Hare Psychopathy Checklist-Revised Research Articles

Field Inter-Rater Reliability of the Psychopathy Checklist-Revised.

Strong inter-rater reliability has been established for the Hare Psychopathy Checklist-Revised (PCL-R), specifically by examiners in research contexts. However, there is less support for inter-reliability in applied settings. This study examined archival data that included a sample of sex offenders ( n = 178) who entered federal custody between 1992 and 1998. The offenders were assessed using the PCL-R on two occasions. The first assessment occurred at Millhaven Institution, the intake unit for federally incarcerated offenders in the province of Ontario. The second assessment took place upon inmates' transfer to the Regional Treatment Center, which admits federal inmates with intense psychological and psychiatric needs. Intra-class correlation coefficients (ICCs) were calculated for item, total, factor, and facet scores. The ICC absolute agreement for the PCL-R total and factor scores from raters across both settings was slightly better than what has been previously reported by Hare. Results of this study show that the reliability of PCL-R scores in field settings can be comparable to those in research settings. Authors conclude by highlighting the importance of training, consultation, considering different scores for a given item, following the guidelines of the manual in addition to considering measures that enhance neutrality and reliability of findings in the criminal justice system.

Endogenous attention modulates early selective attention in psychopathy: An ERP investigation.

Psychopathic individuals are prone to act on urges without adequate consideration of future consequences or the rights of other individuals. One interpretation of this behavior is that it reflects abnormal selective attention (i.e., a failure to process information that is incongruent with their primary focus of attention; Hiatt, Schmitt, & Newman, Neuropsychology, 18, 50-59, 2004). Unfortunately, it is unclear whether this selective attention abnormality reflects top-down endogenous influences, such as the strength or specificity of attention focus (i.e., top-down set) apart from other, more exogenous (bottom-up), effects on attention. To explore this question, we used an early visual event-related potential (N2pc) in combination with a modified visual search task designed to assess the effect of early endogenous (i.e., top-down) attention on the processing of set-congruent information. The task was administered to a sample of 70 incarcerated adult males, who were assigned to high, intermediate, and low psychopathy groups using Hare's Psychopathy Checklist-Revised (Hare, 2003). Based on the assumption that their failure to process set-incongruent information reflects the exaggerated effects of endogenous attention, we predicted that participants with high psychopathy scores would show an exaggerated N2pc response to set-congruent information. The results supported the hypothesis and provide novel electrophysiological evidence that psychopathy is associated with exaggerated endogenous attention effects during early stages of processing. Further research is needed to examine the implications of this finding for the well-established failure of psychopathic individuals to process set-incongruent information and inhibit inappropriate responses.

Psychometric properties of the Hare Psychopathy Checklist-Revised (PCL-R) in a representative sample of Canadian federal offenders.

The Hare Psychopathy Checklist-Revised (PCL-R; Hare, 2003) is a commonly used psychological test for assessing traits of psychopathic personality disorder. Despite the abundance of research using the PCL-R, the vast majority of research used samples of convenience rather than systematic methods to minimize sampling bias and maximize the generalizability of findings. This potentially complicates the interpretation of test scores and research findings, including the "norms" for offenders from the United States and Canada included in the PCL-R manual. In the current study, we evaluated the psychometric properties of PCL-R scores for all male offenders admitted to a regional reception center of the Correctional Service of Canada during a 1-year period (n = 375). Because offenders were admitted for assessment prior to institutional classification, they comprise a sample that was heterogeneous with respect to correctional risks and needs yet representative of all offenders in that region of the service. We examined the distribution of PCL-R scores, classical test theory indices of its structural reliability, the factor structure of test items, and the external correlates of test scores. The findings were highly consistent with those typically reported in previous studies. We interpret these results as indicating it is unlikely any sampling limitations of past research using the PCL-R resulted in findings that were, overall, strongly biased or unrepresentative.

Error-related processing in adult males with elevated psychopathic traits.

