I had a similar surprise when I first saw that data, but it does look to be solid. The conclusions drawn from it, leave a little more to be desired, as I think

I had a similar surprise when I first saw that data, but it does look to be solid. The conclusions drawn from it, leave a little more to be desired, as I think these newer studies seem to forget that there have been numerous studies regarding SAT/ACT's and GPA as predictors for college success. I'm not an expert on this topic, so I googled a few older studies, (and skimmed them). The trend of SAT/ACTs being relatively good predictors for college GPA's seems to continue up until around 2008, at which point it starts to diverge more appreciably. (2001) https://pdfs.semanticscholar.org/e2a8/25cfc687ce1be8be48a693f08c8caf5da4f6.pdf https://pdfs.semanticscholar.org/e2a8/25cfc687ce1be8be48a693... (2003) https://eml.berkeley.edu/~jrothst/publications/rothstein_sat_jmetrics2004.pdf https://eml.berkeley.edu/~jrothst/publications/rothstein_sat... (2006) https://files.eric.ed.gov/fulltext/ED563073.pdf https://files.eric.ed.gov/fulltext/ED563073.pdf (2008) https://www.sciencedirect.com/science/article/abs/pii/S0160289608000603 https://www.sciencedirect.com/science/article/abs/pii/S01602... There are tons of variables to all of this, but its a hard sell to suggest that SAT's have always been poor predictors of college GPA. To me, it seems more likely that changes to both the testing and to the way colleges are run over the past ~30+ years is likely the root cause. College was already like glorified HS when I was there, I can only imagine how bad its gotten over the past few years. And if college is copying high school, is it really surprising that HS GPA is aligning with college GPA's?