手法を比較

	縦断的半構造化インタビュー	半構造化インタビュー
分野	調査方法論	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1990s–2000s (as explicit methodology)	1946 (Merton & Kendall); codified as a standard method through the 1980s–1990s
提唱者	Rooted in longitudinal qualitative research traditions; systematised by Johnny Saldana and Rachel Thomson & Janet Holland	Robert K. Merton and Patricia Kendall (focused interview, 1946); further systematised by Steinar Kvale
種類	Qualitative longitudinal data collection technique	Qualitative research method
原典	Saldana, J. (2003). Longitudinal Qualitative Research: Analyzing Change Through Time. AltaMira Press. ISBN: 978-0759100480	Kvale, S., & Brinkmann, S. (2009). InterViews: Learning the Craft of Qualitative Research Interviewing (2nd ed.). Sage. ISBN: 978-0761925422
別名	LSI, repeated semi-structured interview, panel qualitative interview, longitudinal qualitative interview	guided interview, semi-standardized interview, focused interview, SSI
関連	6	6
概要	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.	The semi-structured interview is a qualitative data-collection method in which the researcher prepares a set of key questions or topic areas in advance but remains free to probe, follow up, and reorder as the conversation evolves. Unlike structured interviews — which fix every question and sequence — or unstructured interviews — which are entirely open — the semi-structured format balances comparability across participants with the flexibility needed to capture the depth and nuance of individual perspectives. It is the most widely used interview format in social science, health, and education research.