I am preparing the questionnaire for my Doctor of Business Administration research; for the purposes of this question (on Academia SE), I am investigating techniques used in customising cars. It is conceivable that a respondent has used several techniques, so I envisage repeating the same questions, each time for a a different car or technique.
I imagine that the same repeating structure would be needed in a medical exam, where the respondent can give data about several complaints.
Is there a name for this technique? Does it have a canonical source?
I appreciate that this question might not be within the scope of this site.