normalization and reliability evaluation of persian version of two-pair dichotic digits in 8 to 12-year-old children

objectives: all subjects suspected of central auditory processing disorder (capd) were previously tested by free recall dichotic digits test (ddt). the study objective was normalization and reliability evaluation of two-pair ddt in 750 native persian subjects aged 8 to 12 years. materials: a total of 750 subjects were divided into five age groups varying between 8 years and 12 years and 11 months old. each age group had 150 subjects. ddt was tested in free recall condition. for evaluating ddt test-retest reliability, 300 participants (60 subjects in each age group) were tested again after one month. results: right and left ear mean score increased from 71.68(±2.19) and 58.51(±1.71) in the 8-year-old group to 90.26(±1.96) and 88.38(±1.36) in 12-year-old group, respectively. the mean right ear advantage (rea) decreased from 13.16(±2.58) in the 8-year-old group to 1.88(±2.49) in the 12-year-old group. a high stability was observed between test-retest results (p< 0.0001). discussion: persian version of two-pair dichotic digits exhibited proper reliability for evaluating 8 to 12-year-old subjects, and the study results can be used for evaluating the dichotic hearing function in subjects of the same age group.