Several scholars have recognized the limitations of theories of moral reasoning in explaining mor... more Several scholars have recognized the limitations of theories of moral reasoning in explaining moral behavior. They have argued that moral behavior may also be influenced by moral identity, or how central morality is to one's sense of self. This idea has been supported by findings that people who exemplify moral behavior tend to place more importance on moral traits when
Psychopathy, Machiavellianism, and narcissism are three constructs that have been collectively re... more Psychopathy, Machiavellianism, and narcissism are three constructs that have been collectively referred to as the "Dark Triad." Although researchers were initially interested in comparing similarities and differences between these constructs, in recent years researchers have combined items from the measures to create an overall measure of the Dark Triad as a single construct. The authors raise theoretical concerns regarding this approach, arguing that Machiavellianism and narcissism can be viewed as features or traits of psychopathy. They also provide empirical evidence from a large, correctional sample (N = 972) to demonstrate that a latent Dark Triad could not be estimated using confirmatory factor analysis because more than 100% of the variance was attributed to psychopathy. Moreover, the Dark Triad traits, by and large, did not confer incremental validity above and beyond psychopathy, and none of the interaction models indicated that additional information would be gai...
Recent investigations of the psychobiology of stress in antisocial youth have benefited from a mu... more Recent investigations of the psychobiology of stress in antisocial youth have benefited from a multi-system measurement model. The inclusion of salivary alpha-amylase (sAA), a surrogate marker of autonomic/sympathetic nervous system (ANS) activity, in addition to salivary cortisol, a biomarker of the hypothalamic-pituitary-adrenal (HPA) axis functioning, has helped define a more complete picture of individual differences and potential dysfunction in the stress response system of these individuals. To the authors' knowledge, no studies have examined sAA in relation to antisocial behavior in adults or in relation to psychopathic traits specifically. In the present study, we examined sAA, in addition to salivary cortisol, in a relatively large sample (n = 158) of adult males (M age = 36.81, range = 22-67 years; 44% African-American, 34% Caucasian, 16% Hispanic) recruited from temporary employment agencies with varying levels of psychopathic traits. Males scoring highest in psychopathy were found to have attenuated sAA reactivity to social stress compared to those scoring lower in psychopathy. No differential relationships with the different factors of psychopathy were observed. In contrast to studies of antisocial youth, there were no interactions between sAA and cortisol levels in relation to psychopathy, but there was a significant interaction between pre-stressor levels of sAA and cortisol.
Several scholars have recognized the limitations of theories of moral reasoning in explaining mor... more Several scholars have recognized the limitations of theories of moral reasoning in explaining moral behavior. They have argued that moral behavior may also be influenced by moral identity, or how central morality is to one's sense of self. This idea has been supported by findings that people who exemplify moral behavior tend to place more importance on moral traits when
Psychopathy, Machiavellianism, and narcissism are three constructs that have been collectively re... more Psychopathy, Machiavellianism, and narcissism are three constructs that have been collectively referred to as the "Dark Triad." Although researchers were initially interested in comparing similarities and differences between these constructs, in recent years researchers have combined items from the measures to create an overall measure of the Dark Triad as a single construct. The authors raise theoretical concerns regarding this approach, arguing that Machiavellianism and narcissism can be viewed as features or traits of psychopathy. They also provide empirical evidence from a large, correctional sample (N = 972) to demonstrate that a latent Dark Triad could not be estimated using confirmatory factor analysis because more than 100% of the variance was attributed to psychopathy. Moreover, the Dark Triad traits, by and large, did not confer incremental validity above and beyond psychopathy, and none of the interaction models indicated that additional information would be gai...
