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The Psychopathy Checklist-Revised (PCL-R) is the most widely used measure of psychopathy in forensic clinical practice, but the generalizability of the measure to offenders with intellectual disabilities (ID) has not been clearly established. This study examined the structural equivalence and scalar equivalence of the PCL-R in a sample of 185 male offenders with ID in forensic mental health settings, as compared with a sample of 1,212 male prisoners without ID. Three models of the PCL-R's factor structure were evaluated with confirmatory factor analysis. The 3-factor hierarchical model of psychopathy was found to be a good fit to the ID PCL-R data, whereas neither the 4-factor model nor the traditional 2-factor model fitted. There were no cross-group differences in the factor structure, providing evidence of structural equivalence. However, item response theory analyses indicated metric differences in the ratings of psychopathy symptoms between the ID group and the comparison prisoner group. This finding has potential implications for the interpretation of PCL-R scores obtained with people with ID in forensic psychiatric settings. (Contains 6 notes, 2 tables, and 5 figures.)

Cross-national differences in the prevalence of psychopathy have been reported. This study examined whether rater effects could account for these differences. Psychopathy was assessed with the Psychopathy Checklist-Revised (PCL-R; R. D. Hare, 1991). Videotapes of 6 Scottish prisoners and 6 Canadian prisoners were rated by 10 Scottish and 10 Canadian raters. No significant main or interaction effects involving the nationality of raters were detected at the level of full scores or factor scores. Using a generalizability theory approach, it was demonstrated that the interrater reliability of total scores was good, that is, the proportion of variance in test scores attributable to raters was small. The interrater reliability of factor scores was lower, typically falling in the fair range. Overall, the results suggest that the reported cross-national differences are more likely to be in the expression of the disorder rather than in the eye of the beholder.

The Comprehensive Assessment of Psychopathic Personality Symptom Rating Scale (CAPP SRS) is a relatively new measure of psychopathic personality disorder (PPD) based on the CAPP concept map of psychopathy. To investigate the CAPP SRS, we identified the most plausible formal test structure for the test using the framework proposed by Slaney and Maraun, identified an appropriate quantitative characterization of that test structure, and then statistically evaluated it based on analysis of CAPP SRS data collected from a multisite sample of 314 adult male correctional offenders and secure hospital patients in Scotland and England. Overall, the CAPP SRS survived falsification when observed test data were compared to expectations based on the unidimensional monotone latent variable or UMLV model of Holland and Rosenbaum. CAPP SRS composite scores calculated consistent with the UMLV model had good measurement precision and good external validity with respect to scores on an established test of PPD. The findings provide provisional support for the test validity of the CAPP SRS and highlight the importance of theory-driven evaluations of test validity. [ABSTRACT FROM AUTHOR]

Psychopathic personality disorder (PPD) has important clinical and forensic implications. But much more effort has been devoted to assessing or diagnosing PPD than to explicating or defining it. In the first part of this paper, we describe the development of a conceptual model or “concept map” of PPD. Based on a systematic review of descriptions of PPD in the clinical and research literature, as well as consultation with subject matter experts, we identified key features of the disorder and translated them into 33 symptoms, presented as natural language (i.e., non-technical) trait descriptive adjectives or adjectival phrases. Each symptom in turn was defined by three synonymous adjectives or adjectival phrases. The 33 symptoms were grouped rationally to reflect six domains of personality functioning. In the second part of the paper, we discuss research completed and in progress intended to validate the CAPP conceptual model. [ABSTRACT FROM PUBLISHER]

The Comprehensive Assessment of Psychopathic Personality (CAPP; Cooke, Hart, Logan, & Michie, 2004) is a new personality-based model and clinical assessment of psychopathy. This study was the first to examine the content validity of the English-language CAPP. Content validation is a crucial part of the development and refinement of any new instrument. Prototypical analysis was used to evaluate the representativeness of CAPP symptoms to the psychopathy construct in adults. Symptoms were rated by international mental health professionals ( N = 132). Findings support good content validity of the CAPP, with most symptoms rated as highly representative of psychopathy. Domains relating to interpersonal style were particularly prototypical. Confirmatory factor analyses further suggested that CAPP domains are highly unidimensional. However, some CAPP symptoms may be weaker items in the model and further refinement is needed. [ABSTRACT FROM AUTHOR]

