Differential Personality Inventory
The Differential Personality Inventory (DPI) is a self-report measure developed by Jackson and Messick (1964) for assessing several facets of psychopathology.
The DPI was designed in an attempt to overcome some of the limitations of the Minnesota Multiphasic Personality Inventory (MMPI), such as the lack of internal consistency of the scales, problems with response bias in terms of social desirability and acquiescence, and the inclusion of the same item in more than one scale. The DPI departs from the empirical tradition of the MMPI by adopting a rational approach in order to generate item pools, before following a sequential strategy similar to that used to elaborate the Personality Research Form (PRF). Tentative scales are first created on the basis of rationally generated item pools, and the scales are then refined after analysis of internal consistency results. In the final step of this sequential strategy, the preliminary scales are validated...