en گفتاردرمانی Speech Therapy پژوهشي Research <p style="text-align: justify;"><span style="font-family:times new roman;"><span style="font-size:16px;"><strong><span style="color:#0000CD;">Background and Objective:</span></strong> People with more lexical semantic abilities can be more achieved in communicating with others, and in understanding the spoken or written words or sentences of others. The aim of this study was determination and comparison of lexical semantic ability in hearing and hearing impaired adults from mild to profound levels of hearing loss.<br> <strong><span style="color:#0000CD;">Methods:</span></strong> This study is a cross-sectional descriptive analytic and non-interventional study. Lexical semantic ability of 20 normal and 73 hearing impaired (16 mild, 17 moderate, 20 severe, and 20 profound hearing impaired) evaluated by the lexical semantic test. Normal adults were 7 males and 13 females, and hearing impaired adults were 23 males and 50 females. The participant&rsquo;s age range was 18-58 years old. The lexical semantic test has 44 MCQs in its two alternate forms. Descriptive statistics, Kolmogorov-Smirnov test, U Mann Whitney test, and Kruskal-Wallis test were used for description and analysis of the data.<br> <span style="color:#0000CD;"><strong>Results:</strong></span> Statistical comparison of mean scores in two groups of hearing, and hearing impaired showed that mean scores of hearing group was significantly more. Scores of hearing, mild, moderate, and severe groups decreased respectively, but the scores of profound group was slightly more than severe group. The differences between scores of these groups were significant.<br> <span style="color:#0000CD;"><strong>Conclusion:</strong></span> According to the findings of this research, we can conclude that hearing impairment can have adverse effects on lexical semantic ability of adult persons. The other important finding of this study was that the more the hearing impairment, the more its adverse effect on lexical semantic ability.</span></span></p> Adults, Hearing, Hearing impaired, Lexical semantic, Mild, Moderate, Profound, Severe 33 39 http://fdj.iums.ac.ir/browse.php?a_code=A-10-108-3&slc_lang=en&sid=1 Fahimeh Mousavi 10031947532846001567 10031947532846001567 No Department of Speech Therapy, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran Mohammad Sadegh Jenabi 10031947532846001568 10031947532846001568 No Department of Speech Therapy, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran Mohammad Kamali 10031947532846001569 10031947532846001569 No Department of Basic Science of Rehabilitation, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran Hasan Sanei 10031947532846001570 10031947532846001570 No Department of Rehabilitation Management, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran Sanaz Azari 10031947532846001571 10031947532846001571 No Department of Speech Therapy, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran Younes Amiri-Shavaki amiriyoon@yahoo.com 10031947532846001572 10031947532846001572 Yes Department of Speech Therapy, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran