You're not assigning tokens to questions groups directly.dgiacometti wrote: What are the passages I have to do to in the platform to assign tokens to question groups?
You can uses tokens. Which means that you provide e.g. a invitation link to your respondents. This link includes a token. In Limesurvey you can add attributes to every token.
manual.limesurvey.org/Survey_participant...ned_attribute_fields
You e.g. add group as a attribute to your tokenlist. Next step would be to enter a value for this attribute for every token. So you will end up with 50% with group=1 and 50% with group=2
In Limesurvey you then can access this token attribute group via conditions. You then can display/hide a questiongroup depending on the value group=1 or group=2.
Sounds a bit complicated but once you got uses to tokens you will see that it is not that much work.
The main question to answer first is if you really able to contact every potential respondent and provide them a token/invitation link.
