This document defines various research terminology used in media production including circulation, hits, box office figures, ratings, and sales. It also describes different types of research such as primary research, secondary research, quantitative research, qualitative research, audience research, market research, and production research. For each type of research, definitions, advantages, and disadvantages are provided along with examples. Terminology around objective vs subjective research and valid vs reliable research is also defined. Finally, examples of Harvard referencing style for research sources like films, articles, and websites are shown.