http://www.childrenofthecode.org/interviews/perfetti.htm
… how many times have I written almost these words?
“Dr. Charles Perfetti: At that point it was only about comprehension. I was just struck by the fact that kids who had trouble understanding what they read, if you looked at them closely, they had trouble reading words. They either took longer or sometimes we asked the teacher to identify kids having problems and she’d say ‘Well, this kid reads words just fine but he can’t understand what he reads.’ We’d say okay and we’d go test him and we’d find out that, well yes, if you weren’t looking really closely, if you had him read a list of words he would read most of the words accurately. But if you measured the time it was taking him or the difficulty he was having, you almost always found that there was some problem in word reading.”