“…key informant interviews are essentially qualitative interviews, and are carried out with interview guides that list topics and issues to be covered in a session. The interviewer frames the questions in the course of interviews and subtly probes the informants to elicit more information.”
References
Kumar, K., World Bank (Eds.), 1993. Rapid appraisal methods, World Bank regional and sectoral studies. World Bank, Washington, D.C. http://documents1.worldbank.org/curated/en/888741468740959563/pdf/multi0page.pdf