I see group testing, such as Cogat and ITBS as different from computerized stuff like scantron. My DD had done one on one testing with a private psychologist and with the school TAG coordinator and performed at a higher level than on the true group ability testing. She did fine on COGAT and ITBS but not at the level I might have expected. She always does well on computerized stuff like scantron, though, because she looks at that as a game. She enjoys one on one testing and hates the group thing, including the state standardized testing. She views that stuff as torture. It really is individual, though, and I agree with what polarbear says.
