Validation and investigation psychometric properties of the Nepean Dysphoria Scale among Iranian students

Subject Areas : Clinical

Soheila maboud ^{1 *} , Mohammad Shadbafi ² , Touraj Hashemi ³

1 - M.A in Clinical Psychology, Faculty of Education and Psychology, University of Tabriz, Tabriz, Iran
2 - Ph. D Student, Department of Psychology, Faculty of Education and Psychology, University of Tabriz, Tabriz, Iran
3 - Professor, Department of Psychology, Faculty of Education and Psychology, University of Tabriz, Tabriz, Iran

Received: 2023-08-29 Accepted : 2023-10-07 Published : 2025-09-18

Keywords: Reliability, Dysphoria, Validity, Psychometric Properties,

Abstract :

Dysphoria is a psychiatric concept that includes a wide range of mental disorders. The purpose of this study was to determine the psychometric properties of the Nepean Dysphoria Scale (NDS). In this correlational descriptive study, 507 students (268 females and 239 males) of Tabriz University were selected by random sampling method and completed The Nepean Dysphoria Scale (Berle & Starcevic, 2012), Inventory of Depression and Anxiety Symptoms (Watson et al, 2007) and the Self-Report Mania Scale (Altman et al, 1997). Data was analyzed through exploratory and confirmatory factor analysis and Cronbach's alpha coefficient. Results of exploratory factor analysis identified the four-factor structure of irritability, discontent, surrender and interpersonal resentment. Also, confirmatory factor analysis confirmed the fit of the four-factor structure with the data, and the internal consistency coefficient (Cronbach's alpha) of the four-factors were 0.93, 0.91, 0.93 and 0.83, respectively. Criterion validity of the scale was evaluated favorably by correlating it with the Inventory of Depression and Anxiety Symptoms (IDAS) and the Self-Report Mania Scale, and the construct's validity was confirmed by using convergent and divergent validity. In summary, the findings showed that the Nepean Dysphoria Scale has good validity (content, construct, and criterion) and sufficient reliability in Iranian students and can be used for research and treatment purposes.

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