What is the difference between a longitudinal study and a cross-sectional study?
Longitudinal studies and cross-sectional studies are two different types of research design. In a cross-sectional study you collect data from a population at a specific point in time; in a longitudinal study you repeatedly collect data from the same sample over an extended period of time.
|Longitudinal study||Cross-sectional study|
|Repeated observations||Observations at a single point in time|
|Observes the same group multiple times||Observes different groups (a “cross-section”) in the population|
|Follows changes in participants over time||Provides snapshot of society at a given point|