RESUMO
The extent to which psychopathy can be reliably assessed via self-report has been debated. One step in informing this debate is examining the internal consistency of self-report psychopathy measures, such as the Triarchic Psychopathy Measure (TriPM; Patrick, 2010). Reliability generalization (RG) studies apply a meta-analytic approach to examine the internal consistency of an instrument in a more robust manner by aggregating internal consistency statistics reported across the published literature. This study conducted an RG analysis to yield the average Cronbach's alpha among published studies (k = 219) that administered the TriPM. Meta-analytic alphas were high for TriPM Total (α = .88) Boldness (α = .81), Meanness (α = .87), and Disinhibition (α = .85). Moderator analyses indicated internal consistency differed minimally as a function of study characteristics, like gender, age, or the nature of the sample (i.e., forensic or community). Subsequent RG analyses were performed for McDonald's omega (k = 40), which yielded comparable internal consistency estimates. The results of this study provide strong evidence that the TriPM measures coherent, internally consistent constructs and thus could be a viable, cost-effective mechanism for measuring psychopathy across a broad range of samples.
RESUMO
BACKGROUND: The triarchic model (Patrick et al., 2009) conceptualizes psychopathy as a multidimensional construct encompassing three biobehavioral dimensions: meanness, boldness, and disinhibition. Meanness entails low empathy, shallow affect, and lack of remorse, and is associated with poor facial emotion recognition; however, the mechanistic processes contributing to these deficits are unclear. Emotional face processing can be examined on a neurophysiological level using event-related potentials (ERPs) such as N170, P200, and LPP. No quantitative review to date has examined the extent to which amplitude of these ERP components may be modulated by psychopathic traits. METHOD: The current study performed random-effects model meta-analyses of nine studies (N = 1131) which examined affective face processing ERPs in individuals with psychopathic traits to provide an overall effect size for the association between meanness, boldness, and disinhibition and N170, P200, and LPP amplitudes across studies. Analyses were also conducted examining potential moderators and publication bias. RESULTS: N170 amplitudes were significantly smaller (r =.18) among individuals high in meanness when processing fearful faces. Significant effects were not found for N170 amplitude when processing angry or happy faces, nor for LPP and P200 amplitudes across stimulus types. Additionally, significant effects were not found for the association between N170 amplitude and other dimensions of psychopathy. Meta-regression analyses indicated the manipulation of facial stimuli was significant in explaining some between-study heterogeneity of the meanness N170-fear model. No evidence of publication bias was found. CONCLUSIONS: Diminished amplitude of the N170 when viewing fear faces appears to be a neurophysiological marker of psychopathic meanness. Deficits in early encoding of faces may account for empathy deficits characteristic of psychopathy.
