We are using moodle 2.2, and in the quiz statistics page, certain questions are highlighted pink. Some of them are where students are 90% right answers, and some are 40% right answers. Whats the reasoning behind the coloration?
Some docs here: http://docs.moodle.org/23/en/Quiz_statistics_report, but acutally it does not explain.
I had to read the code, it seems to be testing whether Discriminative efficiency < 15%.
http://docs.moodle.org/dev/Quiz_statistics_calculations gives more details.
I'm glad that I found this. I was wondering the same thing. Thanks Tim!
BTW, does this "pink highlight" behavior still existing in the latest Moodle quiz engine (Moodle 2.8.5+, and latest 2.7.x)? Just curious, thanks!
Yes.