Psychopathy Checklist-Revised Scores Research Articles

Neural correlates of moral and non-moral emotion in female psychopathy.

This study presents the first neuroimaging investigation of female psychopathy in an incarcerated population. Prior studies have found that male psychopathy is associated with reduced limbic and paralimbic activation when processing emotional stimuli and making moral judgments. The goal of this study was to investigate whether these findings extend to female psychopathy. During fMRI scanning, 157 incarcerated and 46 non-incarcerated female participants viewed unpleasant pictures, half which depicted moral transgressions, and neutral pictures. Participants rated each picture on moral transgression severity. Psychopathy was assessed using the Psychopathy Checklist-Revised (PCL-R) in all incarcerated participants. Non-incarcerated participants were included as a control group to derive brain regions of interest associated with viewing unpleasant vs. neutral pictures (emotion contrast), and unpleasant pictures depicting moral transgressions vs. unpleasant pictures without moral transgressions (moral contrast). Regression analyses in the incarcerated group examined the association between PCL-R scores and brain activation in the emotion and moral contrasts. Results of the emotion contrast revealed a negative correlation between PCL-R scores and activation in the right amygdala and rostral anterior cingulate. Results of the moral contrast revealed a negative correlation between PCL-R scores and activation in the right temporo-parietal junction. These results indicate that female psychopathy, like male psychopathy, is characterized by reduced limbic activation during emotion processing. In contrast, reduced temporo-parietal activation to moral transgressions has been less observed in male psychopathy. These results extend prior findings in male psychopathy to female psychopathy, and reveal aberrant neural responses to morally-salient stimuli that may be unique to female psychopathy.

Field reliability of the Psychopathy Checklist-Revised among life sentenced prisoners in Sweden.

Although typically described as reliable and valid, the Psychopathy Checklist-Revised (PCL-R) has come under some criticism by researchers in the last half-decade due to evidence of poor interrater reliability and adversarial allegiance being reported in applied settings in North America. This study examines the field reliability of the PCL-R using a naturalistic test-retest design among a sample of Swedish life sentenced prisoners (N = 27) who had repeatedly been assessed as part of their application to receive a reduced prison term. The prisoners, who were assessed by a team of forensic evaluators retained by an independent government authority, had spent on average 14 years in prison with a mean time from Assessment 1 to Assessment 2 of 2.33 years. The overall reliability of the PCL-R (ICC(A1)) was .70 for the total score and .62 and .76 for Factor 1 and 2 scores, respectively. Facet 1-3 scores ranged from .54 to .60, whereas Facet 4 was much higher (.90). Reliability of individual items was quite variable, ranging from .23 to .80. In terms of potential causes of unreliability, both high and low PCL-R scores at the initial assessment tended to regress toward the mean at the time of the second evaluation. Our results are in line with previous research demonstrating concerns regarding the reliability of the PCL-R within judicial settings, even among independent evaluation teams not retained by a particular side in a case. Collectively, these findings question whether the interpersonal (Facet 1) and affective (Facet 2) features tapped by the PCL-R are reliable enough to justify their use in legal proceedings.

Psychopathic traits in young offenders vs. non-offenders in similar socioeconomic condition

To analyze the differences in psychopathic traits between offender and non-offender youths with similar socioeconomic backgrounds. The Psychopathy Checklist Revised (PCL-R) scale was used to identify whether 39 young offenders with no history of mental disorders or criteria for psychopathy exhibited differences in its total score, and specifically for factor 1 or factor 2 of this scale, when compared with 32 other young people, living in similar socioeconomic conditions, who had not committed offenses. We observed statistically significant between-group differences (p < 0.01) in mean PCL-R scores, with a mean score of 13.4 in the offender group vs. 2.1 in the non-offender group. We also detected significant between-group differences when we analyzed mean factor 1 (p < 0.01) and factor 2 (p < 0.01) scores separately. Although the groups exhibited statistically significant difference in educational attainment, between-group comparison of mean PCL-R scores controlling for educational attainment by analysis of covariance (ANCOVA) showed that the difference in PCL-R scores remained statistically significant (p < 0.01). We conclude that, in this sample, the presence of both primary (interpersonal/affective characteristics) and secondary (lifestyle/antisocial behavior) psychopathic traits differed between offender and non-offender youths, even when excluding psychopathy and other mental disorders from the assessments. These results suggest a need for wide-ranging interventions, not restricted to socioeconomic aspects, for the management of juvenile delinquency.

