手法を比較

	ダイアリー法	参与観察
分野	調査方法論	質的研究
系統	Process / pipeline	Process / pipeline
提唱年	1920s–1940s (systematised by Allport, 1942)	1922
提唱者	Gordon Allport (systematic social-science use); Nels Anderson (early fieldwork diaries)	Bronislaw Malinowski
種類	Qualitative / mixed-methods data-collection technique	Method
原典	Alaszewski, A. (2006). Using Diaries for Social Research. Sage. ISBN: 978-0761941415	Geertz, C. (1973). The Interpretation of Cultures. Basic Books. ISBN: 978-0465026432
別名	diary study, diary technique, self-report diary, daily diary method	ethnographic observation, participatory observation, overt observation, immersive observation
関連	5	4
概要	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.	Participant observation is a qualitative research method in which the researcher embeds themselves within a community, organization, or social setting for an extended period, engaging in the activities and relationships of the group while systematically observing and documenting behavior, interactions, and cultural meaning. Pioneered by Malinowski in the 1920s and developed in anthropology, the method has been adopted across sociology, education, health sciences, and organizational research. The researcher functions as both insider (participating in group activities) and outsider (maintaining analytical distance), generating thick description—rich accounts of context, behavior, and meaning that reveal how people actually live and interact.