A GUI for this is a way off yet (from me at least).
The structure is defined in the tables (surveys are a list of question IDs, and questions can consist of a list of subquestions) but notice that the words in the tables refer to strings in the lang files (eg lang/en/survey.php)
You could also consider using a journal activity, or even a forum where you ask them to comment publically and discuss certain aspects.
General developer forum
Creating Surveys
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