PAI
Definition
Personality Assessment Inventory; 344-item instrument with 22 non-overlapping scales, built on construct-validation strategy; NIM and supplementary indices detect over-reporting.
- Full name
- Personality Assessment Inventory
- Items
- 344
- Scales
- 22 non-overlapping scales
- Validity check
- NIM and supplementary over-reporting indices
Common questions
How does 'non-overlapping' scale construction benefit forensic interpretation?+
Because no item loads onto more than one scale, elevated scores on different scales cannot be an artefact of shared item content, which makes differential diagnosis and cross-scale comparison more defensible when the results are challenged in court.
What does the NIM index actually flag?+
The Negative Impression Management index flags a response pattern suggesting the examinee is exaggerating psychological problems, which is relevant in forensic contexts like malingering assessment for disability claims or diminished-capacity defences.
Related terms
- ANT (Antisocial Features)
- PAI clinical scale with three subscales (Antisocial Behaviors, Egocentricity, Stimulus Seeking); correlates substantially with PCL-R scores in forensic samples.
- Base Rate (BR) Scoring
- MCMI-IV scoring system that replaces T-scores with prevalence-adjusted scores; BR 75 indicates trait elevation, BR 85 supports diagnostic inference.
- F-R (Infrequency-Revised)
- MMPI-2-RF over-reporting validity scale measuring endorsement of rare psychological content; elevation above T=80 raises concern about symptom exaggeration.
- FBS-R (Symptom Validity Scale-Revised)
- MMPI-2-RF scale developed to detect over-reported somatic and cognitive symptoms in personal-injury litigation; contested validity in traumatically injured genuine plaintiffs.
- Fp-R (Infrequency-Psychopathology-Revised)
- MMPI-2-RF over-reporting validity scale measuring endorsement of items rarely endorsed even by genuine psychiatric patients; stronger malingering indicator than F-r in forensic...
- L-R / K-R
- MMPI-2-RF under-reporting validity scales; L-r (Uncommon Virtues) and K-r (Adjustment Validity) detect unrealistically positive self-presentation.
- MAL (Malingering Index)
- PAI configuration-based supplementary index developed for forensic populations to detect feigned psychopathology; used alongside NIM and clinical scales.
- MCMI-IV
- Millon Clinical Multiaxial Inventory, Fourth Edition; 195-item instrument with base-rate scoring, aligned with DSM-5 personality disorder criteria.
- MMPI-2-RF
- Minnesota Multiphasic Personality Inventory-2-Restructured Form; 338-item self-report instrument with 51 scales, the most researched personality measure in forensic psychology.
- NIM (Negative Impression Management)
- PAI primary over-reporting validity scale; T-scores above 73 typically raise concern about feigned psychopathology in forensic evaluations.
- RBS (Response Bias Scale)
- MMPI-2-RF supplementary validity scale predicting performance validity test failure; developed specifically to detect self-reported memory complaints inconsistent with objective testing.