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Comparative Laterality in (central) auditory processing disorders and dyslexia


Laterality may be assessed through dichotic testing and is a measure of hemispheric brain functioning and specialization. It is generally documented that the left hemisphere is specialized for language and the right for music and speech prosody. Scientific references of dichotic digits are numerous and include a Greek dichotic digits test.

Materials and methods

The Greek dichotic digits test was digitalized with simultaneous removal of noise and optimization of speech quality. The test was then administered at a supra-threshold level through headphones in a group of children diagnosed with (central) auditory processing disorders and/or dyslexia as well as in a control group.


Percentages of correct identification of digits were calculated separately for each ear and the scores were organized and analyzed according to the four subject groups. Group 1: normal children, Group 2: children diagnosed with dyslexia, Group 3: children diagnosed with (C)APD and Group 4: children diagnosed with both dyslexia and (C)APD. Mean scores for the right ear were 90.25, 86.88, 76.50 and 70.83 for groups 1,2,3 and 4 respectively and for the left ear 88, 84.58, 70.83, 70.83.


Children with (Central) Auditory Processing Disorders and children with co-existing dyslexia and (C) APD show greater difficulty in performing the dichotic digits test as opposed to normal children and children with dyslexia. This could aid in more appropriate intervention for dyslexic children.


  1. Gootjes L, Van Strien JW, Bouma A: Age effects in identifying and localising dichotic stimuli: a corpus callosum deficit?. J Clin Exp Neuropsychol. 2004, 26 (6): 826-37. Sep

    Article  Google Scholar 

  2. Moncrieff DW, Musiek FE: Interaural asymmetries revealed by dichotic listening tests in normal and dyslexic children. J Am Acad Audiol. 2002, 13 (8): 428-37. Sep

    Google Scholar 

  3. Lamm O, Epstein R: Dichotic listening in children: the reflection of verbal and attentional changes with age. J Exp Child Psychol. 1997, 65 (1): 25-42. 10.1006/jecp.1996.2359. Apr

    Article  CAS  Google Scholar 

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Open Access This article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution 2.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Iliadou, V., Kaprinis, S., Kandylis, D. et al. Comparative Laterality in (central) auditory processing disorders and dyslexia. Ann Gen Psychiatry 7 (Suppl 1), S194 (2008).

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