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	Diario di Ricerca Longitudinale	Metodo del diario	Indagine Longitudinale
Campo	Metodologia delle indagini	Metodologia delle indagini	Metodologia delle indagini
Famiglia	Process / pipeline	Process / pipeline	Process / pipeline
Anno di origine	1970s–1990s	1920s–1940s (systematised by Allport, 1942)	1940s (panel survey tradition); longitudinal designs codified mid-20th century
Ideatore	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)	Established tradition; formalized in social science by Paul Lazarsfeld and colleagues (1940s panel studies)
Tipo	Qualitative longitudinal data collection technique	Qualitative / mixed-methods data-collection technique	Quantitative / mixed-methods survey design
Fonte seminale	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	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922292
Alias	longitudinal reflexive journal, longitudinal researcher diary, longitudinal field diary, longitudinal research log	diary study, diary technique, self-report diary, daily diary method	panel survey, repeated-measures survey, longitudinal panel study, wave survey
Correlati	4	5	3
Sintesi	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.	A longitudinal survey collects structured questionnaire data from the same individuals or units at two or more distinct points in time. By tracking the same respondents across waves, researchers can distinguish genuine change from stable individual differences, establish temporal ordering between variables, and model trajectories of attitudes, behaviors, or outcomes in ways that a single cross-sectional snapshot cannot support.