I had a study which asked participants to listened to a list of songs, interacted with the system and fill in a post-task survey. However, there were some participants who did not follow the instructions: they did not listen to the songs at all (as we track particants’ behaviors when using the system), but they still fill in the post-task survey. Apparently, they did not follow the instructions and their data is useless to us. In this case, can I reject their repsonses?
Thanks for your help.