How to prevent multiple responses from the same participant using their ID number?
Best answer by elbake
Hi everyone,
I recently ran into a similar problem and was able to solve it with the help of this thread and several Qualtrics product specialists. I think it’s most similar to
Context: I wanted to use the authenticator to prevent individuals with the same email address from retaking an anonymous link intake survey. In essence, I wanted to create a reverse authenticator.
Solution: I created an authenticator that asked for respondents’ email addresses. Since the authenticator skips past the authenticated section of the survey if the respondent fails to pass it, anyone who fails – that is, anyone whose email address is not in the contact list – will be allowed to take the rest of the survey (the sections in the non-authenticated section). And anyone who passes authentication – that is, anyone whose email address is already in the contact list -- is redirected to a block that says they've already taken the survey, at which point the survey ends.
The details:
This what the authenticator looks like. The ineligible_repeat block is a single text question that says: “It looks like you've already taken this survey. Unfortunately, you're not able to take the survey again.” If respondents pass the authenticator -- that is, if their email address is in the contact list -- they will be sent to this block.
If respondents fail the authenticator -- that is, if their email address isn’t in the contact list -- they will be skipped to the “demographic info pt. 1” block, and from there to the rest of the survey.
There are three very important authenticator “Options” that must be specified. If they are incorrect, the authenticator won’t work:
- Click on “Options” on the authenticator and ensure that “Maximum Authentication Attempts” is set to 1. If it is set to say 50, respondents will be prompted to try to authenticate 50 times before they “fail” to authenticate. We want respondents to either pass or fail on their first try so that they are immediately skipped to the authenticated or non-authenticated section (depending on whether or not they are in the contact list).
-
While in the “Options” section, scroll down and make sure that “Allow authenticating respondents to retake authenticated section” is checked. If it is not, Qualtrics will prevent anyone whose email address is already in the contact list from passing authentication (and therefore from moving on to the block that tells them they have already taken the survey). We want these respondents to be able to take -- and pass -- the authenticator so that they can move on to the block that tells them they are ineligible because they have already taken the survey.
-
Finally, in the “Options” settings, you will need to change the Authentication Prompt, Error, and Too Many Failures Error texts. My authentication prompt text says, “Please confirm your email address” and the the authentication error and too many failures texts say, “Please proceed to the next page of the survey.”
-
Here’s what the authentication prompt text looks like in the survey itself:
-
If the respondent fails the authenticator -- that is, if they’re not in the contact list, here’s the what authenticator error message looks like in the survey. Not ideal, but it’ll have to do. The next page will take them to the rest of the survey.
-
Feel free to tag me in a comment if you have questions, and I’ll do my best to explain.
!
!
I hope that would be supportive and helpful for the community 😊
Best Regards,
+1Hi Muqaibil
I'm just here to say thanks for your idea. It's very helpful!
But I also hope Qualtrics understand people can create the same ID (contents) over and over with contact list trigger, it is so annoying to remove duplicate ID one by one.
https://community.qualtrics.com/XMcommunity/discussion/comment/38836#Comment_38836Thanks a lot adafung and appreciate your comment...
In fact, if you would like to create your contact list based on contact list trigger, then you might need to have another survey and workaround for allowing only unregistered IDs to be updated to the contact list and then redirect them to the original survey which you use to collect responses through. They will be only authenticated against the contact list which was updated...
simply, its a registration form survey to create a contact list and authenticate another survey against that created contact list.. I hope its clear (although i dont think so :)
I think Qualtrics might think of having a better authentication system for the surveys and consider 2-step AUTH for all areas taking into account OTP approach for example as its always recommended security-wise...
Best Regards,
Muqaibil
+1Muqaibil Thank you very much for your detailed and clear explanation. It is very helpful and understandable. :) And yes, a separated registration form is a great idea if the participants need to go through multiple surveys later. I think I should do this for my project too.
Anyway, It is good to know they may have a better authentication system in the future. Hope it will be easier for everyone.
