APA Dictionary of Psychology

a form of acquired dyslexia characterized primarily by difficulties in reading pronounceable nonwords. Semantic errors are not seen in this type of dyslexia, a feature that distinguishes it from deep dyslexia. Phonological dyslexia manifested as a form of developmental dyslexia has also been described. See also surface dyslexia. [first described in 1979 by Marie-France Beauvois and Jacqueline Derouesné]