The document discusses different methods for collecting data through interviews. It describes interview methods as a way to gather information from individuals to compare situations and analyze real-time data. Various types of interviews are outlined, including personal, telephonic, group, individual, and depth interviews. Advantages of interviews include obtaining more information, an ability to reorder questions, and potentially more honest answers through personal interaction. However, interviews also have disadvantages like being an expensive method, potential for interviewer or response bias, taking a long time, and requiring trained resources.
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