Examlex
What is the purpose of criterion-referenced tests?
Observational Studies
Research methods in which subjects are observed in their natural environment without any intervention by the researcher.
Reactivity
The tendency of a person to alter their behavior or response due to the awareness of being observed or measured.
Directionality Problem
An issue that arises when it is unclear whether one variable causes changes in another or vice versa, complicating the interpretation of study results.
Random Sampling
Random sampling is a technique used in research to select a sample group from a larger population using random methods, ensuring that every individual has an equal chance of being chosen.
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