Narcissistic Personality Inventory (NPI-40)
Narcissistic Personality Inventory (NPI-40) normative dataset currently contains 7 participant records collected between Jul 3, 2026 and Jul 14, 2026 .
This psychometric dataset currently includes 7 anonymous participant responses collected through voluntary participation. The observed mean score was 41.57 with a standard deviation of 21.7, indicating moderate score variability within the sampled population. Internal consistency reliability analysis produced a Cronbach alpha of 0, which falls below commonly accepted psychometric standards and should be interpreted cautiously until additional data are collected. Observed skewness (0.01) and kurtosis (-1) were examined as indicators of distribution quality. The score distribution appeared reasonably balanced and did not suggest substantial departures from normality.
| Assessment | Narcissistic Personality Inventory (NPI-40) |
| Research Status | Preliminary Dataset |
| Dataset Maturity | 5 /100 — PRELIMINARY |
| Participants | 7 |
| Countries Represented | 3 |
| Items | 40 |
| Dimensions | 6 |
| Data Collection Period | Jul 3, 2026 – Jul 14, 2026 |
| Reliability | α = 0 |
| Statistic | Value |
|---|---|
| Mean Score | 41.57% |
| Median Score | 40 |
| Standard Deviation | 21.7 |
| Variance | 470.95 |
| Standard Error | 8.2 |
| 95% CI Lower | 25.49 |
| 95% CI Upper | 57.65 |
| Minimum Score | 15% |
| Maximum Score | 73% |
| Observed Range | 58 |
| Variable | Summary |
|---|---|
| Participants | N = 7 |
| Countries | 3 |
| Age Information | Available |
| Gender Information | Available |
| Percentile | Score | Interpretation |
|---|---|---|
| 10th | 15% | Very Low |
| 25th | 15% | Below Average |
| 50th | 40% | Average |
| 75th | 50% | Above Average |
| 90th | 60% | Elevated |
| Metric | Value |
|---|---|
| Cronbach Alpha | 0 |
| Reliability Classification | Unacceptable |
| Participants | 7 |
| Items | 40 |
| Standard Error | 8.2 |
Item–total correlations are not currently reported because the assessment has fewer than 100 participant responses. Psychometric item analysis requires a larger sample to produce stable and interpretable estimates.
Current Participants: 7
Minimum Recommended: 100
| Dimension | Mean | SD | N |
|---|---|---|---|
| Entitlement | 62% | 35.7 | 7 |
| Authority | 51.43% | 27.34 | 7 |
| Manipulativeness | 46.43% | 39.34 | 7 |
| Self-Sufficiency | 42.86% | 27.82 | 7 |
| Exhibitionism | 32.29% | 18.91 | 7 |
| Superiority | 30.57% | 27.79 | 7 |
| Metric | Value |
|---|---|
| Current Participants | 7 |
| Countries | 3 |
| Collection Start | Jul 3, 2026 |
| Collection End | Jul 14, 2026 |
| Months Recorded | 1 |
A total of 7 participant responses were available for this assessment. Dimension-level norms were calculated using 7 valid response records. Approximately 0 response record(s) were excluded from dimension-level normative calculations due to incomplete response patterns.
Limitations
Normative statistics are derived from voluntary participation and may not represent all populations. Reliability estimates, percentile norms, and dimension statistics should be interpreted in the context of the current sample and may change as additional responses are collected.
Ethical Statement
All records included in this dataset were collected anonymously. No personally identifying information is stored. Data are intended for educational, psychometric, and research purposes.