Hi,
I try to create something that will assign participants randomly to one of 4 groups, but I don't get it to work.

I work with LS 1.91, so I cannot add "question type equation". I have found some solutions, but I run into problems, so I think I make a mistake somewhere.

The following script I adjusted from another forum post (which can be found here www.limesurvey.org/en/forum/can-i-do-thi...-the-others?start=10)

<script type="text/javascript">
<!--
$(document).ready(function()
{
// Find a random number between 1 and 4
var randNumber = Math.floor(Math.random()*3 + 1);
$('input#answer96682X129523X1961293').val(randNumber);
checkconditions(randNumber,'96682X129523X1961293','text');
})
//-->
</script>

where 96682 is Survey ID, 129523 is Group ID, 1961293 is Question ID)

In the next question group I created 4 questions, and depending on the random "answer" participants would get one of the 4 questions (by adding the condition "answer to 'random' question equals 1" --> question 1; "...equals 2" --> question 2, etc.). This seems to work.

When I try to hide this question, however, it does no longer work (the question is hidden, but the questions following this question are not shown either).

Also, if I have 4 groups, is the "Math.floor(Math.random()*3 + 1)" correct, or should it be "Math.floor(Math.random()*4 + 1)" (as is shown in the link below). And are the random numbers obtained than 1 2 3 and 4 or 0 1 2 and 3? I have tested the above solution a number of times, but only got 1 2 or 3 as a response. Not sure if that is just coincidence, or that I actually only create those 3 numbers.

This is another solution that I found, but it did not work for me:
docs.limesurvey.org/tiki-index.php?page=...rol_survey_behaviour

I hope someone can help!
Many thanks in advance!

Hello,

With 2.0 (or 1.92), you can use directly:
{rand(1,4)} in an equation question type.

Denis

Thanks Denis,
Unfortunately, I work (via university server) with version 1.91, and don't have that option.
Any thoughts on how to solve this in 1.91?

Jolanda

You cannot hide the question with the advanced question setting, You need to hide it with JavaScript:or with CSS
To get a random number between 1 and 4, use

Thanks Tony!
I included the code for hiding the question in my javascript source, but it keeps showing the question...? Do you see the mistake in the code?

The source code that I have now is:

Thanks!
Jolanda.

Thinks it's $('#question96682').hide();

Yes! That works, great!!
It still shows the page of the question, but if I add this question to another group, people won't notice.

Thanks!

Oops, sorry, moving too fast...

I think it should be :
Or CSS:

(Assuming the question ID is 1961293)