Which method involves interviewers stationed at specific sites to question individuals?

The method involving interviewers stationed at specific sites to question individuals is known as an intercept survey. This approach allows researchers to engage directly with respondents in real-time, capturing immediate feedback or opinions. Intercept surveys are typically conducted in high-traffic areas such as shopping malls, events, or public spaces where potential participants can be approached on the spot. This technique capitalizes on the opportunity to gather data from individuals who are already in particular environments relevant to the subject matter, enhancing the relevance and context of the feedback gathered.

In contrast, online surveys are typically distributed through digital platforms, reaching respondents via the internet rather than in person. Focus groups involve guided discussions with a small group of people, providing qualitative insights but not necessarily employing the site-specific approach of intercept surveys. In-depth interviews are one-on-one discussions intended to explore a participant's experiences or opinions in detail, but they do not take place in a public setting with multiple respondents being interviewed simultaneously. Each of these methods serves unique purposes, but intercept surveys specifically aim for spontaneous and direct interactions in defined locations.