مقایسهٔ روش‌ها

	پژوهش همبستگی طولی	طراحی پژوهش طولی
حوزه	طراحی پژوهش	طراحی پژوهش
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	Mid-20th century (formalized 1940s–1960s)	Late 19th–early 20th century; methodologically codified through the 20th century
پدیدآور	Rooted in early correlational methodology (Galton, Pearson late 19th c.); longitudinal extension formalized through panel studies in social sciences (mid-20th c.)	No single originator; foundational methodological treatments by Stuart Menard and Judith Singer & John Willett
نوع	Non-experimental quantitative design	Quantitative (or mixed) observational research design
منبع بنیادین	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	Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922841
نام‌های دیگر	longitudinal correlational study, prospective correlational design, longitudinal associational research, repeated-measures correlational design	longitudinal study, longitudinal design, prospective longitudinal study, repeated-measures observational study
مرتبط	3	4
خلاصه	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.	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.