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Double-Blind Study
An experimental design in which neither the participants nor the researchers know who is receiving a particular treatment, to prevent bias.
Test-Retest Reliability
A measure of consistency where the same test is administered to the same group of people at two different points in time, and the scores are compared.
Experimenter Effects
Unintended changes in study participants’ behavior due to cues that the experimenter inadvertently conveys.
Representative Sample
A subset of a population that accurately reflects the members of the entire population.
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