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The Dark Triad In Adult Sibling Dyads

Table 1:

Dark Triad Self-ratings Older sibling (ratings by the younger sibling) Younger sibling (ratings by the older sibling)
Older sibling Younger sibling
Machiavellianism 2.3 (0.81) 2.33 (0.86) 2.38 (0.92) 2.53 (0.78)
Narcissism 2.94 (0.88) 2.83 (0.84) 2.87 (0.84) 2.92 (0.86)
Psychopathy 2.7 (0.84) 2.78 (0.89) 2.61 (0.83) 2.65 (0.77)
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