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when we want to add a questionnaire we can not choose the options 'multiple choice' and 'open question'. we are using the OpenSesame for OS. Can somebody help us?
Welcome to the forum!
The multiple_choice and open_question plug-ins are from the questionnaire plug-in pack, and need to be installed separately (for most distributions of OpenSesame), as described here:
However, unless you have a specific reason for using these plug-ins, you are probably better of with using forms, which are newer and much more flexible. See here:
Hope this helps.