<p>The above concordance link includes a page that offers the “estimated relationship” between scores on the two tests. The concordant score for 28 is 1260, the related score is 1880.</p>
<p>According to ACT.org, “Concordant scores are defined as those having the same percentile rank with respect to the group of students used in the study. The tables are useful for determining the cutoff score on one test that results in approximately the same proportion of students selected by the other test (although not necessarily the same students).” </p>
<p>I can’t quickly locate the definition of an estimated relationship score. Does anyone know why these are different? It might help explain what you are seeing with regard to Brown admissions stats.</p>