The extracts below are from the post by Stephen Parker found here.
“We take no position on whether there are one or more ultimate causes of dyslexia. But we suggest that there is a common denominator in every case of dyslexia… an inability to decode. This is not to say that we claim to have identified the ultimate cause of dyslexia; for this, one would have to push the question one step back and ask why they cannot decode.” [12] (Gough, P. B., & Tunmer, W. E. (1986).)
