Why Flunking Exams Is Actually a Good Thing - NYTimes.com - 2 views
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the tests appear to improve subsequent performance in topics that are not already familiar, whether geography, sociology or psychology.
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Across a variety of experiments, psychologists have found that, in some circumstances, wrong answers on a pretest aren’t merely useless guesses. Rather, the attempts themselves change how we think about and store the information contained in the questions.