I don't think it is corrected. It does not mention that in the documentation.
When all the students get a question correct, and so I guess that the discrimination coefficient should be 0 (zero) because it has no power of discrimination but it is also not reverse discriminating, but in moodle 1.53 it is calculated to be 999.
Tim
Quiz
What is an R. Count in the item analysis?
토론이 끝났습니다. 더 이상 답변할 수 없습니다.