Stimuli Needed to Elicit the Response Frequently, researchers need to expose respondents to some type of stimulus in order to elicit a response. Common examples of stimuli are products (as in taste tests) and promotional visuals (as in advertising research). An interviewer is often needed in situations where respondents must touch or taste something. The Internet and personal surveys can be used whenever visual stimuli are required in the research.
The actual form of the personal interview may vary. It is not always necessary to design a one-on-one interview. For example, people may come in groups to a central location for taste testing, or people in mall-intercepts can be shown video to obtain their opinions on advertising.