We tested at 3 and 9 months on the SBV as was required for early entry to school. The psychologist said the result was an underestimate because my son didn't quite understand some of the questions and, like nerdnproud said, by the end he didn't want to answer questions without coaxing.
I still remember sitting in the next room and I could just hear the first question: "What is an apple?" and the response: "It's a snack." Fortunately it went much better from then and the underestimate is 147. It qualified him for early entry and all the gifted programs so I don't think there is a need to retest. We know he is amazingly bright and that will guide us from now. Retesting and getting a score of 157 only confirms what we know and offers no new insights. Retesting and getting a score of 127 would confuse things and probably be contrary to what we see from him day to day.
