I've been trying to think of a way to isolate a better mental shifting
score from the Trail Making Test. I believe 1 or 2 reasearchers have
looked at Trails B-A as a way to do this. However, I was thinking of
using a ratio of (B-A)/A, which would look at the difference
proportional to the basic motor and scanning speed on A.
Any thoughts on this?
Marcello Spinella, Ph.D.