In my survey, I have 450 couples. In the Excel, the household head is denoted as "Bundle administrator", while the other one is denoted as "Bundle member". Only the former has an email account, since they share the same email account.
I plan to send the surveys for these 900 people.
I want to differentiate between the two members (the couple). How to do that?
Many thanks in advance!
Note that I cannot let individual leave/update the email in the survey. The team leader said, "on this survey, I think ANY hint that we might know who they are beyond the link of the survey to their email will jeopardize our confidentiality promise. If even one question can be linked to them, the fear may be we can look at all their information. We promise not to do that."
Question
How to identify the responses from couples who share the same email account?
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