Reply to Are this year's CogAT scores age-adjusted or not?

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Reply to "Are this year's CogAT scores age-adjusted or not?"

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[quote=Anonymous][quote=Anonymous][quote]Excellent response! The huge problam that FCPS created by not adjusting for age is twofold: 
* [b]firstly, the percentiles of younger kids (say, summer '05) are lower than what they should have been 
* secondly, the percentiles of older kids (say, Fall of '04, or even earlier if they were redshirted) are higher than what they should have been[/b], as they were now estimated in comparison to a different statistical population. 
Now that's what I call a huge mess![/quote]

But you don't know that.  Adjusting for age might have made very little difference in the numbers of young vs. old 2nd graders who qualified.

You just don't have enough information to make the charge that you are making.[/quote]

Not the OP but the above argument is really weak. Of course you do not know the magnitude of the effect of this issue, but since all such tests are age-normalized, someone smarter than FCPS must know that there [b]is [/b] an effect. And even if this affects less 1% of the kids, it's still more than 100 kids (plus it changes the percentiles for everyone). Otherwise, since no one knows how kids will score, none of these tests would be age-normalized, because nobody would know what the effect might be. Accordingly, we don't know that 3rd grades would do better than 2nd graders in such tests, so let's give them all the same test and not age-adjust... Let's see what happens then![/quote]

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