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| Longitudinell relationsundersökning× | Longitudinell forskning× | |
|---|---|---|
| Ämnesområde | Forskningsdesign | Forskningsdesign |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1960s–1980s (formalized in panel and longitudinal survey literature) | Late 19th–early 20th century; methodologically codified through the 20th century |
| Upphovsperson≠ | Classical survey methodology (Campbell & Stanley, 1963; Kessler & Greenberg, 1981) | No single originator; foundational methodological treatments by Stuart Menard and Judith Singer & John Willett |
| Typ≠ | Non-experimental quantitative design | Quantitative (or mixed) observational research design |
| Ursprungskälla≠ | Singer, J. D., & Willett, J. B. (2003). Applied Longitudinal Data Analysis: Modeling Change and Event Occurrence. Oxford University Press. ISBN: 978-0195152968 | Menard, S. (2002). Longitudinal Research (2nd ed.). Sage Publications. ISBN: 978-0761922841 |
| Alias | longitudinal correlational survey, prospective relational survey, repeated-measures relational survey, panel relational survey | longitudinal study, longitudinal design, prospective longitudinal study, repeated-measures observational study |
| Närliggande≠ | 3 | 4 |
| Sammanfattning≠ | A longitudinal relational survey follows the same sample at two or more time points, collecting structured questionnaire data each wave and examining how the relationships among variables change, strengthen, weaken, or emerge across time. Unlike a cross-sectional relational survey that offers a single snapshot, this design captures temporal dynamics and allows researchers to test whether earlier measurements predict later outcomes, making it valuable for studying development, attitude change, and causal ordering. | 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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