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	マルチソース深層インタビュー
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1978 (triangulation framework); in-depth interviewing ~1950s onward	1980s–1990s (formalized in qualitative inquiry literature)
提唱者	Norman K. Denzin (triangulation framework); in-depth interviewing practice is longstanding in qualitative research	Grounded in qualitative traditions consolidated by Patton, Lincoln & Guba, and others
種類	Qualitative data collection approach	Qualitative data collection technique
原典	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.	Patton, M. Q. (2002). Qualitative Research and Evaluation Methods (3rd ed.). Sage Publications. ISBN: 978-0761919711
別名	triangulated IDI, multi-source in-depth interview, triangulated qualitative interview, converging in-depth interview	multi-informant in-depth interview, multi-perspective qualitative interview, multiple-source IDI, multi-stakeholder in-depth interview
関連	4	5
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 multi-source in-depth interview is a qualitative data collection strategy in which extended, open-ended interviews are conducted with participants drawn from two or more distinct source groups — such as providers and clients, managers and staff, or experts and laypeople. Collecting data across diverse informant positions enriches description and enables the researcher to examine a phenomenon from multiple vantage points within a single study.