This document defines and discusses various types of research used to study media products, including terminology, advantages, disadvantages, and examples. It covers primary and secondary research, quantitative and qualitative research, audience research, market research, production research, and objective versus subjective research. Key terms are defined, such as circulation, hits, box office figures, ratings, and sales. Different research methods like questionnaires, surveys, focus groups, and interviews are also outlined. Finally, the document provides an example of the Harvard referencing style.