9. The machine-readable medium of claim 1 wherein said instructions further cause said computing device to perform (a)-(I) for each of a plurality of question items of a question item set and to calculate a collective user competency measure for said question item set based on the stored user competency measures of each of said plurality of question items comprising said set.
9. The machine-readable medium of claim 1 wherein said instructions further cause said computing device to perform (a)-(I) for each of a plurality of question items of a question item set and to calculate a collective user competency measure for said question item set based on the stored user competency measures of each of said plurality of question items comprising said set. 10. The machine-readable medium of claim 9 wherein said calculating said collective user competency measure comprises calculating an average user competency measure for the question item set.