Using the likelihood ratio in bloodstain pattern analysis

There is an apparent paradox that the likelihood ratio (LR) approach is an appropriate measure of the weight of evidence when forensic findings have to be evaluated in court, while it is typically not used by bloodstain pattern analysis (BPA) experts. This commentary evaluates how the scope and methods of BPA relate to several types of evaluative propositions and methods to which LRs are applicable. As a result of this evaluation, we show how specificities in scope (BPA being about activities rather than source identification), gaps in the underlying science base, and the reliance on a wide range of methods render the use of LRs in BPA more complex than in some other forensic disciplines. Three directions are identified for BPA research and training, which would facilitate and widen the use of LRs: research in the underlying physics; the development of a culture of data sharing; and the development of training material on the required statistical background. An example of how recent fluid dynamics research in BPA can lead to the use of LR is provided. We conclude that an LR framework is fully applicable to BPA, provided methodic efforts and significant developments occur along the three outlined directions.     

Incorporating a Healthy Living Curriculum within Family Behavior Therapy: A Clinical Case Example in a Woman with a History of Domestic Violence,Child Neglect,Drug Abuse,and Obesity

Women reported to child protective service agencies frequently report problems that significantly interfere with the health and well-being of their children and themselves. Behavioral treatment programs appear to be effective in managing these co-existing problems, such as domestic violence and substance abuse. However, evidence-supported interventions are rarely exemplified in complicated clinical cases, especially within child welfare settings. Therefore, in this case example, we describe the process of adapting an evidence-supported treatment to assist in managing significant co-existing health-related problems in a mother who was referred due to child neglect and drug abuse. At the conclusion of therapy, the participant reported improvements in perceived family relationships, illicit drug use, child maltreatment potential, whereas other health-related outcomes were mixed. Most improvements were maintained at 4-month follow-up. Issues relevant to implementing evidence-based treatments within community contexts are discussed, including methods of increasing the likelihood of valid outcome assessment, managing treatment integrity, and adjusting standardized treatments to accommodate co-occurring problems.     

A comparison of women of color and non-Hispanic White women on factors related to leaving a violent relationship

This study compares women of color and non-Hispanic White women regarding the influence of socioeconomic status, family investment, and psychological abuse on leaving a violent relationship. It was found that most women who left stayed away for less than a month. Women of color and non-Hispanic White women did not differ in their length or rate of leaving, although women of color left more frequently when they did leave. Factors associated with leaving for both groups were threat with a weapon, psychological abuse, being single, and having fewer adults in the household. Women of color with higher socioeconomic status were less likely to leave, which was not the case for non-Hispanic White women. Non-Hispanic White women were more likely to leave if they had lived with their partners less than 5 years and had children at home.     

Do Politicians Racially Discriminate Against Constituents? A Field Experiment on State Legislators

We use a field experiment to investigate whether race affects how responsive state legislators are to requests for help with registering to vote. In an email sent to each legislator, we randomized whether a putatively black or white alias was used and whether the email signaled the sender's partisan preference. Overall, we find that putatively black requests receive fewer replies. We explore two potential explanations for this discrimination: strategic partisan behavior and the legislators’ own race. We find that the putatively black alias continues to be differentially treated even when the emails signal partisanship, indicating that strategic considerations cannot completely explain the observed differential treatment. Further analysis reveals that white legislators of both parties exhibit similar levels of discrimination against the black alias. Minority legislators do the opposite, responding more frequently to the black alias. Implications for the study of race and politics in the United States are discussed.     

Getting Out the Vote: Minority Mobilization in a Presidential Election

Despite attempts to mobilize communities of color, gaps in turnout among racial and ethnic minorities persist (e.g., Abrajano et al., J Polit 70:368–382, 2008; Pantoja et al., Polit Res Q 54:729–750, 2001; Kaufmann, Polit Res Q 56:199–210, 2003; Ramirez, Ann Am Acad Pol Soc Sci 601:66–84, 2005, Am Polit Res 35:155–175, 2007). Scholars are only beginning to understand how parties or independent groups seek to mobilize these communities. In this paper, we develop and test the Differential Contact Thesis, which holds that turnout differences between whites and minority groups are influenced both by lower rates of contact by the parties and the use of less effective methods of contact. To test this, we examine data from the 2004 National Annenberg Election Study (NAES), 2004 American National Election Study (ANES), and the 2004 Miami Exit Poll. Our results support the Differential Contact Thesis: even controlling for the initial likelihood to be contacted by the parties, racial and ethnic minorities were less likely to be contacted using the most effective techniques. To some extent, non-partisan contact seems to compensate for the inattention of the major parties toward minority voters, but this contact is less likely to mobilize voters than contact from the parties.