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Short Dark Triad (SD3)

Twenty-seven statements used in personality research to describe three overlapping socially aversive trait dimensions.

Method and research sources

What SD3 measures

SD3 estimates Machiavellianism, grandiose narcissism, and subclinical psychopathy with nine statements per scale. The constructs overlap, and later research has questioned how cleanly some scales separate.

How scoring works

Responses run from 1 to 5. Five items are reverse-scored. The nine keyed responses for each trait are averaged, producing three values from 1.00 to 5.00; there is no overall Dark Triad score.

Method and sources

The original SD3 paper and recent psychometric reviews are listed below.

  1. Original publication2014
  2. Scientific review2025
  3. Scientific review2024

Related resources are selected by personality and relationship topics, not by your profile.

Questions about the Dark Triad

Is there a normal or dangerous cut-off?

No universal clinical cut-off is used here. SD3 is a dimensional research measure, not a risk assessment.

Does a high value mean a disorder?

No. The scale covers subclinical traits and cannot establish a personality-disorder diagnosis.

Why are some items scored in reverse?

Reverse-keyed items reduce automatic agreement and are converted internally. The interface does not mark them because every statement should be answered naturally.