手法を比較

	長期調査日記	ダイアリー法
分野	調査方法論	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1970s–1990s	1920s–1940s (systematised by Allport, 1942)
提唱者	Rooted in Zimmerman & Wieder's diary-interview method (1977); developed further in qualitative longitudinal research through the 1980s–1990s	Gordon Allport (systematic social-science use); Nels Anderson (early fieldwork diaries)
種類	Qualitative longitudinal data collection technique	Qualitative / mixed-methods data-collection technique
原典	Zimmerman, D. H., & Wieder, D. L. (1977). The diary: Diary-interview method. Urban Life, 5(4), 479–498.	Alaszewski, A. (2006). Using Diaries for Social Research. Sage. ISBN: 978-0761941415
別名	longitudinal reflexive journal, longitudinal researcher diary, longitudinal field diary, longitudinal research log	diary study, diary technique, self-report diary, daily diary method
関連	4	5
概要	A longitudinal research diary is a structured, ongoing record kept by the researcher throughout an extended study, capturing observations, decisions, emerging insights, and methodological reflections at repeated intervals over weeks, months, or years. It functions simultaneously as a reflexivity tool and a secondary data source, documenting how the inquiry evolves, how researcher positionality shifts, and how contextual changes influence the data collection process across time.	The diary method is a data-collection technique in which participants record their thoughts, behaviours, events, or experiences in their own words at regular or event-contingent intervals over a defined study period. By capturing data close in time to the event, diaries reduce retrospective recall bias and give researchers access to the texture of everyday life as it unfolds — something one-off surveys and retrospective interviews cannot provide.