"Each year, some 90,000 aspiring doctors take the MCAT® exam, and scores of admissions teams comb through the results as part of their search for talented future physicians. That means the test needs to do its job well.
So, in 2015 the AAMC redesigned the exam, adding new topics and skills that applicants need to tackle medical school and 21st century medicine: biochemistry, psychology, sociology, and scientific reasoning.
Since then, a team of researchers has been exploring whether the updated test accurately predicts success in medical school, how well underrepresented groups fare on it, and much more. Now, for the first time, they’ve published their results in four Academic Medicine papers." …
https://news.aamc.org/research/article/how-well-does-mcat-exam-predict-success-med-school/