手法を比較

	ダイアリー法	エスノグラフィー	非参加観察
分野	調査方法論	質的手法	調査方法論
系統	Process / pipeline	Process / pipeline	Process / pipeline
提唱年	1920s–1940s (systematised by Allport, 1942)	c. 1922 (Malinowski's Argonauts of the Western Pacific)	Formalized mid-20th century (Gold 1958); practice dates to late 19th-century social surveys
提唱者	Gordon Allport (systematic social-science use); Nels Anderson (early fieldwork diaries)	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology	Raymond Gold (role typology); earlier roots in social survey movement and Chicago School sociology
種類	Qualitative / mixed-methods data-collection technique	Qualitative fieldwork tradition	Qualitative / quantitative observational data collection
原典	Alaszewski, A. (2006). Using Diaries for Social Research. Sage. ISBN: 978-0761941415	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462	Gold, R. L. (1958). Roles in sociological field observations. Social Forces, 36(3), 217–223.
別名	diary study, diary technique, self-report diary, daily diary method	Etnografi, participant observation, fieldwork, ethnographic research	detached observation, systematic observation, structured field observation, external observation
関連	5	5	5
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.	Ethnography is a qualitative research tradition in which a researcher immerses themselves in a social group or community over an extended period — typically three to six months or longer — to study its culture, values, and behaviours in their natural setting. Originating in social and cultural anthropology, and consolidated as a rigorous method by Bronisław Malinowski in the early twentieth century, ethnography produces rich, contextualised accounts of how people live, work, and make meaning together.	Non-participant observation is a data-collection method in which the researcher observes behavior, interactions, or events in a natural or structured setting without joining or influencing the activity under study. The observer maintains a deliberate distance from participants to minimize their own effect on the phenomena being recorded, producing field notes, behavioral tallies, or recordings that reflect naturally occurring behavior rather than behavior shaped by researcher involvement.