Instructions for participation


Scientific studies need to be conducted in a way that they follow certain quality standards. This only means that the persons participating should follow some instructions.


In order to make the present study as meaningful as possible, please follow the following instructions:


  • Please conduct the study without being disturbed (e.g., no telephone ringing, nobody talking to you, no traffic noise)
  • Answer spontaneously to each question - there are no "right" or "wrong" answers, we are interested in your personal opinion
  • Only participate one time per study (except for certain longtern/longitudinal studies)


If you have any open questions, do not hesitate to contact us here.