Affiliation:
1. United Arab Emirates University
Abstract
The purpose of this study was to examine the psychometric properties of the adapted Irrational Beliefs Inventory (IBI–34) and thus begin the process of assessing its adequacy for use in an Arab culture. The scale was translated and then administered to two samples of undergraduate students from the United Arab Emirates University. Data from 384 students were used in the main analysis, and data from 251 students were used for cross-validation. Principal components analysis (PCA) with varimax rotation followed by PCA with oblimin rotation yielded the same five components in both the main sample and the validation sample, thus consistent with the original Dutch study. Only 34 of the original 50 items were adequate to represent the five constructs. Cronbach's alpha coefficient for the overall scale was .76 and for the subscales ranged between .71 and .76, except for the Rigidity subscale, which was .54. The adapted IBI–34 correlated significantly and negatively with the General Health Questionnaire and Beck Depression Inventory, providing support for concurrent validity. Due to the non-significant differences between male and female participants on the total score of the IBI–34, the scale can be used for both sexes by summing across all items to give a total score that can be used as a general indicator of the irrational thinking.
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