So sánh phương pháp

	Phương pháp Nhật ký	Phương pháp Nhật ký 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)	1942 (diary method); longitudinal variant formalised 1980s–2000s
Người khởi xướng	Gordon Allport (systematic social-science use); Nels Anderson (early fieldwork diaries)	Allport (1942); systematic longitudinal extension developed by Bolger, Davis & Rafaeli (2003)
Loại	Qualitative / mixed-methods data-collection technique	Longitudinal qualitative/quantitative data collection
Công trình gốc	Alaszewski, A. (2006). Using Diaries for Social Research. Sage. ISBN: 978-0761941415	Bolger, N., Davis, A., & Rafaeli, E. (2003). Diary methods: Capturing life as it is lived. Annual Review of Psychology, 54(1), 579–616.
Tên gọi khác	diary study, diary technique, self-report diary, daily diary method	diary study (longitudinal), daily diary method, repeated-measures diary, longitudinal self-report diary
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.	The Longitudinal Diary Method is a data collection technique in which participants record experiences, thoughts, feelings, or behaviors in structured diary entries repeatedly over an extended period — from days to months or even years. Unlike a one-shot survey, it tracks within-person change, daily fluctuation, and temporal processes in natural settings, making it especially powerful for studying how phenomena evolve over time.