手法を比較

	複数ソース半構造化インタビュー	縦断的半構造化インタビュー
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1980s–2000s (multi-source data strategies in qualitative inquiry)	1990s–2000s (as explicit methodology)
提唱者	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
種類	Qualitative data collection technique	Qualitative longitudinal data collection technique
原典	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
別名	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
関連	5	6
概要	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.