Quiz

No, mainly because there's no standard GIFT format for all-or-nothing multiple choice and it's difficult to develop new GIFT formats that don't conflict with the existing question types.  It wouldn't be entirely impossible to add, but any GIFT format for all-or-nothing multiple would need to look very similar to normal multiple choice, which would probably lead to confusion.

The only currently supported import/export format is moodle XML.  If you have existing questions that you want to convert from multiple choice to all-or-nothing multiple choice, it would be pretty easy to convert a moodle XML export of the multiple choice questions to the all-or-nothing type with a simple search and replace.

Basically, make sure the right answers have grades of 100% and the wrong answers grades of 0% (which I think is the default if you've done a GIFT import, but I'm not sure).  Export the multiple choice questions in moodle XML format and in the moodle XML export, change all occurrences of

<question type="multichoice">

to

<question type="multichoiceset">

Import the modified file and all the modified questions should be added as all-or-nothing multichoice.  Normal multiple choice has a few more options than all-or-nothing, but I think the import will just ignore these options.  I also think that unpredictable things will happen if your grades aren't all either 100 or 0, because all-or-nothing doesn't know how to deal with any other grades.

Note that I haven't tried this out myself, so it may not be quite as straightforward as I've imagined...

That is the theory. However, the upgrade to Moodle 2.0 is big and scary, so you should definitely try out the upgrade on a copy of your site, before upgrading for real. See Upgrading, and Moodle migration for how to make a copy.

Hi Nicolas,

You are right, the contents of that 'multichoiceset_help' string is incorrect. Actually, in English, it should reflect the contents of the "old" Moodle 1.9 Help HTML file:

After an optional introduction, the respondent can choose one or more  answers.  If the chosen answers correspond exactly to the "Correct" choices defined in the question, the respondent gets 100%.  If he/she chooses any "Incorrect" choices or does not select all of the "Correct" choices, the grade is 0%.
The feedback specified for each choice is displayed next to any selected answers.
At least one choice must be marked correct for each question.  Add a "None of the above" option to handle a question where none of the other choices are correct.
This question type is unlike the multiple choice question with multiple answers because the choices do not have fractional grades.  The possible grades for a question are either 100% or 0%.

And the French translation could be copied from the "old" Moodle 1.9 Help HTML file (for which I did the French translation some time ago ; see this discussion in the French-speaking forum):

Dans ce type de question, l'étudiant peut choisir une ou plusieurs réponses. Si les choix effectués correspondent exactement aux réponses notées à 100% dans la question, il obtient un score de 100%. Si l'étudiant choisit l'une des réponses notées à 0% <em>ou</em> s'il ne choisit pas <em>toutes</em> les réponses notées à 100%", il obtient un score de 0%.
Le message de feedback correspondant à chaque choix s'affiche à droite de chaque réponse sélectionnée.
Dans ce type de question, une réponse au moins doit être avoir une note de 100%. Si aucune réponse n'est correcte, il faudra ajouter - comme réponse à 100% - une réponse intitulée par exemple "Aucune de ces réponses".
Le système de score pour cette question <em>Choix Multiple Tout-ou-rien</em> différe de celui des <em>questions à choix multiple et réponses multiples</em>, car le score <em>global</em> pour chaque réponse est soit 100% ("tout") soit 0% ("rien").

Joseph