Here's another useful little feature - you can order the result sets by the amount of time the user spent taking the quiz on Question Writer Tracker. You can usually identify a user who got bored during a quiz or otherwise didn't make a proper effort at a quiz by looking at the overall time spent on the quiz.
Delete these response sets to improve the quality of the data. This allows you to better compare the relative difficulty of questions in your quiz or the overall averages without the 'click-thru' attempts polluting the data.
