Audience measurement measures how many people are in an audience within a given market. Radio Audience measurement specifically relates to radio listenership.
A random probability sample is the "gold" standard of survey research.
Reconvened Group Discussion refers to groups that are conducted with the same set of respondents across 2 separate sessions.
A research design is the "blue print" of a study.
During a research project respondents can lose interest or be disinclined to continue.
Reach - also known as 'coverage'- is expressed as the percentage of an audience (households or individuals) with an opportunity to see a piece of content (programming, editorial or advertising) delivered by a medium.
Random Error is an error that affects measurements or potentially skews the data in an unpredictable way that cannot be recreated or controlled for.
Reputation is the sum total of perceptions about a company or other organisation.
Relevance is defined as 'the extent to which a product (or a brand) meets the consumer needs, functional and emotional'.
Repertoire refers to the range of different brands/products purchased and used by consumers for a pre-defined category.