Hi, 

I am trying to implement a longitudinal study where participants will complete baseline survey with our research team. During baseline survey, participants will be given a unique code. 

Then, we will post Qualtrics anonymous link on our website so that participants can come back and complete them at the following time

• 3 months 
• 6 months 
• 9 months 
• 12 months.

We cannot do personal link since many of our participants will not have email address. 

I was able to link baseline and 3-month survey using Authenticator feature on Qualtrics. In short, participants can use their unique code as their login into 3 months survey. 

The challenge is that I only want to post one Qualtrics anonymous link on our website instead of one link for 3-month survey, one link for 6-month survey, and so on. This is mainly because I don’t think participants would know which link they should click on (In other words, I don’t think they would know which survey they should take).

This means, I want participants to login multiple times (at different times). And then this login page will decide which survey they should take base on their enrollment date. 

For example, if participant A enrolled on January 1st, 2024 and log in using the link on April 1st, 2024, then participant A would be prompted (branch to 3-month survey base on their enrollment date associated with their login and the date they access the link, in this case on April 1st) to take 3-month survey.

I want participant A to also come back to the website on July 1st, 2024 (we will figure out a way to notify participant A without emailing them), use the same link posted on our website, put the same login information, which will then automatically prompt (branch to 6-month survey) participant A to complete 6-month survey. 

The problem is that the login page is only available once…

Is there a way to override this? 

Or if there is another solution to what I am trying to implement, I am all ears! 

Thank you!