Examlex
Although nonexperiments resemble true experiments, they contain ____ and cannot ____.
Observer Effect
The phenomenon where the act of observing or measuring a system affects the system itself.
Observer Effect
The observer effect refers to changes that the act of observation can make on a phenomenon being observed.
Representative Sample
A subset of a population that accurately reflects the members of the entire population.
Volunteer Bias
The distortion of research results due to differences between those who choose to participate in studies and those who do not.
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