Absence of ear advantage on the consonant-vowel dichotic listening test in adolescent and adult dyslexics: specific auditory-phonetic dysfunction.
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.
Hugdahl
K
K
Department of Biological and Medical Psychology, University of Bergen, Norway.
Helland
T
T
Faerevaag
M K
MK
Lyssand
E T
ET
Asbjørnsen
A
A
D000328:Adult; D000367:Age Factors; D001308:Auditory Perceptual Disorders / Q000503:physiopathology*; D004007:Dichotic Listening Tests; D004410:Dyslexia / Q000503:physiopathology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D000091402:Prohibitins; D012737:Sex Factors