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[quote=Anonymous]21:33 coached, to try to get an advantage.  we do not know if it works.  My dd was not coached.  lets say that coaching works to 20 points, which might be reasonable given what I heard.  My dd's scores where 120....yours where say 136.  How do we know that your DC did better than mine from an intelligence perspective.  We can not.

So now the committee evaluates our children.  My DD's GBRS is 15 with scores around 120.  Yours is (hypothetically) 10 with  scores of 140.  They do not know who boosted.  But,, they are aware of the issues of test prep.  Tough choice.  We talk about the subjective nature of GBRS...nut not of the tests.  What if this type of test, given to 2nd graders has a high variance because of prep, kids modes, add issues, etc?  They are a single measure at a single point in time.   GBRS are based on 1.5 years of classroom observation.

Now, WISC is more reliable that CogAT, but still suffers from variance. Back when I was  in grad school, I took part in a study (as a subject) to find out the day to day variation for the test scores..Then did a WISC, and over a period of 2 weeks, I took other tests on a daily measure.   What they found was that the 'scores' could vary by as much as 30 points day to day, and it appeared to to real variation in IQ.    On a good day, 160, bad day 130.

So I am skeptical of the mass given prepable test scores. [/quote]

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