Σύγκριση μεθόδων

	Σημειώσεις πεδίου	Διαχρονική Έρευνα
Πεδίο	Μεθοδολογία Επισκοπήσεων	Μεθοδολογία Επισκοπήσεων
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	Late 19th century (formalized in 20th century)	1940s (panel survey tradition); longitudinal designs codified mid-20th century
Δημιουργός	Rooted in 19th-century anthropology and sociology; systematized by ethnographers such as Bronislaw Malinowski and later Robert Emerson et al.	Established tradition; formalized in social science by Paul Lazarsfeld and colleagues (1940s panel studies)
Τύπος	Qualitative data collection and recording technique	Quantitative / mixed-methods survey design
Θεμελιώδης πηγή	Emerson, R. M., Fretz, R. I., & Shaw, L. L. (1995). Writing Ethnographic Fieldnotes. University of Chicago Press. ISBN: 978-0226206813	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922292
Εναλλακτικές ονομασίες	fieldnotes, observational notes, ethnographic notes, jottings	panel survey, repeated-measures survey, longitudinal panel study, wave survey
Συναφείς	6	3
Σύνοψη	Field notes are detailed written records created by researchers during or immediately after direct observation in a naturalistic setting. They capture what is seen, heard, and experienced — including behaviors, interactions, physical environments, and the researcher's own analytic impressions — forming the primary data source for ethnographic and observational studies.	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.