Recent investigations of the psychobiology of stress in antisocial youth have benefited from a mu... more Recent investigations of the psychobiology of stress in antisocial youth have benefited from a multi-system measurement model. The inclusion of salivary alpha-amylase (sAA), a surrogate marker of autonomic/sympathetic nervous system (ANS) activity, in addition to salivary cortisol, a biomarker of the hypothalamic-pituitary-adrenal (HPA) axis functioning, has helped define a more complete picture of individual differences and potential dysfunction in the stress response system of these individuals. To the authors' knowledge, no studies have examined sAA in relation to antisocial behavior in adults or in relation to psychopathic traits specifically. In the present study, we examined sAA, in addition to salivary cortisol, in a relatively large sample (n = 158) of adult males (M age = 36.81, range = 22-67 years; 44% African-American, 34% Caucasian, 16% Hispanic) recruited from temporary employment agencies with varying levels of psychopathic traits. Males scoring highest in psychopathy were found to have attenuated sAA reactivity to social stress compared to those scoring lower in psychopathy. No differential relationships with the different factors of psychopathy were observed. In contrast to studies of antisocial youth, there were no interactions between sAA and cortisol levels in relation to psychopathy, but there was a significant interaction between pre-stressor levels of sAA and cortisol.
Coping Power is an evidence-based preventive intervention program for youth with aggressive behav... more Coping Power is an evidence-based preventive intervention program for youth with aggressive behavior problems that has traditionally been delivered in small group formats. Because of concerns about iatrogenic effects secondary to aggregation of high risk youth, the current study examined whether genetic risk may moderate intervention outcome when youth were randomly assigned to group versus individual formats of an intervention. The oxytocin receptor gene (OXTR) has been associated with social behavior and may influence susceptibility to social reinforcement in general and deviant peer influence in particular. One variant of OXTR (rs2268493) was examined in 197 fourth-grade African-American children (64% male) who were randomly assigned to Group Coping Power (GCP) or Individual Coping Power (ICP) (Lochman et al., 2015). Longitudinal assessments of teacher- and parent-reported behavior were collected through a one-year follow-up. Growth curve analyses revealed a genotype by delivery format interaction. Youth with the A/A genotype demonstrated reductions in externalizing problems over the course of the intervention regardless of intervention format. In contrast, carriers of the G allele receiving the group-based intervention showed little improvement during the intervention and a worsening of symptoms during the follow-up year, while those receiving the individual format demonstrated reductions in externalizing problems. Given the associations between this OXTR variant and social bonding, carriers of the G allele may be more sensitive to social rewards from deviant peers in the group setting. This study suggests that genetic factors may be useful in predicting which type of intervention will be most effective for a particular individual.
Objective: Studies investigating neurocognitive deficits in youth with Conduct Disorder (CD) and ... more Objective: Studies investigating neurocognitive deficits in youth with Conduct Disorder (CD) and attention deficit hyperactivity disorder (ADHD) are often confounded by the high rates of comorbidity between the two. Method: Neurocognitive functioning was examined in three diagnostic groups (ADHD only, CD only, comorbid ADHD and CD) matched by age, sex, IQ, and medication status (n = 28-32 per group). Results: No significant differences emerged between the diagnostic groups on measures of risk-taking or response inhibition. Children with CD performed better on a measure of spatial planning than those with comorbid ADHD and CD, and dimensional analyses in the full sample (n = 265) revealed a small association between ADHD symptoms and poorer spatial planning. Conclusion: These results suggest that deficits in spatial planning may be more pronounced in individuals with ADHD, but that the neurocognitive functioning of youth with noncomorbid and comorbid CD and ADHD are largely similar.
Lying is one of the characteristic features of psychopathy, and has been recognized in clinical a... more Lying is one of the characteristic features of psychopathy, and has been recognized in clinical and diagnostic descriptions of the disorder, yet individuals with psychopathic traits have been found to have reduced neural activity in many of the brain regions that are important for lying. In this study, we examine brain activity in sixteen individuals with varying degrees of psychopathic traits during a task in which they are instructed to falsify information or tell the truth about autobiographical and non-autobiographical facts, some of which was related to criminal behavior. We found that psychopathic traits were primarily associated with increased activity in the anterior cingulate, various regions of the prefrontal cortex, insula, angular gyrus, and the inferior parietal lobe when participants falsified information of any type. Associations tended to be stronger when participants falsified information about criminal behaviors. Although this study was conducted in a small sample of individuals and the task used has limited ecological validity, these findings support a growing body of literature suggesting that in some contexts, individuals with higher levels of psychopathic traits may demonstrate heightened levels of brain activity.
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