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Personality Dark Triad: Portuguese Validation of the Dirty Dozen

Published online by Cambridge University Press:  23 March 2020

A. Macedo ,
A.I. Araújo ,
C. Cabaços ,
M.J. Brito ,
L. Mendonça  and
A.T. Pereira
A. Macedo
Affiliation:
Faculty of Medicine, University of Coimbra, Department of Psychological Medicine, Coimbra, Portugal
A.I. Araújo
Affiliation:
Faculty of Medicine, University of Coimbra, Department of Psychological Medicine, Macieira de Cambra, Portugal
C. Cabaços
Affiliation:
Faculty of Medicine, University of Coimbra, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
M.J. Brito
Affiliation:
Faculty of Medicine, University of Coimbra, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
L. Mendonça
Affiliation:
Faculty of Medicine, University of Coimbra, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
A.T. Pereira
Affiliation:
Faculty of Medicine, University of Coimbra, Department of Psychological Medicine, Coimbra, Portugal

Abstract

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Introduction

The Dark Triad is a term used to describe a constellation of three socially undesirable personality traits: narcissism, psychopathy, and Machiavellianism. Contrary to Altruism (the desire to help others with no personal reward or gain), these traits are harmful to others. Given the increased scientific interest on the dark triad, Jonason and Webster developed a shorter questionnaire to evaluate these three independent-yet-related constructs with only 12 items – Dirty Dozen (D12).

Objective

To investigate the psychometric properties of the Portuguese version of the Dirty Dozen.

Methods

A community sample composed of 286 university students (69.2% females; mean age = 21.09 ± 2.133; range: 17–33) answered the Portuguese preliminary versions of the Dirty Dozen and of the Altruism dimension from HEXACO-100. To study the temporal stability, 30 participants (66.7% females) answered the D12 again after six weeks.

Results

The EA Cronbach alpha was “very good” (a = 0.72). Following Kaiser and Cattel Scree Plot criteria, three meaningful factors were extracted which explained variance (EV) was of 54.64%: F1 Machiavellianism (EV 32.07%; a = 0.73), F2 Narcissism (13.665%; a = 0.74), F3 Psychopathy (8.90%; a = 0.64). The test-retest correlation coefficients were high, positive and significant for the total D12 and its dimensions (r > 0.70; P < 0.001). Pearson correlations of D12 total and dimensional scores and Altruism were negative, moderate and significant (r@ − 0.30).

Conclusions

The Portuguese version of Dirty Dozen has good reliability and validity. It could be very useful both in clinical and research contexts, namely in an ongoing project on the relationship between dark triad and perfectionism traits.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Type
e-Poster Viewing: Personality and personality disorders
Information
European Psychiatry , Volume 41 , Issue S1: Abstract of the 25th European Congress of Psychiatry , April 2017 , pp. S711
Copyright
Copyright © European Psychiatric Association 2017
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