Dyslexia

Since the lexical route has a number of different components, there are a number of different ways in which it can be damaged so as to produce surface dyslexia, and so any two patients with surface dyslexia may have quite different patterns of damage in the lexical route. Two examples of such damage are (a) damage to entries in the Orthographic Input Lexicon and (b) damage to entries in the Phonological Output Lexicon. If the word pretty has been lost from the Orthographic Input Lexicon, it won't be recognized lexically, so will be read nonlexically and so will be regularized. If it has been lost from the Phonological Output Lexicon, it will be recognized when it is seen, but its pronunciation won't be retrieved from the Phonological Output Lexicon, so will have to be generated nonlexically - so again a regularization error will occur.