Prediction of race using characteristics of dental morphology

Historically, forensic anthropology has concentrated on race determination using skeletal morphological variation. Conversely, dental anthropology has been concerned with worldwide patterns of dental morphological variation. This paper represents a synthesis of the goals of forensic anthropology with the methods of dental anthropology. Dentitions of modem African Americans (n = 110) and European Americans (n = 155) were observed using methods based on the Arizona State University dental morphology standards. Of 136 characters observed, eight were found with frequencies that were very different between the groups. Based on these eight characteristics, probability tables were created for determining an individual's social race, using both Bayesian prediction and logistic regression. These tables are applicable for determining the probability that an unknown individual can be categorized as African American or European American. This method was tested on 40 individuals known to belong in one of these two ancestral groups. Correct assignment of race was made in 90% of cases.     

Reintegrating seriously violent and personality-disordered offenders from a supermaximum security institution into the general offender population

Offenders who have committed serious violent acts while incarcerated are often segregated and housed in supermaximum security facilities. Given the highly restricted regime under which they are detained, it is often difficult to decide if they are safe enough to be discharged. However, there is a need to reintegrate them into the general offender population in a lower security institution for humane, correctional, and financial reasons. We propose a transitional strategy to facilitate their reintegration by way of a maximum-security step-down treatment-oriented facility within which both their security requirements and treatment needs could be adequately met. The present study reports the results of such an approach. More than 80% of the offenders (n = 31) were reintegrated into a lower-security facility without relapsing and being returned to the supermaximum institutions within a follow-up period of 20 months. They also have lower institutional offense rate postreintegration compared to prereintegration.     

Twenty years of progress in the study of trauma

In this article, the authors argue that studies investigating the nature of traumatic memory have made the greatest contribution to trauma research in the past 20 years. Neuroimaging studies provide empirical support for the diagnosis of posttraumatic stress disorder and have important implications for the treatment of trauma survivors. In the future, the authors hope to see an empirically derived model of trauma that incorporates both mediating and moderating factors to predict outcome.     

Effects of face-to-face restorative justice on victims of crime in four randomized,controlled trials

The growing use of restorative justice provides a major opportunity for experimental criminology and evidence-based policy. Face-to-face meetings led by police officers between crime victims and their offenders are predicted to reduce the harm to victims caused by the crime. This prediction is derived not only from the social movement for restorative justice, but also from the microsociology of interaction rituals (Collins, 2004). Four randomized, controlled trials of this hypothesis in London and Canberra, with point estimates disaggregated by gender, tested the prediction with measures of both successful interaction ritual (apologies received and their perceived sincerity) and the hypothesized benefits of the ritual (on forgiveness of, and reduced desire for violent revenge against, offenders, and victim self-blame for the crime). The meta-analyses of the eight point estimates suggest success (as victims define it) of restorative justice as an interaction ritual, and as a policy for reducing harm to victims.     

The EDNAP mitochondrial DNA population database (EMPOP) collaborative exercises: organisation, results and perspectives

This paper presents an overview of the organisation and the results of the collaborative exercises (CE) of the European DNA Profiling (EDNAP) Group's mitochondrial DNA population database project (EMPOP). The aim of the collaborative exercises was to determine whether uniformity of mtDNA sequencing results could be achieved among different laboratories. These were asked to sequence either the complete mtDNA control region or the two hypervariable regions HVI (16024-16365) and HVII (73-340) from DNA extracts, buccal swabs or bloodstains, proceeding in accordance with the protocol and strategies used in each individual laboratory. The results of the collaborative exercises were employed to identify possible sources of errors that could arise during the analysis and interpretation of mtDNA profiles. These findings were taken as a basis to tentatively make suitable arrangements for the construction of a high quality mtDNA database. One hundred fifty mtDNA profiles were submitted to the evaluating laboratory, and disaccording profiles were classified into four groups corresponding to the source of error: clerical errors, sample mix-ups, contaminations and discrepancies with respect to the mtDNA nomenclature. Overall, 14 disaccording haplotypes (16 individual errors) were observed. The errors included 10 clerical errors, 3 interpretation problems, 2 cases of sample mix-up and 1 case of point heteroplasmic mixture, where the 2 sequencing reactions brought inconsistent base calls. This corresponds to an error rate of 10.7% in a virtual mtDNA database consisting of the collaborative exercise results. However, this estimate is still conservative compared to conclusions drawn by authors of meanwhile numerous publications critically reviewing published mtDNA population databases. Our results and earlier published concerns strongly emphasize the need for appropriate safety regulations when mtDNA profiles are compiled for database purposes in order to accomplish the high standard required for mtDNA databases that are used in the forensic context.     

