The Development and Validation of the Rational and Irrational Beliefs Scale of Rational Emotive Behaviour Therapy(REBT)

Objectives In Study, the rational and irrational belief scale for REBT cognitive emotional behaviour therapy was developed. Methods The sub-factors of the scale analyzed through exploratory factor analysis showed high correlations with both rational and irrational beliefs. The confirmatory factor analysis demonstrated that the model fit was appropriate, indicating the validity and reliability of the scale. Results Cross-validation was conducted to verify the stability of the scale, and the results showed that the rational and irrational belief scale can be reliably used in the field of REBT cognitive emotional behaviour therapy. Convergent and discriminant validity results also indicated high convergent validity, ensuring the reliability and validity of the scale. Conclusions Additionally, the study analyzed the clinical usefulness of the scale by determining the optimal cutting point, sensitivity, and specificity using the depression scale as the discrimination score.