Strength in Numbers or Quality over Quantity? Examining the Importance of Criterion Measure Selection to Define Validity Groups in Performance Validity Test (PVT) Research

Mirroring clinical guidelines, recent Performance Validity Test (PVT) research emphasizes using ≥ 2 criterion PVTs to optimally identify validity groups when validating/cross-validating PVTs; however, even with multiple measures, the effect of which specific PVTs are used as criterion measures remains incompletely explored. This study investigated the accuracy of varying two-PVT combinations for establishing validity status and how adding a third PVT or applying more liberal failure cut-scores affects overall false-positive (FP)/-negative (FN) rates. Clinically referred veterans (N = 114; 30% clinically identified as invalid) completing a six-PVT protocol as during their evaluation were included. Concordance rates were calculated across all possible two-and three-PVT combinations at conservative and liberal cutoffs. Two-PVT combinations classified 72–91% of valid (0–4% FPs) and 17–74% of invalid (0–40% FNs) cases, and three-PVT combinations classified 67–86% of valid (0–6% FPs) and 57–97% of invalid (0–24% FNs) at conservative cutoffs. Liberal cutoffs classified 53–86% of valid (0–15% FPs) and 39–82% of invalid (0–30% FNs) cases for two-PVT combinations and 46–75% of valid (3–27% FPs) and 60–97% of invalid (0–17% FNs) cases for three-PVT combinations. Irrespective of whether a two-or three-PVT combination or conservative/liberal cutoffs were used, many valid and invalid cases failed only one PVT (3–68%).Two-PVT combinations produced high FNs and were less accurate than three-PVTs for detecting invalid cases, though variable accuracy was found within both types of combinations based on the specific PVTs in the combination. Thus, both PVT quantity and quality are important for accurate validity classification in research studies to ensure reliability and replicability of findings. Applying more liberal cutoffs yielded increased sensitivity, but with generally higher FPs yielding problematic specificity, particularly for three-PVT combinations.     

The 2018 California Wildfires: Integration of Rapid DNA to Dramatically Accelerate Victim Identification

In November 2018, Butte County, California, was decimated by the Camp Fire, the deadliest wildfire in state history. Over 150,000 acres were destroyed, and at its peak, the fire consumed eighty acres per minute. The speed and intensity of the oncoming flames killed scores of people, and weeks before the fire was contained, first responders began searching through the rubble of 18,804 residences and commercial buildings. As with most mass disasters, conventional identification modalities (e.g., fingerprints, odontology, hardware) were utilized to identify victims. The intensity and duration of the fire severely degraded most of the remains, and these approaches were useful in only 22 of 84 cases. In the past, the remaining cases would have been subjected to conventional DNA analysis, which may have required months to years. Instead, Rapid DNA technology was utilized (in a rented recreational vehicle outside the Sacramento morgue) in the victim identification effort. Sixty-nine sets of remains were subjected to Rapid DNA Identification and, of these, 62 (89.9%) generated short tandem repeat profiles that were subjected to familial searching; essentially all these profiles were produced within hours of sample receipt. Samples successfully utilized for DNA identification included blood, bone, liver, muscle, soft tissue of unknown origin, and brain. In tandem with processing of 255 family reference samples, 58 victims were identified. This work represents the first use of Rapid DNA Identification in a mass casualty event, and the results support the use of Rapid DNA as an integrated tool with conventional disaster victim identification modalities.     

Population drug use in Australia: a wastewater analysis

Accurate information on drug use in communities is essential if health, social and economic harms associated with illicit drug use are to be addressed efficiently. In most countries population drug use is estimated indirectly via surveys, medical presentations and police and custom seizures. All of these methods have at least some problems due to bias, small samples and/or long time delays between collecting the information and analysing the results. Recently the direct quantification of drug residues in wastewater has shown promise as a means of monitoring drug use in defined geographical areas. In this study we measured 3,4-methylenedioxymethamphetamine (MDMA), methamphetamine and benzoylecgonine in sewage inflows in metropolitan and regional areas of Australia and compared these data with published European data. Cocaine use was small compared to European cities (p<0.001) but was compensated for by much greater consumption of methamphetamine (p<0.001) and MDMA (p<0.05). MDMA was more popular in regional areas (p<0.05) whereas methamphetamine and cocaine were mainly consumed in the city (p<0.05). Greater than 5-fold increases in MDMA use were detected on weekends (p<0.001). This approach has the potential to improve our understanding of drug use in populations and should be further developed to improve prevention and treatment programs.     

Sins of the Flesh? Obscenity Law in the Era of Virtual Reality

In the near future, pornography will be interactive, and people will be able to act out their fantasies in virtual reality. What may be unsettling is that some of these fantasies will be quite deviant, including rape, pedophilia and bestiality. The question is how our culture will respond to new technologies used to fulfill these deviant fantasies. This article examines the coming changes in the sex industry and the possible legal challenges that will arise.     

Dealing with the Unthinkable: a Study of the Cognitive and Emotional Stress of Adult and Child Homicide Investigations on Police Investigators

Although the death of a child is without doubt one of the most distressing events imaginable, when it occurs in suspicious circumstances, such as at the hand of a parent or close family member, its effects are often more acute and incomprehensible. This paper presents an exploratory study comparing the cognitive and emotional stressors experienced by police when investigating child and adult homicides. The results of an online survey questionnaire with 99 experienced UK police investigators are presented, with key differences found in the cognitive and emotional stress experienced depending on whether the victim is a child or an adult, key differences and similarities identified in the ways investigators deal and cope with adult and child homicide cases, with a tentative discussion of the implications for the well-being and training of police investigators provided.     

Revisiting the Gender Gap in Political Knowledge

Gender-based differences in political knowledge are pervasive in the United States and abroad. Previous research on the source of these differences has focused on resource differentials or instrumentation, with scholars arguing either that the gender gap is real and intractable, or that it is an artifact of the way the concept is measured. Our study differs from past work by showing that (1) male–female differences in political knowledge persist even when knowledge is measured with recommended practices, but that (2) knowledge gaps can be ameliorated. Across laboratory, survey, and natural experiments, we document how exposure to information diminishes gender-based differences in political knowledge. The provision of facts reduces—and often eliminates—the gender gap in political knowledge on questions covering a range of topics.     

Inspire Magazine: A Critical Analysis of its Significance and Potential Impact Through the Lens of the Information,Motivation, and Behavioral Skills Model

This article presents an analysis of Al Qaeda in the Arabian Peninsula's English language publication Inspire that was conceptualized and conducted on the basis of the Information-Motivation-Behavioral Skills (IMB) framework. The IMB model has been widely tested, validated, and applied across a range of behavior change interventions, and provides both a conceptual and analytic framework to examine the range and quality of content featured across the 11 issues of Inspire that were published and distributed online starting in July of 2010. Inspire has been implicated in multiple instances of terrorism cases in the U.S. and its impact and potential can be analyzed on the extent to which it effectively targets core attitudes, perceptions of social normative support for violence, and its regular featuring of behavioral skills such as bomb making, weapons training, and emphasizing a creative and do-it-yourself ethos.