
However, the study found that coloured overlays had no significant impact on reading speed or the reduction of errors for either group of children.ĭr Stagg, a Senior Lecturer in Psychology at Anglia Ruskin University (ARU), said, "We found that extra-large letter spacing increases the reading speed of children both with and without dyslexia, and significantly reduces the number of words that dyslexic children skip when reading." In addition to improved reading speed for both children with dyslexia and the non-dyslexic group, the larger letter spacing also resulted in a significant reduction in the number of words being missed by the children with dyslexia. The recording was used to measure the number of errors they made - specifically missed words, added words, wrong words, and pronunciation - as well as the participants' reading time. The children were instructed to read the text out loud while being recorded. Participants read four texts with either standard or extra-large letter spacing, both with and without a coloured overlay. The participants were recruited from six UK schools in Cambridgeshire, Hertfordshire and London. The study involved 59 children aged between 11-15, 32 of whom had a statement of dyslexia, with 27 non-dyslexic children forming a control group. On average, the dyslexia group showed a 13 per cent increase in reading speed, while the comparison group of non-dyslexic children showed a 5 per cent increase in reading speed.

Published in the journal Research in Developmental Disabilities, the study discovered that text with increased space between each letter provided a benefit to both groups of children.
