So sánh phương pháp

	Phương pháp Nhật ký	Khảo sát dọc
Lĩnh vực	Phương pháp luận khảo sát	Phương pháp luận khảo sát
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1920s–1940s (systematised by Allport, 1942)	1940s (panel survey tradition); longitudinal designs codified mid-20th century
Người khởi xướng	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)
Loại	Qualitative / mixed-methods data-collection technique	Quantitative / mixed-methods survey design
Công trình gốc	Alaszewski, A. (2006). Using Diaries for Social Research. Sage. ISBN: 978-0761941415	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922292
Tên gọi khác	diary study, diary technique, self-report diary, daily diary method	panel survey, repeated-measures survey, longitudinal panel study, wave survey
Liên quan	5	3
Tóm tắt	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.