手法を比較

	電話を用いた詳細面接	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	1980s–1990s (widespread adoption)	1946 (Merton & Kendall); codified as a standard method through the 1980s–1990s
提唱者	Developed from qualitative interview traditions; telephone variant documented from the 1980s onward	Robert K. Merton and Patricia Kendall (focused interview, 1946); further systematised by Steinar Kvale
種類	Qualitative data collection technique	Qualitative research method
原典	Sturges, J. E., & Hanrahan, K. J. (2004). Comparing telephone and face-to-face qualitative interviewing: A research note. Qualitative Research, 4(1), 107–118.	Kvale, S., & Brinkmann, S. (2009). InterViews: Learning the Craft of Qualitative Research Interviewing (2nd ed.). Sage. ISBN: 978-0761925422
別名	telephone in-depth interview, phone-based qualitative interview, TIDI, telephone qualitative interview	guided interview, semi-standardized interview, focused interview, SSI
関連	3	6
概要	A telephone-assisted in-depth interview is a qualitative data collection method in which a researcher conducts a lengthy, open-ended, exploratory conversation with a participant via telephone. It preserves the depth and flexibility of face-to-face in-depth interviewing while overcoming geographic and mobility barriers, making it particularly useful when participants are dispersed, housebound, or when travel is impractical.	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.