Σύγκριση μεθόδων

	Έρευνα με Δείγμα Πάνελ	Έρευνα Επιμήκους Τροχιάς
Πεδίο	Ερευνητικός Σχεδιασμός	Ερευνητικός Σχεδιασμός
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	Mid-20th century; formalized as a distinct design by the 1940s–1960s in sociological and economic research	Late 19th–early 20th century; methodologically codified through the 20th century
Δημιουργός	Established through social science survey methodology; foundational reference: Kasprzyk et al. (1989)	No single originator; foundational methodological treatments by Stuart Menard and Judith Singer & John Willett
Τύπος	Quantitative longitudinal observational design	Quantitative (or mixed) observational research design
Θεμελιώδης πηγή	Kasprzyk, D., Duncan, G., Kalton, G., & Singh, M. P. (Eds.). (1989). Panel Surveys. Wiley. ISBN: 978-0471617143	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922841
Εναλλακτικές ονομασίες	panel survey, longitudinal survey panel, repeated survey design, panel data survey	longitudinal study, longitudinal design, prospective longitudinal study, repeated-measures observational study
Συναφείς	5	4
Σύνοψη	Panel-based survey research is a quantitative longitudinal design in which the same set of respondents — the panel — is surveyed with structured questionnaires at two or more distinct time points. By tracking the same individuals over time, the design captures intra-individual change, documents how outcomes evolve, and enables stronger causal inference than a single cross-sectional survey can provide. It is widely used in social science, economics, public health, and education research.	Longitudinal research is an observational design in which the same participants, groups, or units are measured repeatedly over an extended period. Rather than capturing a single snapshot, it tracks change, stability, and temporal sequencing of variables — making it the primary non-experimental strategy for studying development, growth, decline, and the unfolding of causal processes across time.