I am very curious about this myself. DD10 is going through vision therapy right now for convergence and double vision. She did score very poorly on the Naglieri Non-verbal abilities test (69%) they gave her during testing for the gifted program. At the time, I was surprised at her scores Luckily, parent/teacher reports and a creative thinking test were given equal weight to the NNAT test and she was given gifted services. I have always wondered if her scores would improve after we complete her therapy sessions. Let us know what you find out!