Market Research Services – What Is CATI Research And Its Advantages? CATI – Computer Assisted Telephone Interviewing is a type of study in which an interviewer reads the questionnaire on the computer screen before inputting the responses of the participants as they go. CATI research methodology is one of the most popular methods in market research for data collection. In simple words, CATI is the method of conducting proper research on the basis of an online questionnaire set up on the computer. The interviewer will generally ask the candidates to give their responses for it. Market research, is basically a telephonic interview based on an online questionnaire – for example, B2B market research or consumer research.