This document discusses key research terminology and methods. It defines terms like circulation, hits, box office figures, ratings, and sales that are used to measure various media. It also defines and provides examples of primary research methods like questionnaires, interviews, focus groups, and product analysis. Both quantitative and qualitative research approaches are explained. Quantitative research uses closed questions and quantitative data while qualitative research uses open questions and explores opinions, beliefs, and reasoning. The document also outlines advantages and disadvantages of primary and secondary research sources. It describes the purposes of audience, market, and production research and defines objective, subjective, valid, and reliable research.