The most widely used method of data collection is the questionnaire.

Question

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The questionnaire is a very common and widely used data collection method in many fields such as social sciences, market research, healthcare, and more. It involves using a set of questions that are often standardized and administered to a target population through various means such as mail, email, online surveys, phone interviews, face-to-face interviews, and others. Though there are other methods of data collection like observation, experiments, interviews, focus groups, and secondary data analysis, questionnaires are still the most popular and versatile way of gathering information from a large group of people quickly and efficiently.

The Most Widely Used Method of Data Collection Is the Questionnaire