The RSVP is a set of structured professional judgment guidelines for assessing risk of sexual violence. We investigated the interrater reliability (IRR) of judgments made using the RSVP in a multidisciplinary forensic-clinical context. Raters were 28 forensic mental health and intellectual disability professionals with diverse training and experience. They used the RSVP to evaluate six case vignettes that varied with respect to offense characteristics, clinical complexity, and level of risk. The IRR of ratings for individual risk factors was generally fair. There was a good level of interrater reliability on Summary Judgments and Supervision Recommendations. Interrater reliability was highest when used by professionals who were highly trained in forensic risk assessment. On average, professionals with lower levels of specialist training agreed less with their colleagues and experts, and provided higher estimations of sexual violence risk. Lower levels of agreement were found in cases with moderate levels of complexity and risk. The RSVP can be used to make judgments of risk with adequate levels of interrater reliability. However, this is dependent on the training and expertise of professionals who use the tool. Methodological strengths and limitations are considered, followed by a discussion of implications for training, practice, and future research. [ABSTRACT FROM AUTHOR]

Instrumental and reactive subtypes of aggression are likely to have different biopsychosocial roots. This has implications for research aimed at identifying aetiological mechanisms and for forensic practice. In this methodological note we describe the development of a unidimensional measure of lifetime persistent instrumental aggression based on information collected from a random sample of 241 Scottish male prisoners. We applied modern psychometric methods - confirmatory factor analysis and item response theory methods - to the development of a short, reliable and informative measure of this important forensic construct. Results indicated that information from files and interviews could be combined to develop a unidimensional measure of the degree of instrumentality, which provided a psychometrically robust measure of the construct of instrumental aggression. Further, item response theory analyses indicated good measurement across the middle to high range of the trait. Identifying life-long patterns of instrumental aggressive behaviour, and distinguishing instrumental aggression from the broad pool of aggressive behaviour, has the potential to improve understanding of underlying mechanisms, increase the accuracy of risk assessments, and contribute to more effective treatment and management strategies. [ABSTRACT FROM AUTHOR]

Few cross-cultural studies have assessed psychopathy and none have included a sample from non-western countries. This study investigated the factor structure of the Psychopathy Checklist: Screening Version (PCL:SV) in an Iranian sample, and compared the results with a western sample. Three hundred fifty-one Iranian prisoners were compared with 405 participants of the standardization sample of the PCL:SV. Confirmatory factor analysis and item response theory method were used for data analysis. The Iranian data fitted well with the hierarchical three-factor model of psychopathy and neither two- nor four-factor models showed an adequate fit. Differential item functioning existed across samples, with discriminatory power of factor 1 (arrogant and deceitful interpersonal style) being lower in the Iranian sample that for factor 2 (deficient emotional experience) being greater in the Iranian sample than the standardization sample. Deficient emotional experience might be the most significant factor in diagnosing psychopathy, regardless of the studied culture. Other factors appear to be relatively culture-specific. [ABSTRACT FROM AUTHOR]

The article presents a comparison of prison suicide statistics between 1976 and 1994 in Scotland and a Poisson distribution. A rise in the number of suicide in Scottish prisons in 1994 have prompted the members of the Scottish Prison Service to conduct a review of its practice and policy at the organization level. The increase also affected the uniformed officer level as it reduced staff morale and increased staff anxiety. Assumptions of a failure in management have led to demands for changes in prison management. Before these changes be implemented, it is necessary to determine whether such increase have only occurred by chance. The number of suicides in Scottish prisons over the last 19 years are presented and analyzed.

A letter to the editor is presented in response to an article about evidence-based risk assessment.