The Dirty Dozen (Jonason & Webster, 2010) is a frequently used concise version of the Dark Triad to measure three socially aversive personality traits: Machiavellianism, psychopathy and, narcissism. The present study has examined measurement invariance in a sample of Belgian adults. The present study aims to assess measurement invariance of the Dutch version of the Dirty Dozen measure across gender in a large city-based representative adult sample in Belgium (N = 1587). Multi-group first-order confirmatory factor analysis for categorical indicators was utilized. In addition, unique associations between Dirty Dozen traits, trait self-control and, acceptance of illegitimate norms were examined in a series of structural equation models. Results indicated that the internal consistency of the Dirty Dozen subscales was good for Machiavellianism (α = 0.80) and narcissism (α = 0.80), but modest for psychopathy (α = 0.64). The hypothesized three correlated factors model with separate factors for Machiavellianism, psychopathy and, narcissism provided a poor fit for men and women. Invariance testing across gender showed evidence for weak invariance only, indicating that the underlying latent factors are measured the same way with the same metric in the two populations. However, we were not able to establish strong measurement invariance. Observed group differences should be interpreted with caution. Furthermore, Machiavellianism and psychopathy were strongly associated with trait self-control in both men and women. Strong correlations were found between acceptance of illegitimate norms and Dirty Dozen traits, Machiavellianism and, psychopathy, but not with narcissism.

中文翻译：

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在比利时成人样本中测试黑暗三合会的测量不变性。

The Dirty Dozen (Jonason & Webster, 2010) 是黑暗三合会的一个常用简明版本，用于衡量三种厌恶社交的人格特征：马基雅维利主义、精神病和自恋。本研究检查了比利时成年人样本中的测量不变性。本研究旨在评估荷兰版 Dirty Dozen 测量在比利时大型城市代表性成人样本（N = 1587）中跨性别的测量不变性。对分类指标采用多组一阶验证性因子分析。此外，在一系列结构方程模型中检查了肮脏的十二种特质、特质自我控制和接受非法规范之间的独特关联。结果表明，肮脏的十二个分量表的内部一致性对马基雅维利主义（α = 0.80）和自恋（α = 0.80）有好处，但对精神病（α = 0.64）来说是适度的。假设的三个相关因素模型与马基雅维利主义、精神病和自恋的不同因素提供了对男性和女性的不良拟合。跨性别的不变性测试仅显示弱不变性的证据，这表明潜在的潜在因素在两个群体中以相同的度量方式以相同的方式进行测量。然而，我们无法建立强大的测量不变性。应谨慎解释观察到的组间差异。此外，马基雅维利主义和精神病与男性和女性的特质自我控制密切相关。