Psychopathy is a serious personality disorder characterized by dysfunctional affective and behavioral symptoms. In incarcerated populations, elevated psychopathic traits have been linked to increased rates of violent recidivism. Cognitive processes related to error processing have been shown to differentiate individuals with high and low psychopathic traits and may contribute to poor decision making that increases the risk of recidivism. Error processing abnormalities related to psychopathy may be attributable to error-monitoring (error detection) or posterror processing (error evaluation). A recent 'bottleneck' theory predicts deficiencies in posterror processing in individuals with high psychopathic traits. In the current study, incarcerated males (n = 93) performed a Go/NoGo response inhibition task while event-related potentials (ERPs) were recorded. Classic time-domain windowed component and principal component analyses were used to measure error-monitoring (as measured with the error-related negativity [ERN/Ne]) and posterror processing (as measured with the error positivity [Pe]). Psychopathic traits were assessed using Hare's Psychopathy Checklist-Revised (PCL-R). PCL-R Total score, Factor 1 (interpersonal-affective traits), and Facet 3 (lifestyle traits) scores were positively related to posterror processes (i.e., increased Pe amplitude) but unrelated to error-monitoring processes (i.e., ERN/Ne). These results support the attentional bottleneck theory and further describe deficiencies related to elevated psychopathic traits that could be beneficial for new treatment strategies for psychopathy.

Metacognitive impairments in schizophrenia are arrested at extreme levels of psychopathy: The cut-off effect.

Psychopathy and metacognitive difficulties have been associated with the occurrence of violence in schizophrenia. However, evidence suggests that nonschizophrenic psychopaths match or even outperform healthy controls on tests of metacognition. We hypothesize that the metacognitive difficulties associated with schizophrenia may be ameliorated by comorbid psychopathy. To this end, metacognition (using the Metacognition Assessment Scale-Abbreviated [MAS-A]) and psychopathy (using the Hare Psychopathy Checklist-Revised [PCL-R]) are assessed in 79 patients with schizophrenia with a history of criminal offending. Piecewise regression reveals that the association between metacognition and psychopathy changes from a negative to a positive association at a breakpoint corresponding to a score of 24 on the PCL-R. This score is within the range of the cut-off point used for the diagnosis of psychopathy in Europe, which corresponds to a score of 26 on the PCL-R. The patients scoring above 24 on the PCL-R demonstrated better overall metacognitive abilities, suggesting that these patients constitute a specific group in which schizophrenia has an attenuated impairing effect on metacognition. However, this effect was absent for the Mastery subscale of the MAS-A, which refers to the ability to use one's own mental states to solve social and psychological dilemmas. Our results suggest that the relative preservation of metacognitive abilities in schizophrenic patients with extreme levels of psychopathy may contribute to their offending behavior as it may enable them to understand how to manipulate and extort their victims. However, enhancing the Mastery domain of metacognition in these patients may attenuate this offending behavior.

Can psychopathy be detected psychophysiologically?

The aim of the present study was to determine whether pupillometry was able to identify and differentiate psychopathic personality traits in criminally responsible mentally disordered offenders (§ 21/2 StGB). Psychopathic disorder has not only behavioral, but also psychophysiological correlates, which may be evaluated by pupillometry. This might make it possible to diagnose psychopathy by means of a non-invasive method and in a further step to adapt therapeutic measures accordingly. Psychopathic behavior and personality traits were identified by means of the Hare Psychopathy Checklist-Revised (PCL-R) and offenders were divided into 4 groups with PCL-R scores of 0-10, 11-20, 21-30 and 31-40, respectively. Pupillometry makes it possible to objectively measure amplitudes of pupillary oscillations, which may serve as an indicator of central nervous activation/deactivation. The study at hand showed that the higher the PCL-R values, the smaller the amplitudes. Thus, it can be concluded that central nervous activation decreases with higher PCL-R values and psychopathy is associated with central nervous deactivation.

Abuse in childhood and psychopathic traits in a sample of violent offenders.

A significant body of research underlines the link between the exposure to abuse in childhood and subsequent criminal behaviors. Research on the role played by childhood interpersonal trauma in the development of psychopathy, however, is still scant. The aim of this study was to explore the relationship between childhood experiences of abuse and psychopathic traits in a group of violent offenders from Italy. Seventy-eight inmates who were convicted of violent crimes participated in this study. Participants were administered the Traumatic Experience Checklist to assess childhood experiences of emotional, physical, and sexual abuse, and the Hare Psychopathy Checklist-Revised (PCL-R) to assess psychopathic traits. Almost two thirds of the participants reported either emotional, physical, or sexual abuse in childhood, with 17% having experienced all 3 types of abuse investigated in this study. Emotional abuse resulted in a positive predictor of PCL-R total scores and its Interpersonal-Affective and Lifestyle-Antisocial factors. This suggests that emotional abuse in childhood, in combination with neurobiological and temperamental vulnerabilities, can foster the development of psychopathic traits.

