My first post since registering! A great community! Interesting topic that I was only just recently pondering myself. Our DS tested at 127 FSIQ at age 6 prior to diagnosis. He re-tested at age 8....having been on medication, but not on medication the day of the test. He scored 136 FSIQ. That was 12 months ago. He recently took the ACT Explore test and his composite score as a fourth grader was 20. Focalin has been very effective for him.
I believe Pearson Corp did a study on this topic, if memory serves me correct, their conclusion was about a 5 point higher score on average while on medication. I will look for that link and try to post later. Other discussions I have found seem to point to a 5-8 point differential.
