| Category | Details |
|---|---|
| Description | The Differential Personality Inventory–Form L (DPI; Jackson & Messick, 1962) is an inventory designed to measure personality traits indicative of psychopathology. This 300-item tool contains 15 scales: 12 assess aspects of psychopathology, including Cynicism (e.g., “Most people are crooked.”), Depression (e.g., “I always feel insignificant.”), Familial Discord (e.g., “Some members of my family make my blood boil.”), Health Concern, Hostility, Impulsivity, Irritability, Neurotic Disorganization, Psychotic Tendencies, Rebelliousness, Socially Deviant Attitudes, and Somatic Complaints. The remaining 3 scales measure validity: Defensiveness, Desirability, and Infrequency. The DPI was constructed using a sequential strategy to ensure scale homogeneity and minimize response bias. It has shown internal consistency, convergent validity, and discriminant validity (Jackson & Carlson, 1969). |
| Author | Jackson, Douglas N.; Messick, Samuel |
| Purpose | To measure personality traits indicative of psychopathology. |
| Construct | Psychopathology |
| Instrument Type | Inventory/Questionnaire |
| Administration Method | Paper |
| Test Year | 1962 |
| Format | The Differential Personality Inventory–Form L contains 300 items. |
| Test Items Available | No |
| Reliability | No reliability indicated |
| Validity | The DPI was assessed through a two-group discriminant analysis, comparing university students and inmates. Significant differences (p < .001) were found on 7 of the 12 content scales, indicating that the groups responded differently. |
| Factor Analysis | No factor analysis indicated |
| Classification | Physical Health/Illness Related Assessment |
| Age Group | Adulthood (18 years and older) |
| Population Details | Sample: University students and reformatory inmates, United States |
| Keywords | Differential Personality Inventory–Form L; Validity |
| Index Terms | Personality Measures; Test Forms; Test Validity |
| Reference | Carlson, K. A. (1972). Classes of adult offenders: A multivariate approach. Journal of Abnormal Psychology, 79(1), 84–93. https://doi.org/10.1037/h0032338 |
Cite this article
Mohammed looti (2026). Differential Personality Inventory–Form L (DPI). PSYCHOLOGICAL SCALES. Retrieved from https://scales.arabpsychology.com/s/differential-personality-inventory-form-l-dpi/
Mohammed looti. "Differential Personality Inventory–Form L (DPI)." PSYCHOLOGICAL SCALES, 4 Apr. 2026, https://scales.arabpsychology.com/s/differential-personality-inventory-form-l-dpi/.
Mohammed looti. "Differential Personality Inventory–Form L (DPI)." PSYCHOLOGICAL SCALES, 2026. https://scales.arabpsychology.com/s/differential-personality-inventory-form-l-dpi/.
Mohammed looti (2026) 'Differential Personality Inventory–Form L (DPI)', PSYCHOLOGICAL SCALES. Available at: https://scales.arabpsychology.com/s/differential-personality-inventory-form-l-dpi/.
[1] Mohammed looti, "Differential Personality Inventory–Form L (DPI)," PSYCHOLOGICAL SCALES, vol. X, no. Y, ص Z-Z, April, 2026.
Mohammed looti. Differential Personality Inventory–Form L (DPI). PSYCHOLOGICAL SCALES. 2026;vol(issue):pages.