This option allows you make it more difficult to identify respondents in your survey. Normally lots of information is collected, such as IP address, Geo location and referring page. Normally when using contacts, you can see exactly what each contact responded.
De-identification is the process used to prevent someone’s personal identity from being revealed. For example, contact information used during a survey might be de-identified to preserve privacy for participants. (Wiki)
There is a ‘De-identify survey’ option in CheckMarket which does the following:
- Disables the collection of IP addresses.
- Disables the collection of the referring page.
- Breaks the connection between contacts and their individual responses in the reporting.
If you are using contacts, you will still be able to track your contacts. You will be able to see which of them were invited, reminded, which of them bounced, opted-out, responded, etc. You will still be able to send automatic reminders. You will NOT be able to see their individual answers. In the respondent data, you will be able to see all the metadata in the custom fields that you imported, so make sure that you do not import personal identifiable information (PII) into these fields. If you still need certain meta-data in your reports (e.g. department, age category, level, …), create a hidden question to hold it and then pre-fill that question with the data from the correct custom field. If you want to de-identify the survey, make sure that the data from these hidden questions does not make individual respondents identifiable (for example, by applying filters in the report).
For additional information on de-identification in surveys, see this article from the U.S. Department of Health & Human Services.