A large body of evidence shows which types of instruction that dyslexics need to be succes

Large-scale data from comparative studies of reading patterns in dyslexic and normal readers supports a finding of at least two prevalent and distinct varieties of developmental dyslexia. One common approach has been to differentiate a speech discrimination deficit from a visual perception impairme

Dyslexia is most commonly characterized by difficulties with learning how to decode at the word level, to spell, and to read accurately and fluently. Dyslexic individuals often have difficulty "breaking the code" of sound-letter association (the alphabetic principle), and they may also reverse or transpose letters when writing or confuse letters such as b, d, p, q, especially in childhood ( A Pictorial Example ).