-item MSSE's two-factor model showed a poor fit in both samples.
- A modified 10-item version of the MSSE demonstrated a good fit for the two-factor model in both samples.
- The 10-item MSSE showed high correlations with the original scale (r=0.97) and related constructs (e.g., disability, r=0.69), with Cronbach's alpha values ranging from 0.78 to 0.94.
Conclusions:
- The modified 10-item MSSE provides a valid and reliable measure of self-efficacy in individuals with MS.
- This revised scale demonstrates good reliability and construct validity across two independent samples.
- Researchers and clinicians are encouraged to utilize the 10-item MSSE for assessing MS-specific self-efficacy.
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