@ucbalumnus Where’s 2005 in this chart? Why exclude that major change?
Not sure what you are trying to say with this random data chart. That scores shifted a tiny bit for some score deciles after redesigns? All of that is disclosed to students and families when they sign up to take the test. They don’t mention the redesigns, but they explain how the test is scored for the current students’ test.
Redesigning the test doesn’t make it invalid. In fact, test design has improved as a whole quite dramatically since 1960 and even the 1980s as understanding of assessment techniques has evolved.
Removing disjointed data from context is not going to help people understand or appreciate your point, whatever it is.