[quote=Bostonian]
Even if a child is in equally good test-taking form for each test, there are random errors in test scores, which argues for averaging the scores, unless you have strong reason to believe that one set of scores is unrepresentative.
This is just a guess on my part, but I suspect the type of error you're referring to Bostonian is much smaller than the type of erratic score differences that parents of 2e kids see on testing. The example I posted about my ds getting off track on the bubble sheets was a score that was 40 percentile points lower than what we would have anticipated his score should be. With a 2e kid, it isn't terribly surprising to see errors much larger than the standard error in the test due to challenges that have nothing to do with the child's knowledge of the subject matter being tested.
polarbear
