This document discusses different types of questions that can be used when gathering data through interviews or questionnaires. It describes direct vs indirect questions, specific vs nonspecific questions, questions of fact vs opinion, open-ended vs closed questions, and different response modes like fill-in, scaled, ranking, checklist and categorical. The document emphasizes matching question format and response mode to the variables being measured in the study and maintaining the relationship between items and defined study variables. It also briefly discusses random sampling and defining the target population.