en Otorhinolaryngology Otorhinolaryngology Original Research Original Research <p style="margin-left:.5in;">&nbsp;&nbsp;<strong>&nbsp; Background: </strong>Intelligibility refers to understandability of speech; and lack of it can negatively affect children&rsquo;s overall communication effectiveness. Children with repaired cleft lip and/or cleft palate (CL/P) may experience poor speech intelligibility. This study aimed at evaluating speech intelligibility in children with repaired CL/P who had not been referred to speech-language pathology clinics for early intervention.<br> <strong>&nbsp;&nbsp; Methods:</strong> Sixty-four monolingual Persian-speaking children, 32 children with repaired CL/P, and 32 controls aged 3 to 5 years participated in this survey. Their speech intelligibility was evaluated through the Persian Speech Intelligibility Test and was normalized on children 3 to 5 years. Each speech sample was heard by a speech and language pathologist (SLP), as well as 2 nonprofessional listeners. Two objective measures of speech intelligibility including Percentage of Consonants Correct (PCC) and Percentage of Intelligible Words (PIW) were used in this research.<br> <strong>&nbsp;&nbsp; Results:</strong> Children with CL/P were significantly outperformed by their peers in PCC (p= 0.0001) and PIW (p= 0.0001). More than half of the case group had compensatory errors and 40.6% had obligatory errors. The PCC and the PIW were statistically different in children with different rates of hyper nasality (p= 0.001).<br> <strong>&nbsp;&nbsp; Conclusion: </strong>Speech intelligibility of children with CL/P is impaired due to their articulation disorders (obligatory and compensatory errors). This survey documents the necessity for speech therapy for increasing speech intelligibility in this population.<br> &nbsp;<br> &nbsp;</p> <p></p><p></p> Speech Intelligibility, Percentage Intelligible Words, Percentage Consonants Correct, Cleft Lip and/or Palate 500 504 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-2538-2&slc_lang=en&sid=1 Azadeh Safaiean safaeian.slp@gmail.com 200319475328460034151 200319475328460034151 No Department of Speech and Language Pathology, Varastegan Institute of Medical Sciences, Mashhad, Iran. Nahid Jalilevand jalilevand.n@iums.ac.ir 200319475328460034152 200319475328460034152 Yes Department of Speech and Language Pathology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. Mona Ebrahimipour mo.ebrahimipour@uswr.ac.ir 200319475328460034153 200319475328460034153 No Department of Speech Therapy, University of Social Welfare and Rehabilitation Sci-ences, Tehran, Iran. Elham Asleshirin elham@gmail.com 200319475328460034154 200319475328460034154 No Department of Speech and Language Pathology, Varastegan Institute of Medical Sciences, Mashhad, Iran. Mehran Hiradfar Hiradfarm@mums.ac.ir 200319475328460034155 200319475328460034155 No Department of Pediatric Surgery, Mashhad University of Medical Sciences, Mashhad, Iran.