A Multiple Response question (MRQ) is like a multiple choice, except that instead of being required to make one (and only one) choice, the user is allowed to make none, one or more than one choice.
The steps required to create an MCQ are the same as creating a Multiple Choice item (MCQ) up to the point where scores are assigned: the differences are that:
(1) scores can be assigned to more than one response (choice);
(2) a unique set of choices can be configured as the only acceptable response (see screenshot below) – this makes partial credit impossible and is set using the ‘Select a group of choices as the correct answer’ option box. This is the recommended mode for summative use.