Pitkittäistarkastelut
Pitkittäistarkastelut, also known as longitudinal studies, are a type of observational research where data is gathered from the same subjects repeatedly over a period of time. This allows researchers to observe changes and developments within individuals or groups as they age or as their circumstances evolve. Unlike cross-sectional studies that compare different groups at a single point in time, pitkittäistarkastelut focus on the progression within a consistent cohort.
The primary advantage of pitkittäistarkastelut is their ability to establish temporal relationships between variables, which is
However, pitkittäistarkastelut are also resource-intensive, often requiring significant time and financial investment. Participant attrition, where individuals