Examlex
According to some scholars, passage of which amendment led to a substantial loss of influence of state governments in national policy-making?
Longitudinal
A research design in which the same subjects are observed or tested repeatedly over a period of time.
Correlational
Referring to a type of research design that examines the relationship between two or more variables to determine if they are associated in some way.
Longitudinal Research
A research design that involves repeated observations of the same variables over a period of time, extending from months to years.
Cross-Sectional
This observational study method examines data collected from a whole population or a selected portion of it at one specific time.
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