Thanks for the replies. We had him tested at 3.11 because any later would have meant risking the chance to gain early entry into school. I would've preferred to have waited until he was older. He got quite tired and distracted towards the end - 1.25 hours straight, 10 mins break then another 20 mins. The psych would not test him over 2 sessions. Would this have been more illustrative of his true abilities? Just wondering if it could be an underestimate because of these factors