... and if they get 8 out of 10, then again the answer must be that the test takers are better prepared.
No metter what, its the test takers fault. The test has to be right since the test takers didn't score the average on the guage questions. The test is always right! Heck with it all, throw away the normalization and just give us our scores.
Just kidding. I guess you are saying that if the group gets the average score on the guage questions, but does poorly overall (ie, on the rest of the questions), then the test is considered difficult and cut score adjusted downward. So there are maany itterations:
poor on guage q's vs poor, avg, good overall
average on guage q's vs poor, avg, good overall
good on guage q's vs poor, avg, good overall
Yikes, seems like a lot of work.
But I still think it can be done pretty quickly, almost instantaneously, with the right programmer. Unless there is much more to it than that.
Ed