+2Hi everyone,
I recently ran into a similar problem and was able to solve it with the help of this thread and several Qualtrics product specialists. I think it’s most similar to
Context: I wanted to use the authenticator to prevent individuals with the same email address from retaking an anonymous link intake survey. In essence, I wanted to create a reverse authenticator.
Solution: I created an authenticator that asked for respondents’ email addresses. Since the authenticator skips past the authenticated section of the survey if the respondent fails to pass it, anyone who fails – that is, anyone whose email address is not in the contact list – will be allowed to take the rest of the survey (the sections in the non-authenticated section). And anyone who passes authentication – that is, anyone whose email address is already in the contact list -- is redirected to a block that says they've already taken the survey, at which point the survey ends.
The details:
This what the authenticator looks like. The ineligible_repeat block is a single text question that says: “It looks like you've already taken this survey. Unfortunately, you're not able to take the survey again.” If respondents pass the authenticator -- that is, if their email address is in the contact list -- they will be sent to this block.
If respondents fail the authenticator -- that is, if their email address isn’t in the contact list -- they will be skipped to the “demographic info pt. 1” block, and from there to the rest of the survey.
There are three very important authenticator “Options” that must be specified. If they are incorrect, the authenticator won’t work:
- Click on “Options” on the authenticator and ensure that “Maximum Authentication Attempts” is set to 1. If it is set to say 50, respondents will be prompted to try to authenticate 50 times before they “fail” to authenticate. We want respondents to either pass or fail on their first try so that they are immediately skipped to the authenticated or non-authenticated section (depending on whether or not they are in the contact list).
-
While in the “Options” section, scroll down and make sure that “Allow authenticating respondents to retake authenticated section” is checked. If it is not, Qualtrics will prevent anyone whose email address is already in the contact list from passing authentication (and therefore from moving on to the block that tells them they have already taken the survey). We want these respondents to be able to take -- and pass -- the authenticator so that they can move on to the block that tells them they are ineligible because they have already taken the survey.
-
Finally, in the “Options” settings, you will need to change the Authentication Prompt, Error, and Too Many Failures Error texts. My authentication prompt text says, “Please confirm your email address” and the the authentication error and too many failures texts say, “Please proceed to the next page of the survey.”
-
Here’s what the authentication prompt text looks like in the survey itself:
-
If the respondent fails the authenticator -- that is, if they’re not in the contact list, here’s the what authenticator error message looks like in the survey. Not ideal, but it’ll have to do. The next page will take them to the rest of the survey.
-
Feel free to tag me in a comment if you have questions, and I’ll do my best to explain.
+12Hi everyone,
I recently ran into a similar problem and was able to solve it with the help of this thread and several Qualtrics product specialists. I think it’s most similar to
Context: I wanted to use the authenticator to prevent individuals with the same email address from retaking an anonymous link intake survey. In essence, I wanted to create a reverse authenticator.
Solution: I created an authenticator that asked for respondents’ email addresses. Since the authenticator skips past the authenticated section of the survey if the respondent fails to pass it, anyone who fails – that is, anyone whose email address is not in the contact list – will be allowed to take the rest of the survey (the sections in the non-authenticated section). And anyone who passes authentication – that is, anyone whose email address is already in the contact list -- is redirected to a block that says they've already taken the survey, at which point the survey ends.
The details:
This what the authenticator looks like. The ineligible_repeat block is a single text question that says: “It looks like you've already taken this survey. Unfortunately, you're not able to take the survey again.” If respondents pass the authenticator -- that is, if their email address is in the contact list -- they will be sent to this block.
If respondents fail the authenticator -- that is, if their email address isn’t in the contact list -- they will be skipped to the “demographic info pt. 1” block, and from there to the rest of the survey.
