Methodology · Edition 142
How the Index is made, and what it is not
The Dark Mirror Index is an audience portrait: every number on it describes the 3,155 people who took a twenty-item scenario quiz on this site, not a population. This page is the whole method: the instrument, who is in the sample, what is excluded, how the percentiles and bands are computed, how reliable the axes are, how the figures sit beside published prevalence, and how to cite it.
The instrument
Twenty scenarios, each with six answers, each answer attributed to one of six axes: psychopathic, sociopathic, narcissistic, borderline, histrionic and neurotypical. An axis score is the share of the twenty answers that went to that axis, so scores move in steps of five and the six scores always sum to 100. The quiz is forced-choice: an answer that goes to one axis is an answer that does not go to the other five, so a high score on one axis mechanically lowers the rest. That matters for the correlations below.
A taker's type is their highest axis. When two axes tie at the top, the tie goes to the axis listed first in the order above, which means a tie between a dark axis and neurotypical goes to the dark axis. That is a bias, it is small, and it is stated here rather than hidden.
The items have not changed since the quiz opened on 4 April 2026 (instrument v1). If they ever change, the time series breaks; any revision will be versioned and every page will say which version its numbers came from.
Who is in the sample
Anyone who finished the quiz on kanikarose.com or in the app since 4 April 2026, worldwide, in English. Most arrive from Kanika Batra's own channels, some from search, some from a friend. That makes it a self-selected sample of people interested in dark psychology, drawn toward a creator who is diagnosed with ASPD and clinically assessed as Factor 1 psychopathy. Every share on the Index is therefore expected to run above a community estimate, and the section on the literature below says by how much and why.
Region is inferred from the browser's timezone, so "New York" means Eastern-time takers rather than the five boroughs; regions with fewer than 30 takes are held back, and no region is ranked against another below 100. Optional one-tap fields (age bracket, gender, work area, how the taker found the quiz, and the type they expected before the reveal) are collected after the result, never required, and reported only in aggregate once each group clears its floor.
What is excluded
The live counter on the hub counts takes. The sample behind every chart counts takers, after these rules, applied on every edition:
- Rows without scores or a recognised type are dropped.
- Second and later takes by the same account are dropped from the charts (kept only for the test-retest figure below).
- Takes finished in under sixty seconds are dropped. Completion time is recorded from 18 August 2026; earlier takes have no time and are kept.
- Takes with eighteen or more of twenty answers on one axis are counted and flagged here, not excluded: on a forced-choice scenario quiz an extreme profile can be a real one.
| Ledger, this edition | Rows |
|---|---|
| Takes recorded | 3,160 |
| Dropped: no scores or unknown type | 0 |
| Dropped: retakes by the same account | 2 |
| Dropped: under sixty seconds (of 836 timed takes) | 3 |
| Flagged, kept: 18+ answers on one axis | 116 |
| In the sample | 3,155 |
How the numbers are computed
Percentiles are mid-rank against everyone in the sample: "higher than 91%" means 91% scored strictly lower plus half of those who tied, which is the standard definition and the only one that behaves when scores can only take twenty-one values. Percentiles are clamped to 0 to 99, so nobody is told they beat everyone.
Bands are fixed cut points on the 0 to 100 axis score: baseline 0 to 15, traits 20 to 35, pronounced 40 to 55, high 60 to 100. "High" starts at 60 so that it means at least twelve of twenty answers went to one axis. Bands are the Index's reading aid. They are not clinical thresholds and were not derived from any clinical instrument.
Editions. The histograms behind every chart are recomputed once a day at 09:41 UTC and stored; each recomputation is a numbered edition (days since 4 April 2026). If a day is missed the next read recomputes. The hero counter is live; the charts are the morning's edition; the dateline says which.
Uncertainty. Every share the Index prints carries a 95% Wilson score interval, and one set of floors decides what is shown at all: no share below 30 takes, no ranking below 100, no "top 1%" threshold below 1,000 on an axis, no reliability figure below 1,000 complete answer sets, no retest figure below 50 pairs. Where two groups' intervals overlap, the pages show them tied rather than ordered.
Reliability and structure
Internal consistency per axis is KR-20 (Cronbach's alpha for binary items) over twenty indicators of "this item went to this axis", from 3,155 complete answer sets. An axis is only as consistent as it is used: an axis that most takers put one or two answers on (histrionic averages under one) cannot read high on this statistic whatever the items are like, so read the figures beside the mean. They are published as they come out.
| Axis | KR-20 | Mean items | SD |
|---|---|---|---|
| Psychopathic | 0.81 | 4.50 | 3.78 |
| Sociopathic | 0.52 | 3.33 | 2.29 |
| Narcissistic | 0.55 | 2.05 | 1.91 |
| Borderline | 0.74 | 2.20 | 2.47 |
| Histrionic | 0.25 | 0.47 | 0.75 |
| Neurotypical | 0.88 | 7.46 | 5.16 |
Correlations between axis scores (Pearson, n = 3,155). Because the six scores sum to 100, they are negatively correlated by construction; read the matrix for which axes trade off most and least, not as evidence of distinct factors.
