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Rasch Analysis of the Proactive Personality Scale.

Enoch Teye-Kwadjo^1,2, Gideon P de Bruin²

¹Department of Industrial Psychology, Stellenbosch University, Matieland, South Africa; Department of Psychology, University of Ghana, Accra, Ghana.

Psychological Reports

|June 30, 2021

Summary

The Proactive Personality Scale-6 (PPS-6) reliably measures proactive personality. Rasch analysis confirmed its validity, unidimensionality, and suitability for diverse populations.

Keywords:

Rasch analysis classical test theory item response theory proactive personality

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Area of Science:

Psychological Measurement
Organizational Psychology

Background:

The Proactive Personality Scale (PPS) is a widely used measure.
Previous psychometric evaluations of the 6-item PPS (PPS-6) relied on classical test theory.
Modern test theory offers advanced methods for psychometric validation.

Purpose of the Study:

To evaluate the psychometric properties of the PPS-6 using Rasch analysis.
To provide further validity evidence for the PPS-6.
To assess the reliability and dimensionality of the PPS-6.

Main Methods:

Rasch analysis, specifically the Rasch rating scale model (RSM).
Data collected from 429 participants who completed the PPS-6.
Analysis of item fit, unidimensionality, internal consistency, differential item functioning (DIF), and rating scale suitability.

Main Results:

The PPS-6 demonstrated good fit to the Rasch model.
The scale functions as a unidimensional measure with strong internal consistency reliability.
No significant differential item functioning was observed across gender.
The response rating scale is suitable for use.

Conclusions:

The PPS-6 is a psychometrically sound and reliable instrument for assessing proactive personality.
Rasch analysis supports the use of the PPS-6 in research and practice.
The scale's properties are robust across different genders.