APA Dictionary of Psychology

a form of acquired dyslexia characterized by multiple reading errors involving the substitution or transposition of letters within words (see paralexia). The resulting misread words are often very similar to the actual words (e.g., reading wife as life, or bug as dug). [proposed in 1973 by British neuropsychologists John C. Marshall (1939–2007) and Freda Newcombe (1925–2001)]