the effect of mild to moderate hearing impairment on persian dichotic digit test in young children

background and aim: hearing impaired students experience binaural hearing like normal peers and school age is challenging time for using dichotic listening. lack of research was found on relationship of persian hearing impair­ed children with central auditory processing (cap). one of the aims of this study was a comparison between persian dichotic digit test (ddt) score in children with mild and moderate hearing loss (hl) and normal ones. methods: forty one hearing impaired children (16 mild hl and 25 moderate hl) and 41 subjects with normal hearing all between 7-12 years of age, in both genders (sex has no effect on this test), were selected and tested persian ddt. results from right ear/left ear scores, right ear advantage (rea) and age effect were collected and compared with normal subjects. results: results of this study showed the average of 89.07% correct scores in right ear and 82.24% in left ear. the difference between both ears was 6.83%. comparison of the right ear correct scores and left ear correct scores showed a significant rea (p<0.05). but no significant differences were seen in comparing mild and moderate hearing loss groups (p>0.05). conclusion: this study pointed out which persian ddt is not affected by mild-to-mode­rate sensory neural hearing loss. however, you­nger children need more interval time between two items to respond to the tests.