Philosophers love to find data that shows a correlation between majoring in philosophy and doing well on standardized tests, such as the GRE. Here’s the latest example of such data, showing that philosophy majors did better than other majors on the 2013 GRE.
I use such information as well, in class and in public talks, but I’m always careful to note that the direction of explanation needs to be assessed carefully. One pretty good guess as to direction of explanation is selection effect: those with a generalized ability to do better at such tests are also those with an ability to do well in philosophy, a discipline that (at its best) requires good reasoning skills as well as good communication skills, written and oral. We’d like the general public to treat the data as a reason to major in philosophy, but such a use is more befitting of politicians than philosophers.