I don't know. The idea of a bonus for getting all the answers right seems fine, but why not just award that to anyone who gets all the answers right? I once took an epidemiology course from Olli Miettinen at Harvard School of Public Health, where tests were not only true-false +-1, but each question also had a space where you were supposed to enter how sure you are that your answer is right -- a number between 0 and 1. The +-1 score was then multiplied by this factor for each question before the numbers were summed. --Dan Gareth wrote: << On Monday 29 August 2011 17:46:33 Michael Kleber wrote: << Why even bother, with a true/false exam? Only two choices makes it clear that "all wrong" and "all right" are equivalent.
The 200% thing provides students with a way to say "I am very confident that all my answers are correct". Having that level of confidence and being right presumably correlates with knowing the material very well indeed -- better than can be identified merely by having got everything right, on a true/false exam -- so the exam gains a little bit of extra dynamic range.
Sometimes the brain has a mind of its own.