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1. If a respondent needs to be screened out based on a specific answer, but still needs to see and answer the remaining questions, is the relevance equation logic used?
2. If a respondent should be screened out immediately after giving a specific answer and not continue the survey, the proper(simple) method is to use a Quota with a limit of 0 with the action Terminate survey?

3. How can a LimeSurvey administrator distinguish between respondents who completed the survey and those who were terminated / screened out?

• Is there a specific field, such as status, in the responses that indicates this?
• Or can this distinction only be made using the Redirect URL?
• If the survey does not use a redirect at the end, what options are available for the administrator to reliably identify respondents who completed the survey versus those who were terminated early?

4. Additionally:
Is an open-access survey (open survey) most often used for surveys?
Is a closed-access survey (token survey) most often used for screenings?

1. If a respondent needs to be screened out based on a specific answer, but still needs to see and answer the remaining questions, is the relevance equation logic used?

If the person needs to continue the survey, they are not a screen out. Could you explain a little bit more what you are referring to?

Or do you mean based on a response, they won't see specific questions? then yes, you use the relevance equation of that question to hide/show it based on previous answers.

2. If a respondent should be screened out immediately after giving a specific answer and not continue the survey, the proper(simple) method is to use a Quota with a limit of 0 with the action Terminate survey?

This sounds more like a screen out to me. Here you will use the zero quota, as you mentioned. If the screen out condition is based on various answers, you can create a hidden equation question and calculate there if the respondent is supposed to be screened out or not and ten set a zero quota on this question.

3. How can a LimeSurvey administrator distinguish between respondents who completed the survey and those who were terminated / screened out?
Is there a specific field, such as status, in the responses that indicates this?
Or can this distinction only be made using the Redirect URL?
If the survey does not use a redirect at the end, what options are available for the administrator to reliably identify respondents who completed the survey versus those who were terminated early?

Screened out people do not count as "completed". So you will see this in the data set. You can also see it via the "last page".

4. Additionally:
Is an open-access survey (open survey) most often used for surveys?
Is a closed-access survey (token survey) most often used for screenings?

Not sure what you mean with that. this has very little to do with survey vs. screenings (which is a survey as well, somehow).

Open surveys are usually used when you do not know your respondents / do not have their contact.

Closed surveys are used when you want to control who accesses your survey and if you you have a list of respondents to invite.

Thank you for your answer to point 2.
Am I correct in understanding that you are saying that a **quota with a limit of 0** can be set on a **hidden equation question**?

Thank you as well for your answer to point 4.
It is a simple and at the same time perfect explanation.

Previously, I had never used a zero quota and always relied only on **relevance equations + logic in a hidden equation question + logic in the End message**.

If I needed to screen someone out after a specific answer, the respondent simply would not see the subsequent questions and would receive the appropriate End message (for example):

In the hidden equation question (TerminatedAtTheEnd – this is the question name):

{if(
C.NAOK == 2
),

"terminated_type1",

if(
(S6 == 2 || S6a == 2)
),
"qualified",
"terminated_type2"
)
)}

And in Settings → Text elements → End message (for example):

{if(TerminatedAtTheEnd == "terminated_type1" ,
"Thank you for your willingness to participate. … . We value your opinions and look forward to getting your feedback in future studies.", "")}

{if(TerminatedAtTheEnd == "terminated_type2" ,
"There should be a standard message here if the survey is 'TERMINATED IMMEDIATELY'", "")}

{if(TerminatedAtTheEnd == "qualified" ,
"Thank you for your willingness to participate. You have qualified for this study! You will now be able to begin the survey.", "")}

In this example, the logic is that if the respondent gives an answer corresponding to “Terminate” or “Terminate Immediately”, they will immediately see the appropriate End message.

2. What is the correct / simpler way to design surveys with screening after a specific answer:

* **Relevance equation + hidden equation question + End message**,
or
* **Zero quota + hidden equation question**?

2. What is the correct / simpler way to design surveys with screening after a specific answer:

* **Relevance equation + hidden equation question + End message**,
or
* **Zero quota + hidden equation question**?

Of course the quota.
If you use relevance equations to "skip" the following questions this respondent is counted as "complete", not as "screenout"

Am I correct in understanding that you are saying that a **quota with a limit of 0** can be set on a **hidden equation question**?

Did you try?


And you'd better send the lss export of your survey.
Then we can show exactly what you need.

Thank you very much, I tested it and everything worked.