The startle paradigm in a forensic psychiatric setting: Elucidating psychopathy

Most people who meet the diagnostic criteria for anti-social personality disorder (ASPD) do not meet the criteria for psychopathy. A differentiating feature is affective-interpersonal style. Eye blink startle reflex paradigms have been used to study affect. The aim of this study is to explore an eye blink startle paradigm as a means of distinguishing between men with both ASPD and psychopathy, and men with ASPD alone. One hundred and thirty-six men were recruited as follows: 31 patients with ASPD and a Psychopathy Checklist-Revised (PCL-R) score of 26 or more, 22 patients with ASPD and a PCL-R score of 25 or less, 50 forensic hospital employees and 33 general population men, none in the latter two groups having abnormal personality traits. Each was presented with 16 pleasant, 16 unpleasant and 16 neutral pictures. Acoustic probes were presented during each category at 300, 800, 1300 and 3800 milliseconds (ms) after picture onset. Eye blink response was measured by electromyography. Overall, both patient groups showed significantly smaller eye blink responses to the startle stimuli compared with the community controls. Both the latter and the ASPD group showed the expected increase in eye blink response at longer startle latencies to unpleasant pictures than pleasant pictures, but this was not present either in the group with psychopathy or in the forensic hospital employees. With increasing startle latency onset, eye blink amplitude increased significantly in both the healthy comparison groups and the ASPD group, but not in the group with psychopathy. We replicated eye blink startle modulation deficiencies among men with psychopathy. We confirmed that the psychopathy and ASPD groups could be distinguished by startle stimulus onset asynchrony, but this pattern was also seen in one healthy group - the forensic hospital employees. This suggests a case for more research with more diverse comparison groups and more differentiation of personality traits before drawing definitive conclusions about distinctive startle response patterns among men with psychopathy.

The role and reliability of the Psychopathy Checklist—Revised in U.S. sexually violent predator evaluations: A case law survey.

The civil commitment of offenders as sexually violent predators (SVPs) is a highly contentious area of U.S. mental health law. The Psychopathy Checklist-Revised (PCL-R) is frequently used in mental health evaluations in these cases to aid legal decision making. Although generally perceived to be a useful assessment tool in applied settings, recent research has raised questions about the reliability of PCL-R scores in SVP cases. In this report, we review the use of the PCL-R in SVP trials identified as part of a larger project investigating its role in U.S. case law. After presenting data on how the PCL-R is used in SVP cases, we examine the reliability of scores reported in these cases. We located 214 cases involving the PCL-R, 88 of which included an actual score and 29 of which included multiple scores. In the 29 cases with multiple scores, the intraclass correlation coefficient for a single evaluator for the PCL-R scores was only .58, and only 41.4% of the difference scores were within 1 standard error of measurement unit. The average score reported by prosecution experts was significantly higher than the average score reported by defense-retained experts, and prosecution experts reported PCL-R scores of 30 or above in nearly 50% of the cases, compared with less than 10% of the cases for defense witnesses (κ = .29). In conjunction with other recently published findings demonstrating the unreliability of PCL-R scores in applied settings, our results raise questions as to whether this instrument should be admitted into SVP proceedings.

