Hi Franck,
I'm not sure I understand what you really want to achieve with this. When you mention "3 periods", do you mean that the same respondents would answer the same questionnaire at 3 different ages of their own life? (not very likely) or... what else.
Please provide more details, with real-life examples if possible.
Joseph
New URL for my Quiz to test the Random answers select question type here:
https://www.rezeau.org/moodle/mod/quiz/view.php?id=78
This new Quiz illustrates a new option for displaying correct answers after checking. You can display the correct answers :
separated by commas (this is the default option)
separated by spaces (which may allow a whole sentence to be displayed on the same line without extra commas)
separated by line breaks (useful for long answers)
For potential testers, I have put a new version on my github.
Unfortunately, as I have added the new option mentioned above in the edit form (and thus a new field in the database), to see this option, you will need on your moodle test site to first delete all the questions you had already created, AND uninstall the Random select answers question type in the admin panel BEFORE reinstalling the new version.
Normally, database changes should be automated, but I didn't see fit to do that for an alpha/beta version. I'm getting lazy.