Longitudinal Study
Definition
Research that involves repeated observations of the same variables over time.
Example
A researcher initiates a study to examine the development of social skills among a group of children. The study begins with a group of 5-year-olds, and the researcher administers a questionnaire to gather data on their social interactions and friendships. The same group is followed annually, and the same questionnaire is administered until they are 15 years old. This method enables the researcher to collect data over multiple years, allowing for the analysis of how social skills develop and change as the children grow older.
Why It Matters
Longitudinal studies are important because they let researchers see how things change over time. Instead of just getting a snapshot, like in a cross-sectional study, they track development, behavior, or trends as they unfold. This kind of research is especially valuable when studying growth, aging, learning, or anything that evolves.
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