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This is to certify that your paper entitled «Internal Consistency Reliability, Construct Validity and Discriminative Validity of the Depression, Anxiety, Stress Scale-۲۱ (DASS-۲۱) in Iranian Patients with Multiple SclerosisRunning title: Internal Consistency Reliability, Construct Validity and Discriminative Validity of DASS-۲۱» was indexed with 17 pages, in the CIVILICA citation database, code COI:ISCPS11_008, after evaluation and approval of the referees of the "The 11th International Conference on Psychology, Counseling and Educational Sciences held in Tehran 2024.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.