Hi,
I'm currently block 1,500 participants who participated the previous similar study, using their participant's ID.
When I tried to use custom validation
e.g., "If [PID] is Not EQUAL to [their 1,500 PID]" then pass
However, to do that I need to copy and paste 1500 times
e.g., "If [PID] is Not EQUAL to [1st PID number]" AND "If [PID] is Not EQUAL to [2nd PID number]" AND ... AND "If [PID] is Not EQUAL to [1500th PID number]" .
Is there any possible way to do it easily?
Question
Multiple logics at once
+1
+22Put all the participant ID in a contact list external data reference and use authenticator in the survey flow. If they are authenticated then move them to end of survey with message, else continue with the survey.
+1rondev Thank you for your quick response. I tried to use Authenticator in the survey flow using contact list. However, I could move participants who already participated (those that I have their numbers) to end of the survey, but for new participants (those I don't have their numbers), they cannot pass the authenticator (as there is nothing that matched in the contact list). Do you know how to solve that problem?
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