Predictive efficacy of violence risk assessment instruments in Latin-America

In Latin America, violence risk assessment used to be based in the non-structured clinical approach. An Argentinian cohort study that included violence risk assessment tools changed the tradition. The objective of this study is to inform of the observed predictive efficacy of these tools in the follow-up until March 2012. One hundred and fifty three consecutive pre-released convicted males were recruited from September 2001 through September 2004 in La Plata, Argentina. The pre-release assessment measures included the Hare Psychopathy Checklist-Revised, Assessing Risk for Violence V2, Structured Professional Judgment, and Violence Risk Appraisal Guide. The mean follow-up time was 1,290 days. Ninety-nine (64.7%) subjects had at least one general relapse, and 91 (59.5%) had at least one violent relapse. The incidence rate of violent recidivism was 16.8 per 100 person-years. While some indicators of predictive validity had no clinical significance, the time-dependent indicators did have clinical significance.

Dysfunctional error-related processing in female psychopathy.

Neurocognitive studies of psychopathy have predominantly focused on male samples. Studies have shown that female psychopaths exhibit similar affective deficits as their male counterparts, but results are less consistent across cognitive domains including response modulation. As such, there may be potential gender differences in error-related processing in psychopathic personality. Here we investigate response-locked event-related potential (ERP) components [the error-related negativity (ERN/Ne) related to early error-detection processes and the error-related positivity (Pe) involved in later post-error processing] in a sample of incarcerated adult female offenders (n = 121) who performed a response inhibition Go/NoGo task. Psychopathy was assessed using the Hare Psychopathy Checklist-Revised (PCL-R). The ERN/Ne and Pe were analyzed with classic windowed ERP components and principal component analysis (PCA). Consistent with previous research performed in psychopathic males, female psychopaths exhibited specific deficiencies in the neural correlates of post-error processing (as indexed by reduced Pe amplitude) but not in error monitoring (as indexed by intact ERN/Ne amplitude). Specifically, psychopathic traits reflecting interpersonal and affective dysfunction remained significant predictors of both time-domain and PCA measures reflecting reduced Pe mean amplitude. This is the first evidence to suggest that incarcerated female psychopaths exhibit similar dysfunctional post-error processing as male psychopaths.

A cluster analytic examination and external validation of psychopathic offender subtypes in a multisite sample of Canadian federal offenders.

The present study is a cluster analytic examination and validation of psychopathic offender subtypes from 4 combined samples of Canadian federally incarcerated offenders, most of whom were serving sentences for violent offenses. The men were rated on the Hare Psychopathy Checklist-Revised (PCL-R; Hare, 1991, 2003) on the basis of comprehensive file information and 314 cases were extracted using a PCL-R total cut score of 25. Cluster analysis of the 4 PCL-R facets converged at a 2-cluster solution: a primary subtype characterized by prominent interpersonal and affective features of psychopathy and a secondary subtype characterized by comparatively few interpersonal features and high scores on the remaining facets. Validation analyses found that the vast majority of primary psychopathic offenders (74.1%) were White or of non-Aboriginal descent in contrast to the secondary subtype (47.6%). Secondary psychopathic offenders tended to be actuarially higher risk, have greater criminogenic needs, and to make greater amounts of treatment change on criminogenic targets; however, contrary to expectations, within-treatment changes from a violence reduction program were significantly associated with reductions in violent recidivism for primary, but not secondary, variants. There were few differences in rates of recidivism between the groups overall; secondary variants had higher rates of sexual violence which was largely accounted for by individual differences in baseline static risk. Implications for risk assessment, treatment planning, and the classification and etiology of primary and secondary psychopathy are discussed.

Psychopathy, attention, and oddball target detection: New insights from PCL-R facet scores.