Childhood Maltreatment and Aggressive Behaviour in Violent Offenders with Psychopathy

Objective: To document experiences of childhood maltreatment among violent offenders with antisocial personality disorder (ASPD) distinguishing between those with and without the syndrome of psychopathy (+P and -P), and to determine whether maltreatment is associated with proactive and reactive aggression. Method: The sample included 10 violent offenders with ASPD+P, 15 violent offenders with ASPD+P, and 15 nonoffenders. All participants completed interviews with the same forensic psychiatrist focusing on physical, sexual, and emotional abuse prior to age 18 using the Early Trauma Inventory. Aggression was assessed using the Reactive-Proactive Questionnaire. Results: Violent offenders with ASPD+P reported significantly more severe childhood physical abuse, but not more sexual or emotional abuse, than violent offenders with ASPD-P and nonoffenders. Psychopathy Checklist'Revised (PCL-R) scores, but not childhood physical abuse, were associated with proactive aggression. Childhood physical abuse was associated with reactive aggression, as was an interaction term indicating that when both PCL-R scores and childhood physical abuse were high, so was reactive aggression. Conclusions: Among violent offenders, PCL-R scores were positively associated with proactive aggression, while experiences of childhood maltreatment were not. This finding concurs with previous studies of children and adults and suggests that proactive aggression may be a behavioural marker of psychopathic traits. By contrast, childhood physical abuse was associated with reactive aggression, even among violent offenders with high PCL-R scores. This latter finding suggests a strong influence of childhood physical abuse on the development of reactive aggression that persists over the lifespan.

Childhood Maltreatment and Aggressive Behaviour in Violent Offenders with Psychopathy

To document experiences of childhood maltreatment among violent offenders with antisocial personality disorder (ASPD) distinguishing between those with and without the syndrome of psychopathy (+P and -P), and to determine whether maltreatment is associated with proactive and reactive aggression. The sample included 10 violent offenders with ASPD+P, 15 violent offenders with ASPD-P, and 15 non offenders. All participants completed interviews with the same forensic psychiatrist focusing on physical, sexual, and emotional abuse prior to age 18 using the Early Trauma Inventory. Aggression was assessed using the Reactive-Proactive Questionnaire. Violent offenders with ASPD+P reported significantly more severe childhood physical abuse, but not more sexual or emotional abuse, than violent offenders with ASPD-P and non offenders. Psychopathy Checklist-Revised (PCL-R) scores, but not childhood physical abuse, were associated with proactive aggression. Childhood physical abuse was associated with reactive aggression, as was an interaction term indicating that when both PCL-R scores and childhood physical abuse were high, so was reactive aggression. Among violent offenders, PCL-R scores were positively associated with proactive aggression, while experiences of childhood maltreatment were not. This finding concurs with previous studies of children and adults and suggests that proactive aggression may be a behavioural marker of psychopathic traits. By contrast, childhood physical abuse was associated with reactive aggression, even among violent offenders with high PCL-R scores. This latter finding suggests a strong influence of childhood physical abuse on the development of reactive aggression that persists over the lifespan.

Intelligence and psychopathy: a correlational study on insane female offenders

The occurrence of a significant relationship between psychopathic traits and intelligence is still open to debate. Most of the relevant information has been obtained from crystallized IQ tests or on psychopathic male offenders. In this study we hypothesized a negative correlation between psychopathic traits and fluid intelligence on a sample of criminal female in-patients. We carried out a correlational study on a selected sample of 56 criminal female offenders. Variables that were measured include the Hare Psychopathy Checklist Revised (PCL-R) total score (and, separately, the scores from its four subscales: Interpersonal, Affective, Lifestyle and Antisocial) and fluid IQ measured by Raven's Progressive Matrices (RPM). Pearson's correlation between RPM IQ and total PCL-R score was negative (r(54) = -0.55, p < 0.001); women with greater psychopathy traits (total PCL-R score) had lower IQ scores. Negative correlations were also found between IQ and the four PCL-R subscales, Interpersonal, Affective, Lifestyle and Antisocial (r(54) = -0.35, p < 0.01, r(54) = -0.52, p < 0.001, r(54) = -0.53, p < 0.001, and r(54) = -0.49, p < 0.001 respectively). The results indicate a general negative relationship between PCL-R and IQ, equally distributed across the four subcomponents of the psychopathic trait, and support the view that unsuccessful psychopathic women have poor planning and are unable to foresee and represent future consequences of their actions.

