Score-based likelihood ratios for handwriting evidence

Score-based approaches for computing forensic likelihood ratios are becoming more prevalent in the forensic literature. When two items of evidential value are entangled via a scorefunction, several nuances arise when attempting to model the score behavior under the competing source-level propositions. Specific assumptions must be made in order to appropriately model the numerator and denominator probability distributions. This process is fairly straightforward for the numerator of the score-based likelihood ratio, entailing the generation of a database of scores obtained by pairing items of evidence from the same source. However, this process presents ambiguities for the denominator database generation - in particular, how best to generate a database of scores between two items of different sources. Many alternatives have appeared in the literature, three of which we will consider in detail. They differ in their approach to generating denominator databases, by pairing (1) the item of known source with randomly selected items from a relevant database; (2) the item of unknown source with randomly generated items from a relevant database; or (3) two randomly generated items. When the two items differ in type, perhaps one having higher information content, these three alternatives can produce very different denominator databases. While each of these alternatives has appeared in the literature, the decision of how to generate the denominator database is often made without calling attention to the subjective nature of this process. In this paper, we compare each of the three methods (and the resulting score-based likelihood ratios), which can be thought of as three distinct interpretations of the denominator proposition. Our goal in performing these comparisons is to illustrate the effect that subtle modifications of these propositions can have on inferences drawn from the evidence evaluation procedure. The study was performed using a data set composed of cursive writing samples from over 400 writers. We found that, when provided with the same two items of evidence, the three methods often would lead to differing conclusions (with rates of disagreement ranging from 0.005 to 0.48). Rates of misleading evidence and Tippet plots are both used to characterize the range of behavior for the methods over varying sized questioned documents. The appendix shows that the three score-based likelihood ratios are theoretically very different not only from each other, but also from the likelihood ratio, and as a consequence each display drastically different behavior.     

The consequences of perpetrating psychological aggression in dating relationships: a descriptive investigation

Psychological aggression is the most prevalent form of aggression in dating relationships, with women perpetrating as much, if not more, psychological aggression than men. Researchers have advocated for an examination of the consequences that follow psychological aggression for the perpetrator, in hopes that this will lead to innovative intervention programs aimed at ameliorating dating violence. The current study investigated the self-reported consequences of having perpetrated psychological aggression against a dating partner among female college students in a current dating relationship (N = 115). Participants endorsed numerous consequences as having followed their perpetration of psychological aggression, including both punishing and potentially reinforcing consequences. Furthermore, findings indicated that for some perpetrators, psychological aggression may function as a method of emotion regulation. Implications of these findings for future research and intervention are discussed.     

Howzat! Navigating Gender Disruptions in Australian Young Women’s Cricket

ABSTRACT

“Howzat” is colloquially used by cricketers to ask the umpire “How is that?” when they believe a batter is out. We employ this question here to frame interrogations of young women’s experiences as they navigate elite pathway cricket in an era of significant change. The global sports entertainment industry is, it seems, undergoing a form of gender disruption. The remuneration for Australian women cricketers rose by over 500 per cent between 2012 and 2017, providing opportunities for women and girls to transition to professional sport in ways quite different from historical amateur pathways. While on the surface this shapes as a time of great opportunity for aspiring sportswomen, there are unintended consequences that warrant consideration—particularly for females involved in sports with a legacy of masculine privilege. This article draws on qualitative research concerning five female pathway players and their respective parents, coaching and administrative staff who support them as they navigate the demands of playing elite cricket during adolescence. We employ Foucault’s concept of a “history of the present” to make sense of this dispositif to problematise how young women navigate gendered experiences in sports with “masculine” traditions amid a growing profile of women’s sport in Australia.     

The role of shame, anger, and affect regulation in men's perpetration of psychological abuse in dating relationships

This study determines the relationships between shame, anger, and men's perpetration of psychological abuse in dating relationships. The authors hypothesize the connection between shame proneness and men's use of psychological abuse with a dating partner, with anger's mediating in this relationship. In addition, the authors hypothesize that affect regulation would moderate the relationship between anger and men's use of psychological abuse. Results indicate that shame proneness and use of psychological abuse are significantly related and that anger mediates the relationship. However, affect regulation does not moderate the effects of anger on men's use of psychological abuse. These findings are consistent with theoretical conceptualizations of shame and have implications for intervention and treatment programs for perpetrators of psychological abuse in dating relationships.     

The evidential value of cosmetic foundation smears in forensic casework

Cosmetic foundation products are easily transferred to clothing and other surfaces as a result of contact with such objects. Examination of past cases involving cosmetics in New Zealand has shown cosmetic foundation to be one of the more common cosmetic products encountered. The aim of this research was to determine the most discriminating method for the comparison of transferred foundation with samples obtained from a known source in forensic casework. Fifty-three foundation samples were analyzed by Fourier transform infrared spectroscopy (FTIR), gas chromatography with a flame ionization detector (GC-FID) and scanning electron microscopy-energy dispersive X-Ray analysis (SEM-EDX). It was found that a 5 mm2 section of a light smearing was enough to provide detectable results. The discriminating powers for FTIR, SEM-EDX and GC-FID were 98.3, 93.8, and 82.0% respectively. A combination of all three techniques provided a discriminating power of 99.7%, meaning that almost complete discrimination was achieved between the foundation samples.