Psychopathy is a disorder accompanied by cognitive deficits including abnormalities in attention. Prior studies examining cognitive features of psychopaths using ERPs have produced some inconsistent results. We examined psychopathy-related differences in ERPs during an auditory oddball task in a sample of incarcerated adult males. We extend previous work by deriving ERPs with principal component analysis (PCA) and relate these to the four facets of Hare's Psychopathy Checklist Revised (PCL-R). Features of psychopathy were associated with increased target N1 amplitude (facets 1, 4), decreased target P3 amplitude (facet 1), and reduced slow wave amplitude for frequent standard stimuli (facets 1, 3, 4). We conclude that employing PCA and examining PCL-R facets improve sensitivity and help clarify previously reported associations. Furthermore, attenuated slow wave during standards may be a novel marker for psychopaths' abnormalities in attention.

Psychopathic traits among a consecutive sample of Finnish pretrial fire-setting offenders.

BackgroundPsychopathy, a severe disorder of personality, is well represented in the criminal and forensic psychiatric population and is significantly associated with increased risk of violence and crime. Fire-setting is a major source of property damage, injury, and death in many Western countries. The primary aim of this study was to evaluate psychopathic traits in a consecutive sample of Finnish male pretrial fire-setting offenders. Further, we wanted to investigate whether fire-setting recidivists show higher traits of psychopathy than one-time firesetters and whether exclusive firesetters show lower traits of psychopathy than those with criminal versatility.MethodsThe forensic psychiatric examination statements for male firesetters who underwent a pretrial forensic psychiatric evaluation during a 10-year period (1989 –1998) were reviewed. The sample comprised 129 firesetters with normal IQ, 41 of whom were fire-setting recidivists. Fifty men were exclusive firesetters. Assessment of psychopathy-like personality character was performed using the 20-item Hare Psychopathy Checklist-Revised.ResultsTwo individuals (1.6%, 95% Cl: 0.0-3.7) scored ≥30 points and 19 (14.7%, 95% Cl: 8.6-20.8) ≥ 25 points on the PCL-R. The mean PCL-R total score was 16.1 (SD 6.88), the mean Factor 1 score 5.0 (SD 3.41), and the mean Factor 2 score 9.9 (SD 3.86). No significant differences emerged between the recidivists and the one-time firesetters. The versatile firesetters exhibited significantly higher mean total and factor scores than the exclusive ones.ConclusionAmong firesetters, there is a subgroup of persons with significant psychopathic traits, which should be recognized in legal and health care organizations. Although psychopathy was associated with greater criminal versatility, it bore no relationship to fire-setting recidivism.

The Relationship Between Comorbid Psychiatric Illnesses and Psychopathy Levels On Male Individuals with Antisocial Personality Disorder in the Turkish Community

Introduction The studies investigating antisocial personality disorder are mostly applied to subjects in prison.) In the literature, it is shown that 50% – 75 % of the prisoners are diagnosed as ASPD, and only 15% -25% of the patients can be defined “psychopathic”. Comorbidity rates may change in different populations. Objective In this study, we aimed to investigate comorbid disorders in a Turkish patient sample with the diagnosis of antisocial personality disorder (ASPD) who are not in prison and we investigated its relationship with psychopathy levels. Methods 140 male subjects were included in the study. None of them had been in the prison on admission. They all had the diagnoses of ASPD according to DSM-IV (Diagnostic and Statistical Manual of Mental Disorders-IV) diagnostic criteria. Socio-demographic data form, Structured Clinical Interview for DSM- Axis 1 Disorders and Axis 2 Disorders (SCID-I, SCID-II), and Hare Psychopathy Checklist-Revised (PCL-R) were applied. Results Most commonly seen comorbid disorders were as follows: substance use disorders (66,9%), alcohol use disorders (65,4%) and adjustment disorders (36,4%). In the high psychopathy group 'Current and Lifetime Alcohol and Substance Use Disorder” and 'Generalized Anxiety Disorder” were detected significantly more than those of the low psychopathy group. Conclusion This study supplies important epidemiological data about ASPD comorbidity. Of note, none of the subjects were in the prison during the study. Psychopathy also seems like a predictor in comorbid situations.

