Please always provide an answer comment. The answer comment is essential for the learners, because it helps
to disclose the expert knowledge that was necessary to answer the question
to reveal potential errors in reasoning.
Advices for the design of answer comments
The length of an answer comment should follow the basic principle “as short as possible and as long as necessary”. If the learner has to read too much text on screen it may be tiring and demotivating.
Structure your answer text in such a way as to easily find the comments that belong to each answer possibility. E.g. with MC questions you can realize this when you always put in front to which answer the comment belongs (“To A”, “To B”, etc.).
According to the answer it can be appropriate to refer to the order of defult answers or to first answer all wrong/correct default answers.
Comment all correct and false answers because the learner wants to find out what was wrong with his/her answer.
Don´t use demotivating statements like “It should be clear to everyone that answer B is wrong” or “This task was very easy, wasn´t it.”.
The answer comment is not the right place
to provide information that elaborates the story board (→ infotext)
to introduce new findings, information concerning the patient etc. (→ infotext)
to inform about a learning setting (→ infotext)
to provide expert knowledge that exceeds the knowledge necessary to answer the question (→ expert comment).