Questionnaire A list of questions for study participants to answer as part of the study. How to say: Questionnaire Click image to enlarge USE IN A SENTENCE A questionnaire is one way researchers can collect data. MORE INFO A questionnaire could be used to find out if a person is eligible to take part in the study, or to measure if the intervention is working. A questionnaire could be online or on paper. WORDS RELATED TO QUESTIONNAIRE assessment data survey WORDS OPPOSITE TO QUESTIONNAIRE OTHER RESOURCES Data collection tools If you know of another resource that could help explain this term, please contact us!