There are three very important authenticator “Options” that must be specified. If they are incorrect, the authenticator won’t work:
- Click on “Options” on the authenticator and ensure that “Maximum Authentication Attempts” is set to 1. If it is set to say 50, respondents will be prompted to try to authenticate 50 times before they “fail” to authenticate. We want respondents to either pass or fail on their first try so that they are immediately skipped to the authenticated or non-authenticated section (depending on whether or not they are in the contact list).
-
While in the “Options” section, scroll down and make sure that “Allow authenticating respondents to retake authenticated section” is checked. If it is not, Qualtrics will prevent anyone whose email address is already in the contact list from passing authentication (and therefore from moving on to the block that tells them they have already taken the survey). We want these respondents to be able to take -- and pass -- the authenticator so that they can move on to the block that tells them they are ineligible because they have already taken the survey.
-
Finally, in the “Options” settings, you will need to change the Authentication Prompt, Error, and Too Many Failures Error texts. My authentication prompt text says, “Please confirm your email address” and the the authentication error and too many failures texts say, “Please proceed to the next page of the survey.”
-
Here’s what the authentication prompt text looks like in the survey itself:
-
If the respondent fails the authenticator -- that is, if they’re not in the contact list, here’s the what authenticator error message looks like in the survey. Not ideal, but it’ll have to do. The next page will take them to the rest of the survey.
-
Feel free to tag me in a comment if you have questions, and I’ll do my best to explain.
Hi
Hi everyone,
I recently ran into a similar problem and was able to solve it with the help of this thread and several Qualtrics product specialists. I think it’s most similar to
Context: I wanted to use the authenticator to prevent individuals with the same email address from retaking an anonymous link intake survey. In essence, I wanted to create a reverse authenticator.
Solution: I created an authenticator that asked for respondents’ email addresses. Since the authenticator skips past the authenticated section of the survey if the respondent fails to pass it, anyone who fails – that is, anyone whose email address is not in the contact list – will be allowed to take the rest of the survey (the sections in the non-authenticated section). And anyone who passes authentication – that is, anyone whose email address is already in the contact list -- is redirected to a block that says they've already taken the survey, at which point the survey ends.
The details:
This what the authenticator looks like. The ineligible_repeat block is a single text question that says: “It looks like you've already taken this survey. Unfortunately, you're not able to take the survey again.” If respondents pass the authenticator -- that is, if their email address is in the contact list -- they will be sent to this block.
If respondents fail the authenticator -- that is, if their email address isn’t in the contact list -- they will be skipped to the “demographic info pt. 1” block, and from there to the rest of the survey.
There are three very important authenticator “Options” that must be specified. If they are incorrect, the authenticator won’t work:
- Click on “Options” on the authenticator and ensure that “Maximum Authentication Attempts” is set to 1. If it is set to say 50, respondents will be prompted to try to authenticate 50 times before they “fail” to authenticate. We want respondents to either pass or fail on their first try so that they are immediately skipped to the authenticated or non-authenticated section (depending on whether or not they are in the contact list).
-
While in the “Options” section, scroll down and make sure that “Allow authenticating respondents to retake authenticated section” is checked. If it is not, Qualtrics will prevent anyone whose email address is already in the contact list from passing authentication (and therefore from moving on to the block that tells them they have already taken the survey). We want these respondents to be able to take -- and pass -- the authenticator so that they can move on to the block that tells them they are ineligible because they have already taken the survey.
-
Finally, in the “Options” settings, you will need to change the Authentication Prompt, Error, and Too Many Failures Error texts. My authentication prompt text says, “Please confirm your email address” and the the authentication error and too many failures texts say, “Please proceed to the next page of the survey.”
-
Here’s what the authentication prompt text looks like in the survey itself:
-
If the respondent fails the authenticator -- that is, if they’re not in the contact list, here’s the what authenticator error message looks like in the survey. Not ideal, but it’ll have to do. The next page will take them to the rest of the survey.
-
Feel free to tag me in a comment if you have questions, and I’ll do my best to explain.
Thank you so much for sharing this information! It is very useful to discover new ways to use the authenticator.
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