if you can afford it test. It is exhausting second guessing yourself, wondering if you should be doing more, trying to change behaviors that are actually part of the giftedness etc. Get an answer, make appropriate plans, move on.
The over 6 thing depends on the test used. Sb5 and wj111 cog are ok before then. Just make sure your child can co-operate with the tester and is not too shy.
I would not have done my son any favours by assuming he was mildly gifted/high average when in fact he was at the top end of hg just because I thought it was wrong to test without good reason.
