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In social work research, effective data collection is critical to understanding social phenomena and developing interventions. Researchers use a variety of tools and techniques, chosen based on the research design, objectives, and type of data required—quantitative, qualitative, or mixed. These tools and techniques help ensure that the collected data is accurate, reliable, and relevant for analysis. One of the most commonly used tools is questionnaires, which are structured instruments consisting of a series of questions to gather standardized information from respondents. Questionnaires can be close-ended, providing fixed options for responses, or open-ended, allowing respondents to express opinions freely. They are especially useful _________ ________ _____ _______ ______ __________ _________ _______ ______ _____ _______.
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