CASI stands for Computer assisted self-interviewing, a computer-assisted survey technique in which the respondent completes the questionnaire on his or her own by entering answers into a computer provided by an employee of the research institution, and the answers are automatically recorded by a computer program that simultaneously controls the correct completion of the questionnaire. The interviewer’s role is to recruit the respondent and assist in operating the device used to fill out the questionnaire.
CASI survey is often used in social, medical and market research, as well as in scientific research involving a large number of respondents. CASI allows the automatic collection, processing and analysis of data, which increases efficiency and reduces the cost of research. At the same time, CASI allows for increased confidentiality of responses, as it allows for anonymous answering of questions on topics that may be controversial or intimate.