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DARK PERSONALITY TRAITS · SD4 SHORT DARK TETRAD

The Dark Triad (and Tetrad): what these traits are — and are not

Machiavellianism, narcissism, psychopathy and everyday sadism as ordinary personality traits: what the SD4 measures, why it is not a diagnosis, and why you can't test someone else.

· 2 min read

"Is my ex a narcissist?" is one of the most searched personality questions online. The Dark Triad research behind those searches is real — but it describes ordinary traits that everyone has to some degree, not clinical labels to pin on people.

This guide covers what the four traits are, what our dark personality test measures, and the misuses we design against.

QUICK DEFINITION

A dark triad test measures three socially aversive but non-clinical personality traits: Machiavellianism (strategic manipulation), narcissism (grandiosity and entitlement), and psychopathy (impulsivity and low empathy). This test administers the 28-item Short Dark Tetrad (SD4), which measures those three alongside everyday sadism, using the four subscale labels its author supplies for giving feedback. These are ordinary traits that vary across the whole population, not the clinical personality disorders that share their names.

Three traits, plus a fourth

Our test uses the 28-item Short Dark Tetrad (SD4), which measures all three Dark Triad traits in full plus everyday sadism. The friendlier labels in quotes are the instrument author's own: he supplies them for giving feedback because they are far less threatening than the scientific terms. We show both, everywhere.

  • ✦Machiavellianism ("Crafty"): strategic, calculating manipulation.
  • ✦Narcissism ("Special"): grandiosity and entitlement.
  • ✦Psychopathy ("Wild"): impulsivity and low empathy.
  • ✦Everyday sadism ("Mean"): enjoyment of others' discomfort, added in the Dark Tetrad.

A high score is not a diagnosis

These scales share only a name with clinical conditions such as narcissistic or antisocial personality disorder. Those are diagnosed by qualified clinicians over time, using criteria about impairment and distress that no questionnaire contains. A high score means you agreed with more of these statements than the average student in the one sample the scale publishes figures for. That is the whole claim.

Why there is no percentile

The instrument publishes figures for a single sample: 637 undergraduates at one Canadian university, 73% of them women, average age 20. That cannot support a percentile for a general web audience, and a wrong percentile on traits like these does real damage. So every comparison names the sample instead.

You can't test someone else

The SD4 is self-report: it measures what a person says about themselves, and there is no version you can fill in about somebody else. If a relationship is hurting you, the useful questions are what is happening and what you want to do about it — a label applied from a distance answers neither.

It is also easy to fake: every item points the same way and there is no validity scale. That is why it should never be used where the answer matters to the person giving it — including hiring.

TRY IT YOURSELF

Take the free Dark Personality Traits test

28 questions, about 5 min. No sign-up — your answers stay on your device.

Start the test →

This guide is for self-reflection and general education. It is not medical, psychological, or career advice, and no questionnaire here is a diagnosis.

Keep reading

PERSONALITYThe 16 personality types, explained without the hypePERSONALITYThe Big Five personality traits (OCEAN), explainedPERSONALITYThe Enneagram's nine types: a useful mirror, not a measurement

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SOURCES

Where the facts in this guide come from

  1. [1]
    Paulhus, D. L., Buckels, E. E., Trapnell, P. D., & Jones, D. N. (2021). Screening for dark personalities: The Short Dark Tetrad (SD4). European Journal of Psychological Assessment, 37(3), 208–222. ↗

    The source of the 28 items, the four seven-item subscales, the response format, and the norms used on the result page. The instrument is distributed by its first author under the heading “In the Public Domain — available without permission”, which is why it can be implemented here and checked against the source.

  2. [2]
    Jones, D. N., & Paulhus, D. L. (2014). Introducing the Short Dark Triad (SD3): A brief measure of dark personality traits. Assessment, 21(1), 28–41. ↗

    The better-known three-trait predecessor, and the measure most people mean by “dark triad test”. It is not the instrument used here: its author’s measures page no longer lists it under any permission heading, so there is no current statement granting its use, and the SD4 supersedes it.

  3. [3]
    Paulhus, D. L. (2014). Toward a taxonomy of dark personalities. Current Directions in Psychological Science, 23(6), 421–426. ↗

    Why these traits are described here as subclinical and continuous rather than as categories. The dark traits are ordinary dimensions on which everyone falls somewhere, and they overlap with each other rather than forming distinct types of person.

  4. [4]
    Miller, J. D., Lynam, D. R., Hyatt, C. S., & Campbell, W. K. (2017). Controversies in narcissism. Annual Review of Clinical Psychology, 13, 291–315. ↗

    The basis for this site’s insistence that trait narcissism and narcissistic personality disorder are different things measured in different ways. Self-report trait scales and clinical diagnosis of NPD do not interchange, and treating a questionnaire score as a diagnosis is the most common misuse of this literature.