Mojtaba Habibi - Ph.D in Health Psychology, Department of Health Psychology, Tehran Institute of Psychiatry, School of Behavioral Sciences and Mental Health, Iran University of MedicalSciences, Tehran, Iran
Mohsen Dehghani - Associate Professor of Family Research Institute, Shahid Beheshti University, Tehran, Iran
Minoo Pooravari - PhD Candidate of Counseling, Department of Educational Sciences and Psychology, Alzahra University, Tehran, Iran
Somaieh Salehi - Lecturer and Psychologist, PhD of Counseling, Family Research Institute, Shahid Beheshti University, Tehran, Iran

Background: Based on historical viewpoint, relationship among depression, anxiety and stress attracted clinical and theoreticalconsideration. Despite the relative overlap of these psychological disorders in general, these three syndromes are distinctive interms of theoretically and conceptually aspects.Objectives: The aim of current study is investigation confirmatory factor analysis and psychometric characteristics of Iranian versionof depression, anxiety and stress scale (DASS-42) in student’s population.Methods: The student sample n = 664 studied in current study. The method of estimation Weighted Least Squares (WLS) used toinvestigate the confirmatory factor structure of this sample. NNFI, RMR, RMSEA, CFI, AGFI, GFI, ECVI, X2, X2 / df, were used to assessthe adequacy of model fitness with data. In this study, MMPI -2 questionnaire, Cattell anxiety scale, and Beck depression inventorywere used as criterion validity.Results: The results suggest DASS-42 scale had satisfactory internal consistency, test-retest validity and concurrent reliability. Theresults showed three factors with first class fitted better with data and DASS-42 scale had desirable construct validity of studentsample.Conclusions: The resultsshowed confirmatory factor structure and validity of this tool for application usages and clinical diagnosisare acceptable.

Depression, Anxiety, Stress