I suspect that you'll find computer science (my own field of study) is very highly represented. Maybe even a majority. That's because within our field, any false beliefs and sloppy thinking eventually surface in the form of bugs; we spend hundreds of hours searching for and fixing these problems, which is applied rationality in pure form, with feedback. All programmers are forced to get in the habit of questioning their beliefs, and for us, improving cognitive skills has a very short payback period.