The Mismeasure of Psychopathy: A Commentary on Boddy’s PM-MRV

Boddy and his colleagues have published several articles on “corporate psychopathy” using what they refer to as a Psychopathy Measure—Management Research Version (PM-MRV). They based this measure on the items that comprise the Interpersonal and Affective dimensions (Factor 1) of the Hare Psychopathy Checklist-Revised (PCL-R), a widely used copyrighted and controlled instrument. The PM-MRV not only misspecifies the construct of psychopathy, but also serves as an example of the problems associated with an attempt to form a “new” scale by adapting items from a proprietary scale. The PCL-R measures a superordinate construct underpinned by four correlated dimensions or first-order factors, not just the two in the PM-MRV. The other two dimensions are Lifestyle and Antisocial, which together form Factor 2 of the PCL-R. As defined by the PCL-R, psychopathy requires high scores on both Factor 1 and Factor 2. Lack of validity aside, even if the PM-MRV were to be a useful measure of Factor 1, it would not discriminate between psychopathy and other “dark personalities,” such as Machiavellianism and narcissism, which, along with psychopathy, form the Dark Triad. This lack of discrimination stems from the fact that each of these personalities shares features measured by Factor 1 and, by implication, by the PM-MRV. Research findings based on the PM-MRV may have some meaning with respect to dark personalities in general, but their relevance to psychopathy, as measured with the PCL-R, is tenuous at best.

(Mis)understanding Psychopathy: Consequences for Policy and Practice with Offenders

What is psychopathy? It is a term that is used casually, to refer to everyone from improbably skilled super-criminals to businessmen who succeed in making astronomical profits by staying more-or-less on the right side of the law, but on the wrong side of morality or ethics. It is a construct both complex and prosaic, about which there is significant scientific debate and confusion. This article gives an overview of the key definitional issues for psychopathy, and introduces a framework – the triarchic model – for organizing some the main components of psychopathy and for evaluating what psychopathy is, and what it is not. The second section outlines the measurement of psychopathy, noting in particular the strengths and limitations of The Hare Psychopathy Checklist and Hare Psychopathy Checklist–Revised, and their dominance of the measurement domain, before moving on to unpack the relationship between these scales and crime itself. Third, research is reviewed on whether psychopaths and psychopathy can change, before reaching several conclusions about the consequences of diagnostic confusion and misunderstanding for psychopathic people and those who work with them.

The Relationship between Co morbid Psychiatric Illnesses and Psychopathy Levels on Male Individuals with Antisocial Personality Disorder in the Turkish Community

Objective: The studies investigating antisocial personality disorder are mostly applied to subjects in prison. In this study, we aimed to investigate comorbid disorders in a Turkish patient sample with the diagnosis of antisocial personality disorder (ASPD) who are not in prison and we investigated its relationship with psychopathy levels. Method: 140 male subjects were included in the study. None of them had been in the prison on admission. They all had the diagnoses of ASPD according to DSM-IV (Diagnostic and Statistical Manual of Mental Disorders-IV) diagnostic criteria. Socio-demographic data form, Structured Clinical Interview for DSM- Axis 1 Disorders and Axis 2 Disorders (SCID-I, SCID-II), and Hare Psychopathy Checklist-Revised (PCL-R) were applied. Results: Most commonly seen comorbid disorders were as follows: substance use disorders (66,9%), alcohol use disorders (65,4%) and adjustment disorders (36,4%). In the high psychopathy group Current and Lifetime Alcohol and Substance Use Disorder and Generalized Anxiety Disorder were detected significantly more than those of the low psychopathy group. Conclusion: This study supplies important epidemiological data about ASPD comorbidity. Of note, none of the subjects were in the prison during the study. Psychopathy also seems like a predictor in comorbid situations.

A contrastive analysis of the factorial structure of the PCL-R: Which model fits best the data?

The aim of this study was to determine which of the factorial solutions proposed for the Hare Psychopathy Checklist-Revised (PCL-R) of two, three, four factors, and unidimensional fitted best the data. Two trained and experienced independent raters scored 197 prisoners from the Villabona Penitentiary (Asturias, Spain), age range 21 to 73 years (M = 36.0, SD = 9.7), of whom 60.12% were reoffenders and 73% had committed violent crimes. The results revealed that the two-factor correlational, three-factor hierarchical without testlets, four-factor correlational and hierarchical, and unidimensional models were a poor fit for the data (CFI ≤ .86), and the three-factor model with testlets was a reasonable fit for the data (CFI = .93). The scale resulting from the three-factor hierarchical model with testlets (13 items) classified psychopathy significantly higher than the original 20-item scale. The results are discussed in terms of their implications for theoretical models of psychopathy, decision-making, prison classification and intervention, and prevention.

