Psychometric Evaluation of the Persian Version of the Dysexecutive Questionnaire in Methamphetamine-Abstinent Individuals

Background: Methamphetamine addiction is a growing global concern associated with executive dysfunctions that negatively impact daily life. Traditional tests for assessing executive dysfunctions are often complex and time-consuming. Therefore, a valid, reliable, and simple instrument to assess these dysfunctions is crucial. This study aimed to assess the psychometric properties of the Persian version of the Dysexecutive Questionnaire in methamphetamine-abstinent individuals.Methods: A cross-sectional study was conducted with 100 participants aged 20 to 50, selected via convenience sampling. The Dysexecutive Questionnaire (informant and occupational therapist ratings), Behavioral Assessment of the Dysexecutive Syndrome, Stroop test, Wisconsin Card Sorting test, and Tower of London task were used to evaluate the participants. The study examined the face validity, convergent validity, internal consistency, test-retest reliability, and inter-rater reliability of the Dysexecutive Questionnaire. Data analysis was conducted using SPSS v.23.0 at a significance level 0.05.Results: The Dysexecutive Questionnaire demonstrated acceptable face validity (impact score: 1.95 to 3.86). Convergent validity was supported by significant correlations between the Dysexecutive Questionnaire - informant rating and other assessment tools (p < 0.001). The questionnaire showed good to excellent internal consistency (Dysexecutive Questionnaire - occupational therapist rating: α = 0.91; Dysexecutive Questionnaire - informant rating: α = 0.87). The test-retest reliability was high for the occupational therapist rating (ICC = 0.911) and informant rating (ICC = 0.925). Inter-rater reliability was also excellent (ICC = 0.980).Conclusion: The Dysexecutive Questionnaire - informant rating is a reliable and valid instrument for evaluating dysexecutive symptoms in methamphetamine-abstinent individuals.