en پژوهشي Original Research Article <p style="text-align: justify"><strong>Objective: </strong>The aim of the present study was to evaluate the psychometric properties and factor structure of the Matson Evaluation of Social Skills with Youngsters-II (MESSY-II) in a community population in Iran.</p> <p style="text-align: justify"><strong>Methods:</strong> The Iranian version of the MESSY-II was administered by interviewing care staff of all children and adolescents (n=355) with administratively defined intellectual disabilities (IDs) living in Tehran, Esfahan, Karaj & Kurdistan.</p> <p style="text-align: justify"><strong>Results: </strong>Exploratory factor analysis showed two factor structures (Inappropriate Assertiveness/ Impulsiveness and Appropriate Social Skills) for the MESSY-II. MESSY-II subscales demonstrated high internal consistency reliability.</p> <p style="text-align: justify"><strong>Conclusion:</strong> The present study indicates that the Persian form of MESSY-II is applicable to research on populations with varying mental functioning, diagnoses, ages, and living arrangements.</p> Social skills, MESSY-II, Factor structure, Intellectual disability 239 245 http://jpcp.uswr.ac.ir/browse.php?a_code=A-10-100-2&slc_lang=en&sid=1 Bakhtiyar Karami bak.karami@gmail.com Yes Department of Psychology, Faculty of Psychology & Educational Sciences, Kharazmi University, Tehran, Iran. Mojtaba Gashool No M.A student of General Psychology, Department of Psychology, Kharazmi University, Tehran, Iran Ali Tayarani Rad No Ph.D. student of Assessment and Measurement, Department of psychology and education, Allame tabataba,i university, Tehran, Iran Shoaib Qasemi No Ph.D. student of Assessment and Measurement, Department of psychology and education, Allame tabataba,i university, Tehran, Iran