Absence of ear advantage on the consonant-vowel dichotic listening test in adolescent and adult dyslexics: Specific auditory-phonetic dysfunction

Author(s): Helland, T., Faerevaag, M. K., Lyssand, E. T., Asbjornsen, A.

Journal/Book: J Clin Exp Neuropsychol. 1995; 17: P O Box 825, 2160 Sz Lisse, Netherlands. Swets Zeitlinger BV. 833-840.

Abstract: The present study investigated auditory-phonetic processing in a group of adolescent and adult reading disabled subjects. Right- and left-handed dyslexic subjects were compared with an age, sex, and handedness matched control group. All subjects were studied with a consonant-vowel version of the dichotic listening task with repeated presentations of dichotically presented pairs of CV-syllables. Left and right ear correct scores were compared for ear advantage in each of the different subgroups of subjects. The main finding was the absence of an expected right-ear advantage (REA) in the right-handed dyslexic group as compared to the right-handed normal readers. Both the dyslexic and normal left-handed groups did not show a REA. The findings are discussed within a theoretical framework that focuses on a basic auditory-phonetic processing dysfunction in developmental dyslexia that persists into adulthood.

Note: Article K Hugdahl, Univ Bergen, Dept Biol & Med Psychol, Arstadveien 21, N-5009 Bergen, Norway

Keyword(s): DEVELOPMENTAL DYSLEXIA; LEARNING-DISABILITIES; LEFT-HANDEDNESS; LANGUAGE; CHILDREN; SUBTYPES; IMMUNE; IDENTIFICATION; RELIABILITY; PERFORMANCE

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