File checking occurs in the check function and simply looks for files ending with a tilde (~) or pound sign (#), beginning with a pound sign, or ending with the extension .pyc.

The study author Mary Pyc, a postdoctoral fellow at Washington University in St. Louis and her co-author Katherine Rawson investigated pieces of information called "mediators."

The research done by Rawson and Pyc showed that practice tests lead learners to develop better keywords.