I think one reason some schools like group �iq� tests (and consider results more valid) is because they are so very standardized and educators have direct control and knowledge of the test conditions and resulting group ranking.
One reason schools don�t always easily accept outside testing is their suspicion that gifted level scores are available for purchase at the right price point. Even the more progressive schools near our area have lists of �approved� psychologists for outside testing rather than accepting test results from just anyone (PhD or not).
Our local public school district (last time I checked) only seemed to trust individual evaluations conducted by district employees (concerned about keeping their jobs) or group test results.
