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To make the survey available to a selected group of people, enable authentication through one of these ways:
- Password: a fixed password all users must enter to respond to the survey.
- Password assigned by invitations: requires invitees to be added to the survey. When invitees are added, a unique id and a key (password) will be generated for each. The link sent by email by the invitation feature will include the id and key in the link. If these are not included, the respondent will be asked to enter these values. For more information on invitations, see invitations
- Off: No password is required to enter the survey. Use this mode if the survey is open to the general public.
Depending on the survey, it may be required that the responses must be kept anonymous. The anonymity only applies if the invitation feature is used in the survey. This is because the invitation being send is linked to the responses. This is necessary to enable tracking of invitees (whether they have responded to the survey or not). Also the IP check for multiple responses should be disabled to improve anonymity.
Opinio allows three levels of anonymity:
- No anonymity. Invitees are completely linked to the respondents.
- Partly anonymous. This means that the link between invitees and respondents are not shown on the screen, but is kept on the database level. Then the reminder feature will still work (it is dependent on a link between respondent and invitee, to check if an invitee has responded to the survey).
- Full anonymity. The link between the invitee is completely removed both on the screen and on the database level.
Note that the anonymity will only be set for the respondents answering a survey after the feature is turned on. To keep full anonymity for all respondents, this feature must be turned on before the survey is started.