The document describes and compares different research methods, including interviews, questionnaires, focus groups, surveys, internet research, and library research. It outlines the type of data each collects (qualitative vs. quantitative, primary vs. secondary) and notes advantages and disadvantages. Interviews gather clear, reliable qualitative and primary data directly from participants but may lack time and cause discomfort. Questionnaires efficiently gather primary data but questions must be detailed. Focus groups obtain qualitative and quantitative primary data from discussion but are expensive and time-consuming.