Respondent is the person who is interviewed by a researcher.
Research Design is the framework for conducting a market research project that specifies how the information will be collected and analyzed to answer the questions at hand.
Research Brief: see Brief.
Representative Sample is a sample that contains units in the same proportion as the population of interest.
Refusal Rate is the percentage of contact people who decline to co-operate with the research study.
Recruiting is the inviting of selected participants (who meet specific eligibility criteria) to take part in a research project. The work is undertaken by a field recruiter (often just referred to as a recruiter).
Recommendations are suggested courses of action or an assessment of the relative strengths and weaknesses of particular courses of action.
Reach is the proportion of a specified television audience or universe who have been contacted by an advert at least once.
Raw Data refers to data before analysis or weighting.
Rating is a procedure used to evaluate a concept, product, advertisement, etc where respondents are asked to select one response from a scale to indicate the degree of their opinion.