Partial credit for multiple-answer questions.

[anjones]

If the question in a quiz has multiple answers, is there a way to give the student partial credit if he or she answers one correct answer but misses the other(s)?

Example: 

4. What impact does the metaphor comparing the fire to a tower have in the excerpt?

               a. It shows that the damage was minimal because it is taller rather than broader in scope.

(correct)  b. It helps the reader visualize the immenseness of the fire.

                c. It references the first paragraphs to create an understanding of the meaning.

(correct)  d. It helps the reader feel as well as see the power in the fire.

.

If they choose one, could they get one of two points?

[James]

 @anjones  

In multiple answer quizzes, partial scoring is implemented as following.

• You divide the number of points for the question by the number of correct responses. That's how much each selected response is worth.
• For every correct response that is selected, the student gets that many points. For every incorrect response that is selected, the student loses that many points.
• The student's grade may not go negative even if they mark more incorrect responses than they mark correct responses.
• Non-selected responses do not figure into the grading. The student doesn't get anything for not answering.

To your question.

• Since there are 2 correct responses, each selected item is worth 1/2 of the possible points for the question.
• If they select one of the correct ones and select none of the incorrect ones, then they will get 1/2 of the possible points.
• If they select one of the correct ones and one of the incorrect ones, they will get 0 points since the missed one will cancel out the correct one.

In Legacy Quizzes, this is the only way to grade multiple answer questions. In New Quizzes, you can choose this method or an all-or-nothing approach.

What I shared above is a much shorter version of a document I wrote: Understanding Multiple Answers Questions 

[DanPortillo]

This did not work for me. I have two correct responses and want to make each worth a point. Yet, regardless of whether I made the question worth one point or two points, Canvas docked all the points, even if one of the answers was correct. 

[brandonrasaka]

This didn't work for me. I have several Multiple Answer questions on a Final Exam, with anywhere from 3 to 5 correct responses. In each case, the total points for the questions equals the total number of correct responses. However, Canvas is treating them as "all or nothing."

This used to work in previous semesters, but now it's not working. I wonder what happened. Any suggestions?

[arthur_maturo_2]

Sorry but this doesn't work. Either something else has changed recently or there's yet some other glitch in Canvas. 

[prof_aro]

This didn't work for my quizzes. I gave 4 options, 2 of them correct and 2 incorrect. 1 point credit. However when my student selected one correct answer and one wrong answer, he basically got a zero instead of 0.5. Ridiculous!