Present the respoonse modalities of a question at random

This function allows to avoid that the modalities, of a closed question, present first, may be chosen more frequently than the others. We avoid therefore « the anchor effect » and we eliminate a source of potential biais.

In the dialog box of the definition of the closed question, in the tab Controls, click on Random rotation except for, and precise possibly the modality (ies) that must/mustn't be submitted to this rotation.