Questions | Response optionsb | ||
---|---|---|---|
Close-ended | Partly open-ended | Open-ended | |
Structured | type 1 - written questionnaire - face-to-face interview - telephone interview | type 2 (as type 1) | type 3 (as type 1) |
Semi-structured | type 4 - telephone interview | type 5 - problem-centered interview | type 6 - expert interview - focused interview |
Unstructured | type 7 | type 8 | type 9 - narrative interview - in-depth interview |