The Minnesota Multiphasic Personality Inventory (MMPI) is based on the contrasted- groups method of ascertaining validity.

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The MMPI uses the contrasted-groups method to gather validity, which involves comparing the test results of a group with a known diagnosis (e.g., individuals with a particular mental health disorder) to those of a control group without the same diagnosis. This method allows for the development of reliable and valid scales for measuring personality and psychopathology.

The Minnesota Multiphasic Personality Inventory (MMPI) Is Based on the Contrasted-