الفهرس 
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Abstract
Introduction: The adaptation effect was originally defined as a ”progressive reduction in frequency of stuttering behavior with successive readings of the same material and later extended to include successive readings of different materials and successive repetitions of spontaneous speech tasks. Aim of this study: to explore the effect of adaptation on dysfluent speech of Arabic speaking stutterers in order to determine the different factors related to this phenomenon which may facilitate the development of proper therapeutic strategies in reading. Patients and methods: 58 monolingual Arabic-speaking Egyptian stutterers in the age range 12 years to 40 years including 29 stutterers who received previous speech therapy for their stuttering and 29 stutterers who did not receive previous speech therapy for their stuttering with fully developed language and no neurological disorders. Phoniatric unit, Mansoura University Hospitals & Mansoura specialized hospital. Methods: Subjects were asked to read aloud a passage of 140 words (The reading passage used in SSI3 and the adaptation task, it’s topic was chosen to be suitable for the variable age range of the studied group five times with no breaks in between. The whole procedure was repeated twice (after 2 hours and after 24 hours) and audio recorded. Results:. When stutterers read a passage aloud a number of times in succession, the frequency of stuttered words tends to decrease from reading to reading, this adaptation phenomenon has provided a convenient reference condition for the study of the effects of different variables on stuttering behavior. Conclusion: Arabic- speaking stutterers demonstrated reduction in the frequency of stuttered words with successive readings of the same material (adaptation effect). Key words: Stuttering- Adaptation effect- Repeated readings.