NIM (Negative Impression Management)
Definition
PAI primary over-reporting validity scale; T-scores above 73 typically raise concern about feigned psychopathology in forensic evaluations.
- Instrument
- Personality Assessment Inventory (PAI)
- Scale type
- Primary over-reporting validity scale
- Concern threshold
- T-scores above 73
- Use
- Flags possible feigned psychopathology
Common questions
How does an elevated NIM score affect interpretation of the rest of the PAI profile?+
When NIM crosses the concern threshold, the evaluator treats the clinical scale elevations with caution because the response pattern suggests the person may be exaggerating or fabricating symptoms, which can inflate scores across multiple unrelated scales.
Does a high NIM score alone prove malingering?+
No. It flags a response style consistent with over-reporting, but a forensic evaluator must integrate it with collateral information, symptom consistency across sources, and other validity indicators before concluding that symptoms are feigned.
What distinguishes NIM from PAI scales that detect under-reporting?+
NIM targets exaggerated or invented pathology, the opposite pattern from PAI's under-reporting scales, which flag someone minimizing genuine problems, so the two serve as complementary checks on response honesty in opposite directions.
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.
- PAI
- Personality Assessment Inventory; 344-item instrument with 22 non-overlapping scales, built on construct-validation strategy; NIM and supplementary indices detect over-reporting.
- 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.