CATI is a computer assisted telephone access (Assisted Telephone Interview Computer) is the use of modern computer controlled communications equipment for random telephone access.During the telephone interview, the telephone number of the person being interviewed is required to be entered, and the computer is automatically dialed by the computer, and the telephone operator does not know the other side after the telephone is switched on.
Identity, is only responsible for the provision of access to the content of the dialogue. The access process and content can be recorded in real time to ensure that the authenticity of the content of the survey is reliable. Using this kind of interview investigation method, has the survey content objective reality, the secrecy is strong, the access efficiency high characteristic.

       CAPI​
       What is CAPI
       CAPI（Computer Assisted Personal Interviewing）Namely the computer aided interview, the basic principle of CATI is consistent with CATI, the difference is mainly in the form of its expression is rich, such as support photos, pictures, concept card graphics cards, sound issues play, audio and video files, etc.
       CAPI systems usually work in the form of
       Capi systems often work in the form of questionnaire by computer management and presentation, the interviewer can rely on a computer screen for a working visit, and respondents to answer directly input to the computer; if reluctant respondents through the interviewer answered also by the respondents directly answer input to the computer in order to protect the respondents of privacy. When access to the end or end of an interview, the interviewer directly through the Internet will be returned to the organizers of the questionnaire results, the organizers can receive the results of the investigation immediately after the analysis of the results.

       Intercept access is a very popular survey access method, which is usually used in the quantitative questionnaire survey, accounting for about 1/3 of the total personal access. The survey method is relatively simple, supermarket, office building, street, railway stations, parking and other public places can such access.
 

Generally, there are two forms in the access mode:         One is access to members of the pre selected number of locations, according to certain procedures and requirements (such as every few minutes to intercept a, or every few pedestrians intercept a) select access object, with the consent of the consent of the other party, at the scene according to a questionnaire of brief survey.       Another call center survey（Central Location Test） (or hall test (Hall test) is within a pre selected number of places, lease access to a private room or hall, according to the requirement of study may also put some respondents for viewing or trial products, in accordance with the procedures and requirements, blocking access to the object, with the consent of the to the special rooms and halls visited. Second methods are often used in the need to carry out physical display or special requirements of the exploratory research field control, or the need to test the causal relationship between research, such as advertising effectiveness testing, new market research, etc..

         According to the characteristics of different regions to carry out work, different regions have a person responsible for the site monitoring. Responsible for the supervision and review by the person responsible for the work of the joint inspection, irregular inspections, so that timely detection of problems in a timely manner. By the review of personnel responsible for the scene of the second screening work, ensure that respondents surveyed meet the conditions. According to the experience of the layout of the test room, to reduce the mutual interference between the visitors, to facilitate the collection of more information. The site audit is 100 per cent of the questionnaire, review correct only respondents left and send gifts, to facilitate the timely repair the problem to ensure the quality of the questionnaire.