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  • 1.
    Kajonius, Petri J.
    et al.
    University of Gothenburg, Sweden.
    Persson, Björn N.
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre.
    Jonason, Peter K.
    University of Western Sydney, Australia.
    Hedonism, Achievement, and Power: Universal Values that Characterize the Dark Triad2015In: Personality and Individual Differences, ISSN 0191-8869, E-ISSN 1873-3549, Vol. 77, p. 173-178Article in journal (Refereed)
    Abstract [en]

    Using a sample of Swedes and Americans (N = 385), we attempted to understand the Dark Triad traits (i.e., Machiavellianism, narcissism, and psychopathy) in terms of the universal social values. The Dark Triad traits correlated significantly with all 10 value types, forming a sinusoid pattern corresponding to the value model circumplex. In regression analyses, Machiavellianism and narcissism were positively associated with the values Achievement and Power, while psychopathy was positively associated with the values Hedonism, and Power. In addition, the Dark Triad traits explained significant variance over the Big Five traits in accounting for individual differences in social values. Differences between the Swedish and the US sample in the social value Achievement was mediated by the Dark Triad traits, as well as age. Given the unique complex of values accounted for by the Dark Triad traits compared to the Big Five traits, we argue that the former account for a system of self-enhancing “dark values”, often hidden but constantly contributing in evaluations of others.

  • 2.
    Kajonius, Petri
    et al.
    University of Skövde, The Systems Biology Research Centre. University of Skövde, School of Bioscience. University West, Sweden / University of Gothenburg, Sweden.
    Johnson, John
    Pennsylvania State University, United States.
    Sex differences in 30 facets of the five factor model of personality in the large public (N = 320,128)2018In: Personality and Individual Differences, ISSN 0191-8869, E-ISSN 1873-3549, Vol. 129, p. 126-130Article in journal (Refereed)
    Abstract [en]

    The present study reports on the scope and size of sex differences in 30 personality facet traits, using one of the largest US samples to date (N = 320,128). The study was one of the first to utilize the open access version of the Five-Factor Model of personality (IPIP-NEO-120) in the large public. Overall, across age-groups 19–69 years old, women scored notably higher than men in Agreeableness (d = 0.58) and Neuroticism (d = 0.40). Specifically, women scored d > 0.50 in facet traits Anxiety, Vulnerability, Openness to Emotions, Altruism, and Sympathy, while men only scored slightly higher (d > 0.20) than women in facet traits Excitement-seeking and Openness to Intellect. Sex gaps in the five trait domains were fairly constant across all age-groups, with the exception for age-group 19–29 years old. The discussion centers on how to interpret effects sizes in sex differences in personality traits, and tentative consequences. 

  • 3.
    Persson, Björn
    et al.
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of Psychology, University of Turku, Finland.
    Lilienfeld, Scott O.
    Department of Psychology, Emory University, Atlanta, GA, United States of America / School of Psychological Sciences, University of Melbourne, Melbourne, Australia.
    Social status as one key indicator of successful psychopathy: An initial empirical investigation2019In: Personality and Individual Differences, ISSN 0191-8869, E-ISSN 1873-3549, Vol. 141, p. 209-217Article in journal (Refereed)
    Abstract [en]

    Psychopathy is a personality disorder that researchers have subdivided into two types: successful and unsuccessful. Nevertheless, little headway has been made regarding how to conceptualize and operationalize success. We consider various accounts of success from the existing literature and make the case for a two-dimensional view of successful psychopathy. Specifically, we contend that successful psychopathy can be conceptualized with two conditions in mind: (a) high social status and (b) lack of serious antisocial behavior. We emphasize that high social status, best described using socioeconomic status (SES), has been largely overlooked in the literature. We tested this idea using a sample of 591 participants who received measures of the triarchic model of psychopathy (i.e., boldness, meanness, and disinhibition), SES, and personality dysfunction. The results demonstrated that, as predicted, the putatively adaptive features of psychopathy (i.e., boldness) were positively related to SES and personality functioning. In contrast, the putatively maladaptive psychopathy features disinhibition and meanness were negatively related to personality functioning, and disinhibition was negatively related to SES. The relevance of boldness to psychopathy and the benefits of conceptualizing success as a continuous variable are discussed.

  • 4.
    Persson, Björn N.
    et al.
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Network for Empowerment and Well-Being, Sweden.
    Kajonius, Petri J.
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Network for Empowerment and Well-Being, Sweden / Department of Psychology, University of Gothenburg, Sweden / Department of Behavioral Sciences, University West, Sweden.
    Garcia, Denilo
    Network for Empowerment and Well-Being, Sweden / Department of Psychology, University of Gothenburg, Sweden / Blekinge Center of Competence, County Council, Karlskrona, Sweden / Department of Psychology, Lund University, Sweden.
    Testing construct independence in the Short Dark Triad using Item Response Theory2017In: Personality and Individual Differences, ISSN 0191-8869, E-ISSN 1873-3549, Vol. 117, p. 74-80Article in journal (Refereed)
    Abstract [en]

    The Dark Triad (i.e., Machiavellianism, narcissism and psychopathy) is a popular construct for describing socially aversive personality traits. In recent years, the Short Dark Triad (SD3; Jones & Paulhus, 2014) has become a popular measure for assessing the Dark Triad constructs. However, recent research has called the supposed dissimilarity between the Dark Triad constructs into question. In particular, theoretical and empirical evidence suggests that a distinction between Machiavellianism and psychopathy may not be tenable. In order to investigate this issue further, we analyzed the SD3 in a large sample (N = 1983) using Item Response Theory. We establish item response parameter estimates for each Dark Triad construct and further test whether the Dark Triad constructs can be modelled together. Results show that Machiavellianism and narcissism could not be modelled together, but the combinations Machiavellianism and psychopathy, and narcissism and psychopathy, yielded acceptable model fit. The implications of these results are discussed in terms of how the Dark Triad constructs may be interpreted and studied in the future.

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