Early Traumatic Events in Psychopaths

The relationship between diverse early traumatic events and psychopathy was studied in 194 male inmates. Criminal history transcripts were revised, and clinical interviews were conducted to determine the level of psychopathy using the Psychopathy Checklist-Revised (PCL-R) Form, and the Early Trauma Inventory was applied to assess the incidence of abuse before 18 years of age. Psychopathic inmates presented a higher victimization level and were more exposed to certain types of intended abuse than sociopathic inmates, while the sum of events and emotional abuse were associated with the PCL-R score. Our studies support the influence of early adverse events in the development of psychopathic offenders.

Psychopathy and the combination of psychopathy and sexual deviance as predictors of sexual recidivism: Meta-analytic findings using the Psychopathy Checklist—Revised.

Clinicians routinely administer Hare's (2003) Psychopathy Checklist-Revised (PCL-R) to sex offenders and report PCL-R scores as meaningful predictors of recidivism risk. Although a 2005 meta-analysis reported a small (d=0.29) association between PCL-R scores and sexual recidivism (Hanson & Morton-Bourgon, 2005), no meta-analysis has examined effects for PCL-R factors and facets, the widely cited combination of high PCL-R and high sexual deviance scores, or potential moderators of the PCL-R/recidivism relation. We conducted a meta-analysis of effects from all available studies examining the relation between PCL-R scores and sexual recidivism (k=20, N=5,239). The effect for PCL-R Total scores predicting sexual recidivism was d=0.40, which falls beyond the upper end of the 2005 confidence interval [.20, .38]. Effects were stronger for Factor 2 (d=0.44) and Facet 4 (d=0.40) scores than other factor or facet scores (ds=0.01 to 0.17). Effects tended to be stronger for scores calculated for research (d=0.44) compared to those calculated for clinical use (d=0.28). Offenders who scored high on both the PCL-R and a measure of sexual deviance were more likely to reoffend sexually than other offenders (odds ratio=2.80 to 3.21, k=6). Results indicate that PCL-R scores, particularly combined with a measure of sexual deviance, are potentially relevant to sex offender risk. But results also underscore several practical challenges to implementing these findings in routine clinical practice.

Neuropsychological profiles of members of organized crime and drug-traffic organizations

Neuropsychological profiles of members of organized crime and drug-traffic organizations Feggy Ostrosky, Karina Cecilia Borja, C&eacute;sar Romero Rebollar, Karla Ximena D&iacute;az Galv&aacute;nLaboratory of Neuropsychology and Psychophysiology, National Autonomous University of Mexico, Mexico City, MexicoAbstract: Members of organized crime and drug traffic organization have developed a hierarchical model of association while participating in the production, distribution, and commercialization of drugs and defense of their territory. The nature of these organizations leads to extremely violent acts, similar to those performed by psychopathic delinquents. Eighty-two incarcerated male offenders &ndash; members of these organizations &ndash; were assessed and later classified according to the role they played in the organization: kingpins, money launderers, protectors, enforcers, and distributors/producers. These individuals were paired to a control group of 76 nonincarcerated healthy male volunteers from a community sample. We obtained their psychopathic profile and frontal lobe functioning using the Psychopathy Checklist, Revised (PCL-R), PCL-R score, and the Frontal Lobe and Executive Functions Battery. Kingpins and enforcers were considered as psychopaths across the entire range, while the money launderers fit in the description of successful psychopathy, and interesting contrasts were observed within the groups in the PCL-R factors. The orbitofrontal cortex was the functional area affected in the inmate sample, being more detrimentally affected in the most violent samples, thus providing a useful measure of psychopathy and violence of unimpaired criminals. An objective classification of incarcerated criminals will allow us to distinguish between neuronal and cultural psychopaths and sociopaths, which will help us establish adequate readaptation programs. Social issues were also determinants: it was found that in the environment where these criminals grew up, there is a broad acceptance and validation of lifestyles characterized by the accumulation and showing off of material values over intellectual and social values, which in addition to drug consumption trigger the development of aggressive and violent personalities. Readaptation programs must strengthen cognitive abilities, which are normally diminished in these individuals, and encourage a lifestyle with an &ldquo;integral wealth perspective&rdquo; that values not only economic but also personal, social, familial, labor, and cultural assets.Keywords: psychopathy, violence, executive functions, orbitofrontal regions

