I set a quota question with a limit of 0. The first question in the Survey ask if the participant wants to complete the Survey. Answering no will quit the Survey. If I set no welcome screen, the first page is the quota question. The participant can click refresh on this page and an empty response is saved in the database each time!!! I made an example here:
demo.limesurvey.org/index.php?r=survey/index&sid=823412&lang=en
If I display the welcome screen, then after clicking next the participant see the quota question. He can refresh the page and have an empty response saved but there is a warning from the browser (must resend information...).
The quota still works and the participant can fill the Survey or quit. However there are empty responses in the database that need to be deleted manually.
YvesLanglois wrote: The participant can click refresh on this page and an empty response is saved in the database each time!!! However there are empty responses in the database that need to be deleted manually.
You should use a quota exit with an autoload URL. That way no one is reentering the survey directly.
Since you don't want to conduct a survey on the demoserver, check that on your installation.
There are issues sometimes while testing surveys.
But you won't be able to prevent a entry in the responses database for every new visit. Even when the quota is on the first question.
