เปรียบเทียบวิธี

	การวิจัยกรณีศึกษา	ระเบียบวิธีบันทึกประจำวัน
สาขาวิชา	เชิงคุณภาพ	ระเบียบวิธีสำรวจ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1984 (seminal codification)	1920s–1940s (systematised by Allport, 1942)
ผู้ริเริ่ม	Robert K. Yin (systematised in Case Study Research, 1984)	Gordon Allport (systematic social-science use); Nels Anderson (early fieldwork diaries)
ประเภท	Qualitative research design	Qualitative / mixed-methods data-collection technique
แหล่งต้นตำรับ	Yin, R.K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Alaszewski, A. (2006). Using Diaries for Social Research. Sage. ISBN: 978-0761941415
ชื่อเรียกอื่น	Vaka Çalışması (Case Study), case study design, case study methodology	diary study, diary technique, self-report diary, daily diary method
ที่เกี่ยวข้อง	5	5
สรุป	Case study research is a qualitative research design that investigates a specific phenomenon, individual, group, organisation, or event in depth within its real-world context. Systematised by Robert K. Yin in 1984, it supports single-case and multiple-case designs and draws on multiple data sources — interviews, observation, documents, and artefacts — to build a rich, contextualised account of a bounded unit.	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.