Field validity of the Psychopathy Checklist–Revised in sex offender risk assessment.

Several studies have concluded that scores from Hare's (2003) Psychopathy Checklist-Revised (PCL-R) predict reoffense among sexual offenders, but most of those studies examined the predictive validity of scores from trained research staff, not clinicians in the field scoring the measure as part of actual forensic assessments. Therefore, we examined the field validity of PCL-R scores that forensic evaluators assigned to 333 male sexual offenders who underwent evaluations during a civil commitment selection process. Overall, no PCL-R score was a significant predictor of sexually violent recidivism. Facet 4 was the only PCL-R score with an area under the curve (AUC) greater than .50 (AUC = .53, p = .85) and the only PCL-R score that approached statistical significance for predicting the combined category of violent or sexually violent offending (AUC = .63, p = .08). However, scores from a subset of evaluators revealed stronger predictive effects, indicating that predictive validity was higher for scores from some evaluators than others. Overall, these results suggest that the stronger predictive validity values in controlled research studies may not apply to all evaluators when the PCL-R is administered in the field.

Psychopathic traits and change on indicators of dynamic risk factors during inpatient forensic psychiatric treatment

The main objective of the present study was to investigate the impact of treatment on forensic psychiatric inpatients, examining changes on 22 indicators of five dynamic risk factors for violence (i.e., egocentrism, hostility, impulsivity, lack of insight, and negative distrustful attitudes), and to relate these potential changes to level of psychopathy assessed with the Hare Psychopathy Checklist — Revised (PCL-R). Also, we studied the relationship between psychopathy and treatment compliance, as indicated by the attendance rate of therapeutic activities. Eighty-seven male patients (due to missing data on at least one measure, sample size varies from 58 to 87; 42 patients have complete datasets) were administered a standardized psychological assessment battery (self-report inventories, performance-based personality test, observer ratings) upon admission (T1) and after on average 20months of treatment (T2). Upon admission, psychopathy (median split, PCL-R score≥22) was significantly related to a higher score on five of the 22 indicators of dynamic risk. The analyses showed no significant differences between psychopathic and non-psychopathic patients on the indicators of dynamic risk factors during 20months of inpatient forensic psychiatric treatment. However, psychopaths showed the expected pattern of treatment noncompliance, compared to non-psychopaths. The clinical and research implications of these findings are discussed.

Intrinsic limbic and paralimbic networks are associated with criminal psychopathy

