I apologize in advance for the length of this, but something was bothering me, I think I figured out what was bothering me, and I would be interested in thoughts from other people.
OK, so part of what was bothering me was the Yale AO’s reference to the SAT Math score. And although this could have meant nothing, it seemed odd to me in the sentence before he referred generally to both the SAT and ACT, and then he only specifically mentioned the SAT Math score.
And then as I was looking at SCOIR (although not for Yale since we don’t have Yale loaded), I was beginning to get this feeling that despite the official concordance being marked out on SCOIR, I was not 100% confident the SAT and ACT results were lining up neatly.
OK, so I looked at their CDS, specifically with an eye to their SAT Math subscores versus ACT math scores, and, well, it was pretty eye-opening. What I am going to do is report here the HYPSM SAT and ACT 25/50/75, both composite and then Math subscore, and I will put the official concordance in parens:
MIT
SAT Comp 1520(34)/1550(35)/1570(36)
ACT Comp 35(1540)/35(1540)/36(1590)
SAT Math 790(35)/800(36)/800(36)
ACT Math 35(780)/35(780)/36(800)
Princeton
SAT Comp 1510(34)/1540(35)/1570(36)
ACT Comp 34(1500)/35(1540)/35(1540)
SAT Math 760(34)/790(35)/800(36)
ACT Math 32(720)/34(760)/35(780)
Stanford
SAT Comp 1500(34)/1540(35)/1570(36)
ACT Comp 33(1460)/35(1540)/35(1540)
SAT Math 770(35)/790(35)/800(36)
ACT Math 32(720)/35(780)/36(800)
Harvard
SAT Comp N/A
ACT Comp (not comparable)
SAT Math 760(34)/790(35)/800(36)
ACT Math 32(720)/34(760)/35(780)
Yale
SAT Comp 1470(33)/1540(35)/1560(35)
ACT Comp 33(1460)/35(1540)/35(1540)
SAT Math 760(34)/780(35)/800(36)
ACT Math 32(720)/34(760)/35(780)
OK, observations.
Composite: not too bad, although I think at the 75th level, the ACTs seem a little low at YPS, a little high at MIT. Nothing too off, but still, this may explain why it was seeming to me that, say, a 35 was doing the same work as higher 1500s SAT composites when in theory it should not be. Except maybe at MIT.
Math subscore: here I think the wheels kinda come off. At the 75th, HYP are low. At the 50th, HYPM are low. And then at the 25th, HYP are 2 ACT scores low, and Stanford is 3!
This is a kinda big deal to me. Being a more or less full ACT score low is already pretty significant. Being 2 or 3 low, that’s really quite significant.
OK, so, maybe now I get why the Yale AO singled out the SAT when it came to the predictive Math subscore. Maybe they do not see the ACT Math as similarly predictive. If that was a widely-held view, that could help explain what I am seeing in the CDS as well.
Anyway, pretty interesting to me.