I remember taking one somewhere around 4th or 5th grade, but my parents never told me the results. I suspect they were low, as it was quite an introverted kid and remember being very uncomfortable with the test/examiner, just wanting to get done and leave as soon as I could. Based on my pre-95 (Mensa-accepted) SAT, GMAT, and the Mega test back in the '90s, I think I have a decent estimate.
DD14 had the same issue when we tested her in 1st grade. While she scored high enough to get into the gifted program at school, the report noted that it was likely the score underestimated her actual capability due to her lack of engagement in the testing. Later SET/DYS memberships have shown this to likely be true, though she hasn't had another formal IQ test.
