Dyslexia Other Definitions

Definition | Diagnostic Criteria | Age at Onset | Associated Features of Dyslexia | Alternate Definitions | Educational Approach | Genetics | Dyslexia Test



V. Alternate definitions and sub classifications


alexia -inability to read ( Council on Scientific Affairs, 1989).

agraphia -inability to write (Council on Scientific Affairs, 1989).

developmental auditory imperception - difficulty learning sounds, sound-symbol relationships and the meaning of words (Dyslexia informational packet, 1994).

dysphasia - difficulty learning both receptive and expressive oral language (Dyslexia informational packet, 1994).


dysphonetic --poor symbol-sound association (Council on Scientific Affairs, 1989).

dyseidetic --poor visual recognition (Council on Scientific Affairs, 1989).

linear dyslexia -- poor visual tracking skills (Council on Scientific Affairs, 1989).

surface dyslexia -- this is marked by the inability to read words by sight; these individuals read words only by sounding them out phonologically.

This form of dyslexia is usually a result of a specific lesion in the posterior/parietal region in the brain (Rosenhan, et. al., 1989).

phonological dyslexia -- this is marked by the inability to pronounce a written word that has never been seen, even if it corresponds to a spoken word that the individual already knows. There is damage to the system involved in reading by sound, typically as a result of a specific lesion in the posterior part of the left hemisphere (Rosenhan, et. al., 1989).


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