手法を比較

	トライアンギュレーション型詳細インタビュー	詳細インタビュー
分野	調査方法論	質的手法
系統	Process / pipeline	Process / pipeline
提唱年	1978 (triangulation framework); in-depth interviewing ~1950s onward	Mid-20th century (formalised in qualitative social research from the 1950s onward)
提唱者	Norman K. Denzin (triangulation framework); in-depth interviewing practice is longstanding in qualitative research	Rooted in sociological interviewing traditions; systematised by researchers including Steinar Kvale and Herbert J. Rubin
種類	Qualitative data collection approach	Qualitative research method
原典	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.	Kvale, S. (1996). InterViews: An Introduction to Qualitative Research Interviewing. Sage. ISBN: 978-0803958203
別名	triangulated IDI, multi-source in-depth interview, triangulated qualitative interview, converging in-depth interview	IDI, semi-structured interview, unstructured interview, qualitative interview
関連	4	6
概要	Triangulated in-depth interviewing applies Denzin's triangulation logic to the in-depth interview method by deliberately combining multiple sources of convergent evidence — different informants, interviewers, time points, or corroborating data types — to strengthen confidence in qualitative findings. Rather than relying on a single interview account, the researcher gathers rich, open-ended accounts from several vantage points and cross-checks them for consistency and divergence, treating agreement as corroboration and disagreement as analytically meaningful.	The in-depth interview is a one-to-one qualitative data-collection method in which a researcher engages a participant in an extended, open-ended conversation to elicit rich, detailed accounts of experiences, perceptions, beliefs, or meanings. Unlike structured surveys, the interview guide serves as a flexible road map rather than a fixed script, allowing the researcher to probe unexpected directions as they emerge. The approach is foundational to qualitative inquiry and is used directly as a primary method or as the data-collection arm of phenomenology, grounded theory, narrative analysis, and other frameworks.