Adaptation of the Runco Ideational Behavior Scale into Turkish: A confirmatory factor analysis and Rasch study.

Abstract

In the present study, two commonly used versions (19-item and 23-item versions) of the Runco Ideational Behavior Scale (RIBS) were adapted into Turkish. The analyses were carried out using 2,529 responses collected from high school (n = 1,091), undergraduate (n = 735), and graduate (n = 703) students. Confirmatory factor analyses and partial credit model analyses were conducted to examine the internal structures and psychometric properties of the scales. Measurement invariance and differential item functioning analyses were performed for gender and educational level. Scores on both versions of the RIBS were highly reliable based on Cronbach's α and McDonald's ω coefficients. The confirmatory factor analyses provided evidence of a single-factor structure for the 19-item version and a two-factor structure for the 23-item version. The partial credit model analyses supported the unidimensional structure for the 19-item version and the two-dimensional structure for the 23-item version. The analyses showed that the psychometric properties of both versions were good with regard to factor loadings, item fit, item difficulty, item discrimination, and item as well as person reliability. Strong evidence of measurement invariances for gender and educational level was obtained for both versions of the RIBS. However, Item 7 on the 19-item version exhibited a large differential item functioning for educational level. Our findings suggest that the overwhelming majority of the items on both versions of the RIBS have acceptable qualities for measuring ideation in Turkish culture.