HE Instructor Knowledge Base URL: http://cmg.screenstepslive.com/s/MacmillanMedia/m/52442/l/550282-what-is-the-difference-between-an-incorrect-tab-and-a-default-tabHS Instructor Knowledge Base URL: http://cmg.screenstepslive.com/s/bfw_highschool_helpcenter/m/58868/l/550282-what-is-the-difference-between-an-incorrect-tab-and-a-default-tab?space_id=194&preview=true&preview=true
A Default tab will be displayed to students who enter anything that is not defined in a Correct or Incorrect tab. Think of it as a catch-all.
Incorrect tabs are used to give specific feedback for a defined incorrect answer. Of course, since the possible number of wrong entries in most modules is very large, you would also want to have a Default tab with general feedback.
When all of the possible incorrect answers can be predicted, such as in a multiple-choice question, you might want to omit a Default tab or use it only to tell the student they didn't select an answer.