The document describes and compares several common research methods: interviews, questionnaires, focus groups, surveys, internet research, and library research. For each method, it outlines the type of data collected (qualitative vs. quantitative, primary vs. secondary), advantages, and disadvantages. Interviews provide in-depth qualitative data through direct conversation but are time-consuming. Questionnaires allow quick collection of answers from many people but responses lack detail. Focus groups generate discussion that yields additional qualitative details, but require compensation for participants. Surveys efficiently gather data from a large number of respondents but responses may not be accurate. Internet research is easy and up-to-date but data quality varies. Library research ensures accurate primary sources but is more time-