ABSTRACT
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 [P0.0001]
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