I try to get information from a number of different sources. One of them is the Harvard Business Review podcast.
This interview (http://blogs.hbr.org/ideacast/2011/11/the-myth-of-monotasking.html) occurred just before Thanksgiving. If you jump to roughly the 12:30 mark of the interview, you can get a little bit of background on when and how the multiple choice test was developed. Suffice it to say, Professor Davidson of Duke University does not have kind things to say about the continued use of the test.