Arizona, Harvard, Georgetown and Northwestern each conducted individual studies that compared their students’ academic results with their entrance test scores. Georgetown said that it found “GRE scores were at least as strong a predictor of academic success at Georgetown Law as LSAT scores.”

Northwestern’s law school dean, Daniel B. Rodriguez, said its study found that the exam was “a strong predictor of first-year performance at Northwestern.” Northwestern’s study was conducted with the Educational Testing Service, the administrator of the GRE, which is used for most graduate school programs.

Georgetown Law will begin accepting GRE scores in addition to LSAT scores for applicants to its 2018 entering class. Northwestern will accept GRE scores starting with applicants to its 2019 class.

As law school enrollment has fallen in recent years, differing views about relying on LSAT scores have bubbled to the surface. Adherents argue that the exam tests the analytic and logical reasoning that are critical for law school success. Opponents maintain that the GRE’s testing of math skills achieves the same purpose.

Kellye Y. Testy, chief executive of the Law School Admission Council, said, “None of our research indicates that candidates who want to pursue law school have been deterred by the LSAT, including candidates from STEM fields,” referring to science, technology, engineering and math.

The council already announced that it would step up its schedule of LSAT exams, offering the test six times a year rather than four and removing the limit on the number of times it can be taken. The council is also embarking on a program for free online exam preparation.

The LSAT retains an old-fashioned appeal for some because it remains a relatively infrequently administered paper test compared with the GRE, which is offered often and digitally. The cost of each exam is about $200.