Validating and developing a shortened version of the detail and flexibility (DFlex) questionnaire for eating disorders, anxiety and depression.

Objective: To validate the original and a shortened version of the Detail and Flexibility (DFlex) Questionnaire. Method: Confirmatory factor analyses, internal consistency, and discriminant validity estimates were conducted within individuals with a diagnosis of an eating disorder (ED) (n = 124), an anxiety disorder and/or depression (n = 219), and a community sample (n = 852) (Part 1). Convergent validity of the DFlex through comparisons with the Autism Spectrum Quotient, Wisconsin Card Sorting Task, and Group Embedded Figures Task was undertaken within a combined ED and community sample (N = 68). Test‐retest reliability of the DFlex was also examined across 2 years in a community sample (N = 85) (Part 2). Results: The original factor structure of the DFlex was not supported. Hence, a shortened version, the DFlex‐Revised, was developed. Good discriminant validity was obtained for the DFlex and DFlex‐Revised, however, support for convergent validity was mixed. Finally, the 2‐year test‐retest reliability for the two DFlex versions was found to be low, suggesting potential malleability in construct over this timeframe. Conclusions: Further research is needed to validate the DFlex in clinical and non‐clinical populations using different neurocognitive tests. Test‐retest, using varied time intervals, should also be assessed. Highlights: A revised shortened version of the DFlex (DFlex‐Revised) was developed.Findings support the factor structure of the DFlex‐Revised in eating disorders, anxiety/depression, and community groups.Good internal consistency and discriminant validity were obtained for both DFlex versions.The DFlex and DFlex‐Revised demonstrated some instability over a 2‐year period. [ABSTRACT FROM AUTHOR]