The MMPI-2 is a widely used psychological assessment that was first published in 1943 and revised in 1989. It consists of 567 true/false questions and measures personality traits and psychopathology. The revision process involved updating outdated items and adding new scales. The MMPI-2 maintains good reliability and comparability to the original MMPI, while improving representation of special populations. Interpretation involves examining validity, clinical, content, and supplemental scale scores.