Yale attitude change approach
In social psychology, the Yale attitude change approach (also known as the Yale attitude change model) is the study of the conditions under which people are most likely to change their attitudes in response to persuasive messages. This approach to persuasive communications was first studied by Carl Hovland and his colleagues at Yale University during World War II. The basic model of this approach can be described as "who said what to whom": the source of the communication, the nature of the communication and the nature of the audience.
Source: Wikipedia — Yale attitude change approach (CC BY-SA 4.0)