So sánh phương pháp

	Phỏng vấn bán cấu trúc đa nguồn	Phỏng vấn bán cấu trúc theo chiều dọc
Lĩnh vực	Phương pháp luận khảo sát	Phương pháp luận khảo sát
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1980s–2000s (multi-source data strategies in qualitative inquiry)	1990s–2000s (as explicit methodology)
Người khởi xướng	Established practice in qualitative and mixed-methods research; systematized by Patton (2002) and Bryman (2016)	Rooted in longitudinal qualitative research traditions; systematised by Johnny Saldana and Rachel Thomson & Janet Holland
Loại	Qualitative data collection technique	Qualitative longitudinal data collection technique
Công trình gốc	Bryman, A. (2016). Social Research Methods (5th ed.). Oxford University Press. ISBN: 978-0198745754	Saldana, J. (2003). Longitudinal Qualitative Research: Analyzing Change Through Time. AltaMira Press. ISBN: 978-0759100480
Tên gọi khác	multi-informant semi-structured interview, multi-perspective semi-structured interview, multi-source qualitative interview, triangulated semi-structured interview	LSI, repeated semi-structured interview, panel qualitative interview, longitudinal qualitative interview
Liên quan	5	6
Tóm tắt	A multi-source semi-structured interview strategy collects qualitative data via guided, open-ended interviews from two or more distinct groups or perspectives relevant to the same phenomenon. By deliberately querying multiple vantage points — such as managers and employees, patients and clinicians, or teachers and students — the researcher can compare, contrast, and triangulate accounts, producing a richer and more balanced picture than any single-source approach allows.	A longitudinal semi-structured interview study collects open-ended, guided interview data from the same participants across multiple time points. By returning to the same individuals — weeks, months, or years apart — researchers can trace how experiences, perceptions, and meanings change over time. The approach blends the flexibility of qualitative inquiry with the temporal depth that is impossible in a one-shot design, making it a cornerstone method in qualitative longitudinal research.