The items for which statistics have been calculated show the Statistics tab on the Observe Questions page. The items can be either be outside ExamDeveloper (i.e., imported), or can be from within the project used in an exam form.
The Statistics tab has the following functions:
Select an Analysis Group for the item. An analysis group can contain multiple analysis sets.
|Analysis Set||Select an Analysis Set for the item.|
Displays the item Difficulty.
Displays item Discrimination.
IRTa, IRTb, IRTc
Displays item's IRT values.
Displays the number of Candidates who attempted the item.
Options (A, B, C, etc.)
Displays the Answer Options of the item.
Number of Candidates who selected the answer option.
The Score value for the answer option.
Discrimination value of the answer option.
Make sure you click Save Changes to save any changes made.