I set up my Typeform so that participants can fill in unlimted awnsers. This is a conscious choice.
If participants now fill in all the answers, the answer is always correct, because the correct answers are among the choices. This is of course not the intention. mostly there are one, two or three awsers right. How can you ensure that participants do not enter the correct answer when they click on all answers.
I'd love to hear from you!