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Longitudinal Research — Longitudinal Research Design
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.
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Sources
- Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922841
- Singer, J. D., & Willett, J. B. (2003). Applied Longitudinal Data Analysis: Modeling Change and Event Occurrence. Oxford University Press. ISBN: 978-0195152968
Related methods
Referenced by
Bayesian Cohort ResearchBayesian Panel ResearchCausal-Comparative ResearchComparative Cross-Sectional ResearchComparative Longitudinal ResearchComparative Panel ResearchComparative Trend ResearchCross-sectional Descriptive ResearchDescriptive ResearchEx Post Facto DesignLongitudinal Causal-Comparative ResearchLongitudinal Cohort ResearchLongitudinal Confirmatory ResearchLongitudinal Correlational ResearchLongitudinal Ex Post Facto DesignLongitudinal Explanatory ResearchLongitudinal Historical Archival ResearchLongitudinal Hypothesis Testing ResearchLongitudinal Model Testing ResearchLongitudinal Program EvaluationLongitudinal Quantitative Content AnalysisLongitudinal relational surveyLongitudinal Survey ResearchModel Testing ResearchMultivariate Cohort ResearchMultivariate Cross-Sectional ResearchMultivariate Longitudinal ResearchMultivariate Panel ResearchPanel ResearchPanel-based Causal-Comparative ResearchPanel-based Cohort ResearchPanel-based Confirmatory ResearchPanel-based cross-sectional researchPanel-based Descriptive ResearchPanel-based Model Testing ResearchPanel-based quantitative content analysisPanel-based Relational SurveyPanel-based survey researchSimulation-Assisted Trend ResearchSurvey ResearchTrend Research