Skipping of marking with crosses
Hello,
my problem with my experiment is the following: If the participants answer questions by making a cross, they can also skip a question without making a cross.
How is it possible to install, that participants can only go to the next question, if they already answered the question before with a cross?
Comments
Hi Mareike,
You should check out input validation: https://osdoc.cogsci.nl/3.2/manual/forms/validation/
Eduard