Psychopathy is a personality disorder associated with impairments in decision-making, empathy, and impulsivity. Recent brain imaging studies suggest that psychopathy is associated with abnormalities in limbic/paralimbic brain regions. To date, no studies have examined functional brain connectivity measures using independent component analyses (ICA) in adults with psychopathy. Here, we test hypotheses regarding paralimbic connectivity in adult incarcerated individuals stratified by psychopathy scores. One hundred and two prison inmates were rated using the Hare Psychopathy Checklist-Revised (PCL-R). FMRI data were collected while subjects performed an auditory target detection "oddball" task. FMRI data were analyzed using group ICA to identify functional networks responding to the oddball task correlating with psychopathy scores. Components demonstrating significant correlations with psychopathy included a default mode network, a frontoparietal component, and a visual/posterior cingulate component. Modulation trends correlated strongly with factor 2 (impulsivity) and total PCL-R scores in the frontoparietal and visual/posterior cingulate networks, and with factor 1 (affective) scores within the default mode network. The posterior cingulate region factored significantly in the modulation trends observed. Consistent with the hypothesis of limbic/paralimbic abnormalities associated with psychopathy, modulation trends correlated strongly with PCL-R scores. There is strong evidence to implicate the posterior cingulate in aberrant functional connectivity associated with the manifestation of psychopathic symptoms. Future investigations comparing functional trends associated with the posterior cingulate in psychopathic subjects may provide further insight into the manifestation of this disorder.

The prognostic value of the PCL-R in relation to the SUD treatment ending

Scientific research about patients with substance use disorders (SUD) treated within the context of forensic compulsory addiction treatment is seldom available. Scientifically supported surveys regarding the treatability of SUD patients are rare. Some authors claim that the Psychopathy-Checklist—Revised (PCL-R) has value for predicting therapeutic success. PCL-R scores rely on extensive interview data and a detailed review of criminal records and social history. The scores reflect 1) the affective and interpersonal psychological traits; and 2) socially deviant conduct.This study was conducted by the forensic professional clinic at the hospital for Psychiatry and Neurology Hildburghausen. We assessed 102 male patients using the PCL-R. This investigation evaluated the Total score of the PCL-R and the score of Factor 1 and Factor 2 in relation to the end of treatment by court order. The results showed significant differences between patients who completed treatment and those who did not. Patients that dropped out of treatment had a higher score in PCL-R. With the use of the PCL-R it is possible to make a quantitative statement about which patients will complete treatment.

Psychopathy and lifetime experiences of depression

Previous studies have investigated an association between psychopathy and depression as part of the broader study of co-morbidity between psychopathy and Axis I psychopathology or as part of validity tests for psychopathy. These study methods have, however, been limited, for example, by exclusive use of questionnaires, or categorical measures of depression, and by low base rates of psychopathology. Our aims were to extend previous research on psychopathy and depression and to test the hypothesis that total Psychopathy Checklist - Revised (PCL-R) scores, and the four facets of interpersonal, affective, lifestyle and anti-social behaviour, would be negatively associated with depressive symptom scores. Dimensional measures of psychopathy and lifetime major depression were derived from structured interviews (the PCL-R and the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Third Edition, Revised) with adult male prisoners. The emotional experience of depression was also studied through analysis of the narratives used by the men to describe their depressive symptoms. The PCL-R scores, and in particular the interpersonal, affective and lifestyle facets of the PCL-R, were inversely associated with depression scores. Our findings suggest that psychopathy does influence the way depression is experienced.

Temperament and character as a function of psychopathy: relationships between the Psychopathy Checklist – Revised and the Temperament and Character Inventory in a sample of personality disordered serious or repeat offenders

The relationship between the concepts of Psychopathy (as conceptualised by a four-facet model of the Psychopathy Checklist – PCL-R; Hare, R.D. (2003). The Hare Psychopathy Checklist – Revised (PCL-R) (2nd ed.). Toronto: Multi-Health Systems) and the biopsychosocial model of normal personality (the Temperament and Character Inventory, – TCI; Cloninger, C.R., Przybeck, T.R., Svrakic, D.M., & Wetzel, R.D. (1994). The temperament and character inventory (TCI): A guide to its development and use. Washington University, St Louis, MI: Centre for Psychobiology of Personality) was explored in a sample (N = 121) of personality disordered, serious and repeat offenders. High total PCL-R scores were associated with high Novelty Seeking and low Harm Avoidance alongside the characteristic of low cooperativeness. At a facet level, Facet 1 (Interpersonal) was associated with low Harm Avoidance, Facet 2 (Affective) with low Reward Dependence and Facets 3 (Lifestyle) and 4 (Antisocial), with both high Novelty Seeking and low Co-operativeness. The results show that the different facets of psychopathy are related to different personality constructs as defined by the biopsychosocial model, which in turn may suggest different treatment and management regimes.

