en Psychiatry Psychiatry Original Research: Clinical Science Original Research: Clinical Science Background: This study investigated the applicability of the Post-traumatic Stress Disorder Symptom Scale (PSS) in a group of adolescents who had been directly involved in a disaster in Tehran. Method: Participants were 20 adolescents who had survived a boat sinking in Tehran's city park in 2002. The assessment measures used were the Post-traumatic Stress Disorder Symptom Scale (PSS) and clinical interview based on DSM-IV Results: Seventeen participants (85%) were diagnosed with PTSD using PSS and seventeen (90%) were diagnosed with PTSD by psychiatric interview. Conclusion: The PSS appears to be an effective and efficient method of screening for PTSD. PTSD, Scale, disaster, PSS 345 348 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-298-24&slc_lang=en&sid=1 MAHMOUD MIRZAMANI Mirzamani2003@yahoo.co.uk 20031947532846003285 20031947532846003285 Yes the Behavioral Sciences Research Center, Baqiyatallah University of Medical Sciences MOHAMMAD REZA MOHAMMADI 20031947532846003286 20031947532846003286 No MOHAMMAD ALI BESHARAT 20031947532846003287 20031947532846003287 No