| Psyc | Soci | Narc | Bord | Hist | Neur | |
|---|---|---|---|---|---|---|
| Psychopathic | 1 | 0.04 | 0.14 | -0.44 | -0.04 | -0.59 |
| Sociopathic | 0.04 | 1 | 0.26 | -0.07 | 0.17 | -0.56 |
| Narcissistic | 0.14 | 0.26 | 1 | -0.09 | 0.22 | -0.57 |
| Borderline | -0.44 | -0.07 | -0.09 | 1 | 0.20 | -0.12 |
| Histrionic | -0.04 | 0.17 | 0.22 | 0.20 | 1 | -0.37 |
| Neurotypical | -0.59 | -0.56 | -0.57 | -0.12 | -0.37 | 1 |
Test-retest. Not enough yet. 2 people have taken the quiz twice on the same account; the figure publishes at 50 pairs, and the 90-day second sitting will build it.
Beside the literature
The Index will read higher than every row above, and it should. People who take a dark-psychology quiz on a dark-psychology creator's site are not a community sample; the meta-analysis itself finds self-selected and organizational samples running four to seven times the community rate. Our high band is also a reading aid on a self-report screener, not a PCL-R assessment. Read the Index as an audience portrait beside the literature, never as a rival estimate of prevalence.
| Published | Figure | Population and method |
|---|---|---|
| Psychopathy, all instruments | 4.5% (95% CI 1.6 to 7.9) | General adult population, 15 studies, 11,497 people. Meta-analysis. |
| Psychopathy, PCL-R (clinician-rated) | 1.2% (95% CI 0 to 3.7) | General adult population. Meta-analysis, PCL-R studies only. |
| Psychopathy, self-report scales | 5.4% (95% CI 1.9 to 9.5) | General adult population. Meta-analysis, self-report studies. |
| Psychopathy by sample type | Community 1.9%, students 8.1%, organizations 12.9% | General adult population, split by where the sample was drawn. Meta-analysis subgroups. |
| Psychopathy by sex | Men 7.9%, women 2.9% | General adult population. Meta-analysis subgroups. |
| Antisocial personality disorder (the DSM diagnosis) | 3.6% lifetime | US adults, NESARC wave 1, 43,093 people. Structured diagnostic interview. |
| Narcissistic personality disorder | 6.2% lifetime; point prevalence usually quoted near 1% | US adults, NESARC wave 2, 34,653 people. Structured diagnostic interview. |
| Borderline personality disorder | 5.9% lifetime; DSM-5-TR median point prevalence 1.6% | US adults, NESARC wave 2, 34,653 people. Structured diagnostic interview. |
| Histrionic personality disorder | 1.8% lifetime | US adults, NESARC wave 1. Structured diagnostic interview. |
The Index's own high-band shares, same edition, with intervals:
- Psychopathic6% (5 to 7%)
- Sociopathic0%
- Narcissistic0%
- Borderline1% (0 to 1%)
- Histrionic0%
- Neurotypical24% (23 to 26%)
"High" is 60 or more on the axis, a reading aid on a self-report screener. Factor 1 and Factor 2 are terms from Hare's PCL-R, not the DSM; the DSM diagnosis is antisocial personality disorder. Nothing in this table validates the quiz against either.
What this is not
- Not a diagnosis. Only a clinician can make one, and only with a proper assessment.
- Not the PCL-R, the LSRP, the SD3 or the TriPM, and not validated against any of them.
- Not a population estimate. Every share is a share of people who took this quiz.
- Not clinical thresholds. The four bands are fixed cut points chosen for reading, stated above.
- Not independently reviewed yet. A named methodological review is being sought and will be published here verbatim, reservations included.
Change log
- 2026-04-04 Quiz opens; instrument v1.
- 2026-08-16 Index launches: daily editions, mid-rank percentiles, four bands, regions at 30+.
- 2026-08-18 Snapshot rules v2: retakes and sub-sixty-second takes excluded, exclusion ledger, Wilson intervals and floors, reliability figures, completion time and optional gender, work area, how-found and expected-type fields collected. This page published.
Cite this
Aggregates on every Index page and the downloadable histograms at the data page are licensed CC BY 4.0: use them, with a link back to the edition you used. Individual takes are never released.
Batra, K. (2026). The Dark Mirror Index, Edition 142 (n = 3,155) [dataset]. kanikarose.com. https://kanikarose.com/dark-mirror-index (retrieved 23 August 2026).
Numbered, dated facts for quoting live at the statistics page. Written and read by Kanika Batra, diagnosed ASPD, clinically assessed as Factor 1 psychopathy.
Add yourself to the sample.
Twenty scenarios, seven minutes, then your band and percentile on every axis, read the same way this page reads everyone else.