Validation of the psychometric properties of cognitive fusion questionnaire. A study of the factorial validity and factorial invariance of the measure among osteoarticular disease, diabetes mellitus, obesity, depressive disorder, and general populations.

The unidimensional model has both similar meanings and the same structure, but the measurement model across the groups was not the same. The study provides the first approach to CFQ to Portuguese population, as a reliable tool of general cognitive fusion. Furthermore, results indicated that CFQ has a coherent structure across multiple samples and clinical utility, as it discriminate individuals with psychological distress from those who do not.