विधियों की तुलना करें

	अनुदैर्ध्य सहसंबंधी अनुसंधान	पैनल अनुसंधान
क्षेत्र	अनुसंधान अभिकल्प	अनुसंधान अभिकल्प
परिवार	Process / pipeline	Process / pipeline
उद्भव वर्ष	Mid-20th century (formalized 1940s–1960s)	1970s-1980s (econometric formalization); earlier social survey use from 1940s
प्रवर्तक	Rooted in early correlational methodology (Galton, Pearson late 19th c.); longitudinal extension formalized through panel studies in social sciences (mid-20th c.)	Social science and econometric traditions; systematized by Cheng Hsiao and others from the 1970s-1980s
प्रकार	Non-experimental quantitative design	Quantitative longitudinal observational design
मौलिक स्रोत	Fraenkel, J. R., Wallen, N. E., & Hyun, H. H. (2009). How to Design and Evaluate Research in Education (8th ed.). McGraw-Hill. ISBN: 978-0078097898	Hsiao, C. (2003). Analysis of Panel Data (2nd ed.). Cambridge University Press. ISBN: 978-0521522717
उपनाम	longitudinal correlational study, prospective correlational design, longitudinal associational research, repeated-measures correlational design	panel study, panel survey, longitudinal panel, repeated-measures panel
संबंधित	3	3
सारांश	Longitudinal correlational research is a non-experimental quantitative design that examines the strength and direction of relationships among variables by collecting data from the same participants at two or more points in time. Unlike a cross-sectional correlational study, the longitudinal approach captures how associations evolve, persist, or dissolve across time, providing a stronger empirical basis for causal inference without experimental manipulation.	Panel research is a quantitative longitudinal design in which the same individuals, organizations, or other units are measured repeatedly across two or more time points. Unlike cross-sectional surveys that capture a single snapshot, a panel tracks change within units, enabling researchers to separate genuine within-unit change from between-unit differences and to model causal dynamics over time.