Method evidence record
Longitudinal 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.
Evidence statusSources recorded, not reviewedBibliographic sources are present. Claim-level evidence review has not been performed.
Source record
Recorded
Citations copied verbatim from the method’s source record. No claim-level verification is inferred from them.
Longitudinal Research Design
Taxonomic method recordprocess-pipelineresearch-design
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
Open full method2 recorded citations, copied from the method source record.
Curated claims
Assessed
Claims persisted in the evidence ledger, each with its own assessment.
No curated claims yet
This view does not invent a claim assessment when the ledger has none.
Related methods
Suggested4
Generated from the method graph and shown as machine-suggested relations. No evidence claim is inferred.
- Taxonomic bucketDescriptive Research
machine-suggestedRelational suggestion, not evidence.
- Taxonomic bucketPanel Research
machine-suggestedRelational suggestion, not evidence.
- Taxonomic bucketSurvey Research
machine-suggestedRelational suggestion, not evidence.
- Taxonomic bucketTrend Research
machine-suggestedRelational suggestion, not evidence.