Research has also shown that multiple practice tests can further improve retention and test performance. Repeatedly asking your brain to dig around and produce sought-after information creates stronger connections and retrieval pathways in the brain. In one study, students who repeatedly practiced retrieval (testing) doubled their proportion of correct responses on the final test compared to students who only practiced retrieval once.
So what can we learn from the testing effect? Not only are quizzes the way to go when we want to remember information, but also—at least when it comes to flashcards and spelling quizzes—mom was right.