I’ve picked this up from theEide Neurolearning Blog ,a study on how dyslexics are effected by background noise. Its looks at how long dyslexics take to respond to a either a pure tone or huggins pitch against background noise.
Dyslexics were overall slower than controls by about 120ms. Although we did not run a pure tone detection test in quiet (without background noise), the literature indicates that in simple reactions to pure tones, dyslexics respond as quickly as controls (e.g., Nicholson & Fawcett, 1994). Furthermore, the difference in miss-rates (but not false positive rates or response variability) between the subject groups suggest that the response time differences are not likely to be simply due to a different hearing profile, delayed motor execution or clumsiness, but are related to the processes via which the listeners detect the tonal objects in noise.