11 articles
Borderline personality disorder statistics: 5.9% lifetime prevalence in the research, and 6.4% of 6,507 Dark Mirror takers lead on the borderline axis. Here are both, kept apart.
Across 6,507 Dark Mirror takers, 21.0% lead on the psychopathic axis and 4.6% on the narcissistic axis. The quiz does not measure Machiavellianism, so this is a portrait, not a dark triad rate.
The diagnosis behind the word is antisocial personality disorder, and its lifetime prevalence is 3.6% of US adults. Among 5,000+ Dark Mirror takers, 9.1% lead on the sociopathic axis.
Of 6,507 Dark Mirror takers, 4.6% lead on the narcissistic axis and just 2 people score in the high band. The clinical literature puts narcissistic personality disorder at 6.2% lifetime.
About 1 in 83 when a clinician scores the PCL-R, about 1 in 22 when every instrument is pooled, about 1 in 19 on self-report. The ratio makes it obvious that these are four different rooms, and shows you which one you are standing in.
Cold and sociopathic are not the same axis. On the Dark Mirror, coldness scores psychopathic; the sociopathic axis rises with heat, impulse and rule-breaking. Only 0.3% of takers score high on it. Here is how to tell which one you are reading.
On the Dark Mirror, the average narcissistic score is about 10 out of 100. Four in five takers sit at baseline and one person in 2,000+ scores high. That is not because narcissists are rare. It is because of how a self-report works, and here is the whole curve.
On the Dark Mirror, the median psychopathic score is 20 out of 100. A 45 already beats four in five takers. Here is how to read your number against everyone else, band by band, with the live percentile ladder.
The best meta-analysis puts psychopathy at 4.5% of adults overall and 1.2% on the clinician-scored PCL-R. Among people who choose to take a dark psychology test, 21% lean psychopathic and 4% score high. Every figure, with its study, and what the gap actually means.
New York, London, Chicago and Los Angeles send the most people to the Dark Mirror. Which of them scores darkest is a different question, and the Index answers it live, by browser timezone, with every caveat attached.
Nearly half of the people who sit my dark psychology quiz are handed the most ordinary result on it. That is not the quiz failing. It is what a self-report does with a curious audience, and the interesting number is what came second.