The document discusses different types of questionnaires used in research. It defines a questionnaire as a set of predetermined questions used to collect factual information in surveys. There are four main types of questionnaires: open-ended, close-ended, combination, and pictorial. Open-ended questions allow respondents to freely express views, close-ended restrict answers to stated options like yes/no, and combination uses both open and closed questions. Pictorial questionnaires rarely include pictures. The rest of the document contains an example emergency department questionnaire with closed questions on wait times and patient experience.