Using STR analysis to detect human DNA from exploded pipe bomb devices

This study investigated the possibility of recovering a bomb assembler's DNA from an exploded pipe bomb device. Metal and polyvinyl chloride (PVC) pipes were examined to determine if one surface type would allow better DNA recovery than the other. Ten subjects each handled components of one metal and one PVC pipe bomb. The bombs were exploded, the fragments were collected and swabbed using the double swab technique, and the samples were extracted, quantified, amplified, and genotyped using polymerase chain reaction/short tandem repeat (PCR/STR). Of the 20 bombs handled by the subjects, four bombs gave reportable results that matched the subject's known DNA profiles. An additional eight profiles, also matching the subject's known DNA profiles, were generated but were below the reportable threshold. There was no difference in the success rate of obtaining DNA profiles related to the use of either PVC or metal in the manufacture of the pipe bomb. The variables that appeared to have the greatest influence on the success of generating a DNA profile were the amount of fragmentation and subsequent recovery of the bomb fragments. It is suspected that successful DNA profiling could also be dependent upon the bomb assembler's propensity to slough skin cells on objects they handled.     

What's looks got to do with it? Instructor appearance and student evaluations of teaching

Some studies suggest that instructors' looks are important determinants of their Student Evaluations of Teaching (SET) results. Yet the studies examining this proposition leave out many independent variables that have been found to be important determinants of SETs in the SET literature. This study adds in most such factors and finds that, controlling for these other factors, attractiveness has no effect in our data. We conclude that earlier findings indicating that instructor appearance is important are likely due to omitted variable bias. © 2005 by the Association for Public Policy Analysis and Management     

A comparison of adjustment methods to test the robustness of an STR DNA database comprised of 24 European populations

An aim of the European Network of Forensic Science Institutes (ENFSI) is to produce a DNA database of second generation multiplex (SGM) STR profiles that is representative of the resident cosmopolitan populations. To achieve this, data were collected from 24 different populations. All of the data were combined to form one database of 5700 profiles from which allele proportions were calculated. The robustness of this combined European database was tested by estimating parameter d for every DNA profile, where d=log(10)(Pm(c)/Pm(E)) Pm(c) is the match probability of the profile calculated from its cognate database and Pm(E) is the match probability of the combined European database. Overall there was a small tendency for Pm(c)>Pm(E) primarily because of sampling bias. This bias was removed by the simple expediency of applying an adjustment factor to the calculation of Pm(E). These were selected from the Balding size bias correction, the Balding and Nichols Fst correction, a minimum allele proportion (between 0.01 and 0.02), an upper bound of a 95% confidence interval (CI) and a lower bound on the genotype match probability. It was demonstrated that a single European database is a feasible proposition. A combination of different adjustment methods can be used to ensure that the result is conservative relative to the cognate database, and their effect measured by parameter d.     

Breadth and Intensity of Youth Activity Involvement as Contexts for Positive Development

Research has linked youth activity involvement to positive development. However, past studies have confounded at least two separable dimensions of involvement: breadth (number of activities) and intensity (participation frequency). Theory and the limited available evidence suggest that these dimensions may make independent contributions to development. Based on self-reports from 7430 high school students, this study assessed whether breadth and intensity dimensions were related to each other, to a typical aggregate measure of involvement, and to various indicators of positive development. Breadth and intensity were moderately interrelated and, in combination, they explained the majority of the variance in the typical involvement measure. Both dimensions were positively related to each development index. When examined simultaneously, only breadth had a unique relation with each developmental index. Further, evidence of nonlinear effects was found. Findings were consistent across age levels. Implications for measurement of involvement and interpretations of the extant research are discussed.