en گفتار درمانی Speech therapy پژوهشي Original Research Articles <div style="text-align: justify;"><strong>Objectives: </strong>This paper describes the validation process of the final form of the Persian version of the Overall Assessment of the Speaker&rsquo;s Experience of Stuttering for Adults (OASES-A-P). The impact of stuttering on the Persian-speaking people who stutter was compared to other languages.&nbsp;<br> <strong>Methods:</strong> This study with a cross-sectional design involved 92 Persian-speaking adults who stutter (24 females and 68 males; mean age=20.05&plusmn;4.85 years). Face and content validity, internal consistency, test-retest reliability, and item analysis for discriminant validity were examined. The impact scores and impact ratings were calculated in total and for the sections separately.&nbsp;<br> <strong>Results:</strong> Cronbach&rsquo;s alpha and ICC proved to be high (0.98; 0.95, P<0.001 respectively). Corrected item-total correlation revealed no negative score. Mean of total impact score was 2.56(&plusmn;0.67). Impact ratings for the total impact scores were as follows: mild=8.7%, mild-to-moderate=29.3%, moderate=43.5%, moderate-to-severe=15.2%, and severe=3.3%. The impact of separate sections in a high to low order were reactions to stuttering, quality of life, general information, and communication in daily situations.&nbsp;<br> <strong>Discussion:</strong> The results of the current study offer a reliable and valid form of the OASES, which is applicable for Persian-speaking Iranian adults who stutter. The predominant impact rating of stuttering was shown to be mild-to-moderate and moderate.</div> Stuttering, Attitude, Quality of life, Persian 131 138 http://irj.uswr.ac.ir/browse.php?a_code=A-10-330-2&slc_lang=en&sid=1 Fariba Yadegari faribayadegari@yahoo.com 0000-0002-7262-2920 No Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Tahereh Sima Shirazi sm_shirazi@yahoo.com No Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Peter Howell p.howell@ucl.ac.uk 0000-0001-5361-5031 No Division of Psychology and Language Sciences, University College London, London's Global University, London, United Kingdom. Reza Nilipour rnilipour@yahoo.com 0000-0003-4180-7989 No Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Meysam Shafiei slp_shafi@yahoo.com No Department of Speech Therapy, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran. Bizhan Shafiei shafiei_al@yahoo.com 0000-0003-0868-6273 No Department of Speech Therapy, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran. Zahra Ilkhani zahra.ilkhani@yahoo.com No Department of Speech Therapy, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran. Fatemeh Satarian satarian9772@yahoo.com No Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran. Narges Jafari sonia.jafary11@gmail.com No Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Robert William Quesal r-quesal@wiu.edu 0000-0002-2527-5882 No Western Illinois University, Macomb, Illinois, United States. J. Scott Yaruss jsy@msu.edu 0000-0003-1964-575X Yes Department of Communicative Sciences and Disorders, Michigan State University, East Lansing, Michigan, United States.