Curently the questionnaire displays a num=ber of questions according to what you, as the designer, decides: all in one, group by group or one by one.

We have come in a situation where people will use many different devices: large screens to small mobile screens.

Some designers use the help of scripts that find out what device/browser you are using and after that the software may behave differently.

I could think of the following two examples:

1. If people open a questionnaire on a big (define big) screen the questionnaire serves the questions group by group, but when a user opens the questionnaire on a small screen (mobile phone), the questionnaire serves the questions one by one.
2. On a big screen all questions are served, on a mobile screen, some questions are not shown. I specifically think about the ranking question, which is OK on a big screen, but becomes a mess on a small screen.

Any thoughts on this?

I don't think this is possible in Limesurvey, at least not without a major change in source code, because as you said, you define the display mode in the back end.

Personally I think the best way to show a questionnaire is usually question by question anyway.

One thing that could make sense is not showing certain questions due to the type of device (but then how do you analyze the survey, this is gonna be a mess in consistency). What might be a solution is to have a script, that reads the type of device and writes it into a hidden question. Based on this hidden question you can use conditions to hide certain questions.

holch is correct - you cannot manipulate a single survey this way.

I would use 2 (several?) surveys. The respondent could be sent to a remote PHP file that could detect user agent and redirect to the "mobile" or "desktop" survey.

What might be a solution is to have a script, that reads the type of device and writes it into a hidden question.

Yes! and there is an old related post about this here

Guys Actually I find the performance on the ranking question less than optimal even in laptops. It's to hard to drag and drop. You need to be too exact. I've used other drag and drops that are more... I 'm not sure if the term is responsive or less strict but are easier to use. Probably it's worth taking a look at how this option performs. Lime survey is the only survey platform I found with this Question type which is awsome. But the performance or trying to answer it can be a pain. Specially if you have several subquestions or answers like my survey.

Hi,

No solution for question By question / Group by group mode (but have some css/js to show one question with a group by group view)

For question condition : in the @todo list of git.framasoft.org/SondagePro-LimeSurvey-...erAgentInfo.php#L177