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In preparation for a study of the effectiveness of an antipsychotic drug, an assistant puts all drugs into capsules of the same color and codes them. The assistant will have no part in administering the drug. Neither the subjects nor the experimenter will know who receives which drug. This is an example of a:
Minnesota Multiphasic Personality Inventory (MMPI)
A comprehensive psychological assessment tool that evaluates a wide range of personality traits and psychopathologies based on true/false questions.
Contrasted-Groups Method
A statistical method used in psychometrics to validate the effectiveness of a test by comparing the scores of groups with known differing characteristics.
Validity
The degree to which a test, tool, or study accurately measures or assesses what it is intended to.
Reliability
The degree to which an assessment tool produces stable and consistent results over time.
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