In advocating for the GED's adoption, CASE officials pointed to the fact that based on their national norming study, some 10% of graduating high school seniors would not been able to reach the recommended cut score for issuing a GED high school equivalency diploma (American Council on Education,1945). Thus, the GED promised, finally, to provide rigor and uniformity in high school assessment- to create an independent, universal standard for the high school diploma.
10% of graduating high school seniors were not able to reach the recommended score for a GED equivalency diploma so the GED had to change the test to provide rigor and uniformity in high school assessments.