Evaluator differences in Psychopathy Checklist-Revised factor and facet scores.

Recent research suggests that the reliability of some measures used in forensic assessments--such as Hare's (2003) Psychopathy Checklist-Revised (PCL-R)--tends to be weaker when applied in the field, as compared with formal research studies. Specifically, some of the score variability in the field is attributable to evaluators themselves, rather than the offenders they evaluate. We studied evaluator differences in PCL-R scoring among 558 offenders (14 evaluators) and found evidence of large evaluator differences in scoring for each PCL-R factor and facet, even after controlling for offenders' self-reported antisocial traits. There was less evidence of evaluator differences when we limited analyses to the 11 evaluators who reported having completed a PCL-R training workshop. Findings provide indirect but positive support for the benefits of PCL-R training, but also suggest that evaluator differences may be evident to some extent in many field settings, even among trained evaluators.

Psychopathic traits modulate brain responses to drug cues in incarcerated offenders

Recent neuroscientific evidence indicates that psychopathy is associated with abnormal function and structure in limbic and paralimbic areas. Psychopathy and substance use disorders are highly comorbid, but clinical experience suggests that psychopaths abuse drugs for different reasons than non-psychopaths, and that psychopaths do not typically experience withdrawal and craving upon becoming incarcerated. These neurobiological abnormalities may be related to psychopaths' different motivations for—and symptoms of—drug use. This study examined the modulatory effect of psychopathic traits on the neurobiological craving response to pictorial drug stimuli. Drug-related pictures and neutral pictures were presented and rated by participants while hemodynamic activity was monitored using functional magnetic resonance imaging. These data were collected at two correctional facilities in New Mexico using the Mind Research Network mobile magnetic resonance imaging system. The sample comprised 137 incarcerated adult males and females (93 females) with histories of substance dependence. The outcome of interest was the relation between psychopathy scores (using the Hare Psychopathy Checklist-Revised) and hemodynamic activity associated with viewing drug-related pictures vs. neutral pictures. There was a negative association between psychopathy scores and hemodynamic activity for viewing drug-related cues in the anterior cingulate, posterior cingulate, hippocampus, amygdala, caudate, globus pallidus, and parts of the prefrontal cortex. Psychopathic traits modulate the neurobiological craving response and suggest that individual differences are important for understanding and treating substance abuse.

Neural processing of dynamic emotional facial expressions in psychopaths

Facial expressions play a critical role in social interactions by eliciting rapid responses in the observer. Failure to perceive and experience a normal range and depth of emotion seriously impact interpersonal communication and relationships. As has been demonstrated across a number of domains, abnormal emotion processing in individuals with psychopathy plays a key role in their lack of empathy. However, the neuroimaging literature is unclear as to whether deficits are specific to particular emotions such as fear and perhaps sadness. Moreover, findings are inconsistent across studies. In the current experiment, 80 incarcerated adult males scoring high, medium, and low on the Hare Psychopathy Checklist-Revised (PCL-R) underwent functional magnetic resonance imaging (fMRI) scanning while viewing dynamic facial expressions of fear, sadness, happiness, and pain. Participants who scored high on the PCL-R showed a reduction in neuro-hemodynamic response to all four categories of facial expressions in the face processing network (inferior occipital gyrus, fusiform gyrus, and superior temporal sulcus (STS)) as well as the extended network (inferior frontal gyrus and orbitofrontal cortex (OFC)), which supports a pervasive deficit across emotion domains. Unexpectedly, the response in dorsal insula to fear, sadness, and pain was greater in psychopaths than non-psychopaths. Importantly, the orbitofrontal cortex and ventromedial prefrontal cortex (vmPFC), regions critically implicated in affective and motivated behaviors, were significantly less active in individuals with psychopathy during the perception of all four emotional expressions.