The most extensively researched and widely used personality test for screening and diagnosing psychiatric problems and disorders is the

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The Minnesota Multiphasic Personality Inventory (MMPI) is a well-established, widely used personality test that is common in clinical and forensic psychology settings. The test consists of hundreds of true/false questions that assess various personality traits and potential psychiatric issues, making it useful for screening and diagnosing a range of disorders. The Thematic Apperception Test (TAT) and Rorschach inkblot test are projective personality tests that are less widely used and less well-researched than the MMPI, and the California Psychological Inventory (CPI) is a personality test that is more focused on assessing normal personality functioning rather than diagnosing psychiatric disorders.

The Most Extensively Researched and Widely Used Personality Test for Screening