The researcher generally uses fixed-format items and reads the questions to the respondents. It allows better comparison of the responses across different individuals.
Unstructured Interview
Structured Interview
The researcher uses either free-format or semi-fixed-format
self-report measure. It provides in-depth information about the
particular concerns of an individual. However, the interviewers
need to be well trained so that they can collect certain information
through free conversation. It is also difficult to maintain objectivity.
Focus Group: Shared ideas both with interviewer and respondents.
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