Individuals who suffer from phonological dyslexia have the opposite problem to surface dyslexics. Her research, along with Maggie Snowling's, showed that dyslexics tend to struggle with phonological processing. Such heterogeneity suggests the existence of yet unrecognised subtypes of dyslexics suffering from distinguishable deficits. Treatment of surface dyslexics involves neuropsychological rehabilitation. This suggests that M cells are underdeveloped in many dyslexics. Central dyslexics are unable to properly match the visual word to the word's meaning. Dyslexics particularly differed for combination responses, not fusion responses. The absent nonlexical module in deep dyslexics explains why patients cannot name nonwords. Studies in support of "failure of inhibition" show intact implicit processing of deep dyslexics. Changes in the DCDC2 gene are frequently found among dyslexics. A fund for dyslexics (the T.O.M. Fund) was established in his memory. Artie and Leech were sent to a school for dyslexics.