In cross-sectional research, a researcher compares multiple segments of the population at the same time
Sometimes, we want to see how people change over time, as in studies of human development and
lifespan. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time
In cohort studies, the participants must share a common factor or characteristic such as age, demographic, or occupation. A cohort study is a type of longitudinal study in which researchers monitor and observe a chosen population over an extended period
Triangulation means using more than one research method to improve the study’s validity
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