In defence of multidimensional scaling for the analysis of sexual offence behaviour: cautionary notes regarding analysis and interpretation

Abstract

Multidimensional scaling (MDS) has become a popular form of statistical analysis in the field of psychology and law. A recent paper in this journal by Sturidsson and colleagues (12, 221–230, 2006) used MDS to replicate an earlier study of sexual offence behaviour by Canter and Heritage (Journal of Forensic Psychiatry, 1, 185–212, 1990). They concluded that the model was not replicable and cast grave doubts on the applicability of MDS for the analysis of sexual offences. In this paper I argue that neither conclusion is correct. Initial difficulties in interpretation of the MDS results were clearly due to errors in calculation that should have been recognised. Indeed, a frequency analysis of Sturidsson and colleagues’ variables indicated that their results were in fact remarkably congruent with those of Canter and Heritage. It is concluded that statistical software should not obviate the need for a working knowledge of the statistics being computed.     

A re-examination of female child molesters’ implicit theories: evidence of female specificity?

Recent research by Beech, Parrett, Ward, and Fisher has suggested that Ward and Keenan's male-derived implicit theories represent a good theoretical fit for explaining female child molesters’ offence-supportive cognitions. This paper re-examines the applicability of Ward and Keenan's (1999) male-derived implicit theories for explaining the self-reported offence-supportive cognitions of 16 UK female child molesters. Using almost identical analytic methods to Beech et al., we show that it is indeed possible to code female child molesters’ offence-supportive cognitions under each of the five male-derived implicit theories proposed by Ward and Keenan. However, our results show that the content of female child molesters’ offence-supportive cognitions appears very different to that of male child molesters. Based on our findings, we discuss relevant treatment implications and offer a re-conceptualization of implicit theories for female child molesters using the sex-role stereotyping literature. We also propose that – unlike male child molesters – female child molesters are unlikely to hold generalized implicit theories that sexualize children.     

An analysis of police officers' decisions about whether to refer cases of child abuse for prosecution

Facial composite research has mainly focused on their investigative value. No. comparable attention was drawn to their probative value – the extent to which a composite image may serve as incriminating or exonerating evidence against a defendant. The existing data resulting from mock-juror research allow only cautious conclusions and applies solely to the common law system. Therefore an experiment was conducted involving laypeople (N = 74) and prosecutor apprentices (N = 72). All participants received case materials of a robbery committed by a young male, including the victim's and defendant's testimonies and other evidence. In both samples, the facial composite evidence was manipulated so that participants viewed a composite image that was either a good or a poor match to the defendant. A facial composite that bore a strong resemblance to the defendant influenced the assessment of the eyewitness' credibility in the apprentices sample, but failed to affect other dependent variables. Surprisingly, laypeople ignored the facial composite no matter how well it resembled the defendant. Significant differences in the assessment of eyewitness' credibility, the strength of the defense case, the credibility of the defendant's alibi, and his culpability were found between the prosecutor apprentices and laypeople. The practical implications of these findings are discussed.     

A field evaluation of the VIPER system: a new technique for eliciting eyewitness identification evidence

Abstract

The main aim of the study was to investigate the rate of claimed false confession during police questioning and identify variables that best discriminate between false confessors and non-false confessors. The participants were 24 627 high school students in seven countries in Europe. Out of 2726 who had been interrogated by the police as a suspect, 375 (13.8%) claimed to have made false confessions to the police. Logistic regression analyses showed that for both boys and girls, having attended substance abuse therapy, been attacked and bullied, and having committed a burglary, significantly discriminated between the false confessor and non-false confessor. In addition for boys, having been sexually abused by an adult outside the family was the single best predictor. The study shows the importance of history of victimization and substance misuse among adolescents in relation to giving a false confession to police during interrogation.     

Sexual fantasies and sensation seeking among psychopathic sexual offenders

Abstract

This study investigated the relationship between psychopathy, sensation seeking behavior and sexual fantasies in a sample of 199 participants from a maximum security forensic hospital. Psychopathy, measured by the Psychopathy Checklist – Revised (PCL-R), and several sensation seeking and sexual fantasy measures were utilized. Results indicated that, in agreement with previous research, sexually deviant psychopaths are more likely to offend against adults than children. Likewise, psychopaths showed some tendency to score significantly higher on sexual sensation seeking measures than nonpsychopathic sexual offenders. Furthermore, a relationship between psychopathy and overall sexual fantasies existed but there were not specific patterns among psychopaths and nonpsychopaths with regard to specific categories of sexual fantasies.     

Remembering remotely: would video-mediation impair witnesses' memory reports?

Witnesses often experience lengthy delays prior to being interviewed, during which their memories inevitably decay. Video-communication technology – favored by intergovernmental organizations for playing larger roles in judicial processes – might circumvent some of the resourcing problems that can exacerbate such delays. However, whereas video-mediation might facilitate expeditious interviewing, it might also harm rapport-building, make witnesses uncomfortable, and thereby undermine the quality and detail of their reports. Participants viewed a crime film and were interviewed either one day later via video-link, one day later face-to-face, or 1–2 weeks later face-to-face. Video-mediation neither influenced the detail or the accuracy of participants' reports, nor their ratings of the quality of the interviews. However, participants who underwent video-mediated interviews after a short delay gave more accurate, detailed reports than participants who waited longer to be interviewed face-to-face. This study provides initial empirical evidence that video-mediated communication (VMC) could facilitate the expeditious conduct of high-quality investigative interviews.     

Simulations of child sexual abuse interviews using avatars paired with feedback improves interview quality

We tested whether simulated child sexual abuse (CSA) interviews with computer-generated child avatars could improve interview quality. Feedback was provided not only on question types, as in previous research, but also on whether the conclusions drawn by the interviewers were correct. Twenty-one psychology students (average age M = 24.5) interviewed four different avatars which had a simulated story of either abuse or non-abuse. The participants were randomly divided into two groups: one received feedback on question types and conclusions after each simulated interview and the other one did not receive any feedback. Avatars revealed pre-defined ‘memories’ as a function of algorithms formulated based on previous empirical research on children's suggestibility. The feedback group used more open-ended and fewer closed questions. They also made more correct conclusions and found more correct details in the last two interviews compared to the no-feedback group. Feedback on both the question types and conclusions in simulated CSA interviews with avatars can improve the quality of investigative interviews in only one hour. The implications for training practice were discussed.     

Assessing Public Managers' Change-Oriented Behavior: Are Private Managers Caught in the Doldrums?

This article presents a concept and a measurement of managers' change-oriented behavior related to the initiation and implementation organizational change. It is argued that managers have an optimal potential for achieving organizational changes if they have the change-centered leadership style, are intuitive, recognize demands for change, and have power-motivated behavior. Public and private managers are significantly different in relation to change-oriented behavior based on data from 343 managers in two public organizations and one private. One result was unexpected: public managers are more change-oriented than managers in business organizations. As expected, there is no significant difference in change-oriented behavior among managers in public agencies. Possible explanations for these outcomes are presented.     

“Communities of Practice” as an Analytical Construct: Implications for Theory and Practice

Abstract

The “community of practice” (CoP) has emerged as a potentially powerful unit of analysis linking the individual and the collective because it situates the role of learning, knowledge transfer, and participation among people as the central enterprise of collective action. The authors?uo; surface tensions and highlight unanswered questions regarding CoP theory, concluding that it relies on a largely normative and under-operationalized set of premises. Avenues for theory development and the empirical testing of assertions are provided.