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A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over long periods of time (i.e., uses longitudinal data). It is often a type of observational study, although it can also be structured as longitudinal randomized experiment. [1]
The National Longitudinal Survey of Children and Youth (NLSCY) is a project of Statistics Canada which engages in the long-term study of children. The NLSCY is implemented by Statistics Canada and Human Resources and Social Development Canada, and charged with identifying and charting longer-term trends in Canadian youth. The survey tracks the ...
A popular repeated-measures design is the crossover study. A crossover study is a longitudinal study in which subjects receive a sequence of different treatments (or exposures). While crossover studies can be observational studies, many important crossover studies are controlled experiments.
Panel data is a subset of longitudinal data where observations are for the same subjects each time. Time series and cross-sectional data can be thought of as special cases of panel data that are in one dimension only (one panel member or individual for the former, one time point for the latter). A literature search often involves time series ...
The longitudinal study data also showed that the achievement gap in reading between typical and dyslexic students occurs early – in first grade and persists. This finding impelled her to develop an evidence-based efficient screener to identify at risk beginning in kindergarten.
One application of multilevel modeling (MLM) is the analysis of repeated measures data. Multilevel modeling for repeated measures data is most often discussed in the context of modeling change over time (i.e. growth curve modeling for longitudinal designs); however, it may also be used for repeated measures data in which time is not a factor.
The Canadian Research Data Centre Network (CRDCN) is a network of quantitative social sciences which includes 27 facilities across Canada that provide "access to a vast array of social, economic, and health data, primarily gathered" by Statistics Canada and disseminate "research findings to the policy community and the Canadian public."
Cross-sectional study: involves data collection from a population, or a representative subset, at one specific point in time. Longitudinal study: correlational research study that involves repeated observations of the same variables over long periods of time. Cohort study and Panel study are particular forms of longitudinal study.
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