DCR-4 Chapter 15 “Designing Questionnaires, Interviews, and Online Surveys”
Use check boxes (squares) to identify response options in “all-that-apply” questions.
However, checking “all that apply” does not force the respondent to consider each possible item; an unchecked box may mean the item does not apply or was simply overlooked. It is better to ask respondents to mark each possible answer as either “yes” or “no”.
As demonstrated above, an “all-that-apply” question with 4 possible responses is really 4 single-response questions.
Use radio buttons (circles) to identify response options to single-response questions. The set of possible responses should be mutually exclusive (i.e., the categories should not overlap). When indicated, make the set of response options collectively exhaustive by including an “other (specify)” response.
The visual analog scale (VAS) is another option for recording answers. It is important that the words that anchor each end describe the most extreme values for the item of interest. Here is a VAS for pain severity: