On Apr 5, 2016, at 11:12 PM, Karen Coyle <[log in to unmask]> wrote:

> Eric, there were studies done a few decades ago using factual questions. Here's a critical round-up of some of the studies: http://www.jstor.org/stable/25828215  Basically, 40-60% correct, but possibly the questions were not representative -- so possibly the results are really worse :(

Karen, interesting article, and thank you for bringing it to our attention. —Eric