Computer Aided Self-Interview (CASI)

A computer aided self-interview is a research method that involves the respondent using a computer to answer a survey without there being an interviewer or respondent asking the questions or taking note of the answers. They are often used when the researcher is trying to ascertain sensitive information about someone as to ensure they are answering in an entirely confidential way. Usually performed at the respondent’s home, computer aided self-interviews are easily accessible to anyone as long as they have a computer.

There are two types of computer aided self-interview: audio and video. A video CASI is most commonly used; however, does require the participant to have a good level of eye-sight and to be able to read well. An audio CASI, on the other hand, allows people with limited or no vision to still participate in a research study.

Computer aided self-interviews are often performed using software on a website allowing for, potentially, a worldwide audience and a greater amount of people to be able to access the survey. They are also relatively inexpensive because no researcher will need to be present. However, CASI surveys are targeting just people who own computers, possibly allowing bias into the study. Furthermore, they could also cause confusion for the respondent as a question may be open to interpretation. With no interviewer present, the respondent could answer the question incorrectly and it may be a biased answer.

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