In addition to the substantive responses we also offer default missing values: invalid, refused and don't know. In the second and third case missing values will be shown only if the respondent will not answer the question.
Question is not mandatory.
Question is set as mandatory (hard reminder).
Option is turned on: Show the option "Invalid"/"Refused"/"Don't know" on alert
Question is set as mandatory (soft reminder).
Univerza v Ljubljani
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