en پژوهشي Original Research Articles <p style="text-align: justify;"><strong>Objectives: </strong>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.<br> <strong>Materials: </strong>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.<br> <strong>Results:</strong> Right and left ear mean score increased from 71.68(&plusmn;2.19) and 58.51(&plusmn;1.71) in the 8-year-old group to 90.26(&plusmn;1.96) and 88.38(&plusmn;1.36) in 12-year-old group, respectively. The mean Right Ear Advantage (REA) decreased from 13.16(&plusmn;2.58) in the 8-year-old group to 1.88(&plusmn;2.49) in the 12-year-old group. A high stability was observed between test-retest results (P<0.0001).<br> <strong>Discussion: </strong>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.</p> Two-pair dichotic digits test, Dichotic hearing processing, Free recall paradigm 115 120 http://irj.uswr.ac.ir/browse.php?a_code=A-10-1-119&slc_lang=en&sid=1 Mitra Rezapour No Department of Audiology, Iran University of Medical Sciences, Tehran, Iran. Farzaneh Zamiri Abdollahi audiology_zamiri@yahoo.com Yes Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Maryam Delphi No Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Yones Lotfi No Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Enayat-Allah Bakhshi No Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.