Psychopathy and gender differences in childhood psychosocial characteristics in homicide offenders – a nationwide register-based study

Research on childhood psychosocial characteristics with regard to psychopathy in homicide offenders is lacking. The current study focused on gender differences in the association of childhood victimisation, adverse family factors and parental characteristics, and psychopathy. Forensic psychiatric examination reports of all female offenders (n = 102), subjected to forensic examination and convicted of homicide in 1993–2005 and corresponding male offenders (n = 463) in 1995–2004 were retrospectively analysed and assessed for childhood psychosocial characteristics and psychopathy using The Hare Psychopathy Checklist-Revised (PCL-R). The findings indicated that adverse childhood psychosocial characteristics increase the risk of psychopathy in both female and male homicide offenders. Although significant gender differences in relation to the total PCL-R scores were found only in childhood sexual abuse, differences emerged in the four factors. In conclusion, traumatic experiences are related to psychopathy in both female and male offenders and the association may, contrary to prior research, be even stronger in female than in male homicide offenders.

Sexual sadism, psychopathy, and recidivism in juvenile sexual murderers

AbstractJuvenile sexual homicide is rare, occurring just 10–15 times a year in the United States. No study addressing how convicted juvenile sexual murderers adjust upon reentering the community exists. A safety concern, given this research gap, is the social movement afoot to abolish life sentences for juvenile offenders. If successful, then more of these offenders will be released back into society. This descriptive study examined: (1) the clinical findings and legal outcomes of 22 sexually homicidal juveniles following arrest; and (2) the relationship between post‐incarceration community adjustment and the variables of sexual sadism and psychopathy. All 22 offenders were tried in adult court—59% received one or more life sentences. Conduct disorder, personality disorders, sexual sadism, and psychopathic traits were prevalent. Mean intelligence quotient was 103. Follow‐up community recidivism data was available for 11 cases: five (45%) remained free of further convictions for an average of 8.9 years, whereas six (55%) recidivated 4.4 years later on average. Recidivators had higher Hare Psychopathy Checklist‐Revised scores. Three of the six recidivators survived an average of 5.3 years before committing additional sexually homicidal acts (all three had sexual sadism). Thus, 27% of the follow‐up group evolved into serial sexual murderers. The remaining three recidivators committed non‐sexual offences. These findings have relevance to criminal investigations, courtroom sentencing, and treatment strategies. Copyright © 2009 John Wiley &amp; Sons, Ltd.

Using the PCL-R to Help Estimate the Validity of Two Self-Report Measures of Psychopathy With Offenders

Two self-report measures of psychopathy, Levenson's Primary and Secondary Psychopathy scales (LPSP) and the Psychopathic Personality Inventory (PPI), were administered to a large sample of 1,603 offenders. The most widely researched measure of criminal psychopathy, the Hare Psychopathy Checklist-Revised (PCL-R), served as a provisional referent for estimating the construct validity of these self-report measures with offenders. Compared with the LPSP, the PPI displayed higher zero-order correlations with the PCL-R, better convergent and discriminant validity, and more consistent incremental utility in predicting PCL-R scores. Furthermore, using a variant of Westen and Rosenthal's approach to evaluating the construct validity of a new measure, compared with the LPSP, the PPI's pattern of associations with measures of 35 external criterion variables was more similar to the pattern observed for the PCL-R. Results generally provide stronger support for the validity of the PPI than the LPSP in offender populations using the PCL-R as a provisional benchmark, particularly for assessing interpersonal and affective features of psychopathy.