Qualtrics Survey Xblock

  Author fields in Studio:
   - Display Name
   - Survey ID
   - Your University
   - Link Text
   - Parameter Name for UserID

  If Parameter Name is left blank, the anonymous student id is
  omitted from the url.

  Links to an already existing Qualtrics survey.
@stvstnfrd Why shouldn't it be parameterizable?  Instructors don't have a choice about the part of the URL that's the parameter for the survey_id (so it's hard-coded), but they _do_ have a choice about what the parameter that takes the user_id is called - some might like to use a parameter that doesn't make clear that it's a user_id (e.g. "a") whereas some might like to use a parameter that does make it clear (e.g. "user").  Our instructors have created surveys that use different values for this, even though our default has "a", so my presumption is that we may as well allow them to continue to set it to be something other than "a" if that's what they prefer. (At any rate, I see no reason not to.)