Setting up Qualtrics for a research study | XM Community
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We're currently setting up a randomised controlled study using Qualtrics , for which we're struggling on assigning a unique intervention or control link/code to a user at the end of the study. 

Flow: We want to ask questions, and at the end randomly assign users to either intervention or control group, and show them a unique code based on the assigned group.

Our struggles:

a) How do we randomise one of the two in a way that the user gets only one of the code displayed on the final screen and the email sent?

b) These unique links will be pre-loaded. How can we ensure that the same one does not get assigned to multiple users? Is there a way to track this or any kind of safeguard?

@kaushikb123,

I recommend using an external database and a web service to assign and track codes. You would include the group as a parameter to the web service.  The web service would return a code and update its status as assigned.

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