Computer-assisted telephone interviewing (CATI) is a telephone surveying technique in which the interviewer follows a script provided by a software application. It is a structured system of microdata collection by telephone that speeds up the collection and editing of microdata and also permits the interviewer to educate the respondents on the importance of timely and accurate data. The software is able to customize the flow of the questionnaire based on the answers provided, as well as information already known about the participant. It is used in B2B services and corporate sales.
CATI may function in the following manner:
Automated Computer Telephone Interviewing (ACTI) is a technique  by which a computer with speaker independent voice recognition capabilities asks respondents a series of questions, recognizes then stores the answers, and is able to follow scripted logic and branch intelligently according to the flow of the questionnaire based on the answers provided, as well as information known about the participant.
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