The single most widely used self-report personality inventory in the world is the ______.

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The MMPI (Minnesota Multiphasic Personality Inventory) is the most widely used self-report personality inventory in the world, with over one million people taking the test every year. It is frequently used in clinical and forensic settings to assess mental health and diagnose psychological disorders. The other options, CPI (California Psychological Inventory), Meyers-Briggs, and SCII (Sixteen Personality Factor Questionnaire), are also well-known personality assessments but not as widely used as the MMPI.

The Single Most Widely Used Self-Report Personality Inventory in the World