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What was a "vassal"?
External Validity
The extent to which the results of a study can be generalized to other situations and to other people.
Internal Validity
The degree to which an experiment accurately shows that changes in the independent variable caused any observed changes in the dependent variable, minimizing confounding factors.
Demand Characteristics
Psychological experiment artifacts where participants form an interpretation of the study's purpose and unconsciously change their behavior to fit that interpretation.
Experimental Conditions
The controlled environments or set of procedures in scientific research designed to test hypotheses under standardized settings.
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