<p>I doubt that the concordance would ever be anything but based on the percentiles that correlate, not what one wrong gets you etc. Although if you get only one wrong in a section on any of these tests, it will get you a very high score, that’s a given. I am wondering if the concordance tables really mean much anyway. Isn’t it the percentile that is the important factor?</p>
<p>If we want to ask why a student would be in the 99% range on one test and below 80% on a different test, it would have value to that student. There may be learning issues that were never identified. Whether one wrong shows that a student is less qualified than a perfect score is also a philosophical debate. While the Sat folks talk about score ranges, it seems that quite a few of the tippy top colleges do not find this to really be the case. When fully 25% of the admitted students have 800’s on a section, it seems like it is important to be perfect - for them.</p>
<p>Some high scorers do not match their college performance to the high score on the test. Many others do. Some who didn’t score so high go on to do great things anyway. </p>