Improving Weight of Evidence Approaches to Chemical Evaluations

Federal and other regulatory agencies often use or claim to use a weight of evidence (WoE) approach in chemical evaluation. Their approaches to the use of WoE, however, differ significantly, rely heavily on subjective professional judgment, and merit improvement. We review uses of WoE approaches in key articles in the peer‐reviewed scientific literature, and find significant variations. We find that a hypothesis‐based WoE approach, developed by Lorenz Rhomberg et al., can provide a stronger scientific basis for chemical assessment while improving transparency and preserving the appropriate scope of professional judgment. Their approach, while still evolving, relies on the explicit specification of the hypothesized basis for using the information at hand to infer the ability of an agent to cause human health impacts or, more broadly, affect other endpoints of concern. We describe and endorse such a hypothesis‐based WoE approach to chemical evaluation.     

Do male dropouts benefit from obtaining a GED, postsecondary education, and training?

The authors use longitudinal data from the National Longitudinal Survey of Youth to investigate whether the wage trajectories of male high school dropouts are affected by the acquisition of the General Educational Development (GED) credential, by postsecondary education, and by training. The authors show that acquisition of the GED results in wage increases for dropouts who left school with weak skills, but not for dropouts who left high school with stronger skills. College and training provided by employers are associated with higher wages for male dropouts.     

The utilitarian contract: A generalization of Rawls' theory of justice

In a series of major papers culminating in A Theory of Justice, John Rawls constructs an alternative to utilitarianism by developing a social contract theory of moral and political philosophy. Unfortunately, Rawls formulates the two basic principles upon which the theory rests in such a way as to restrict (unduly) the contract theory's applicability (see Section I). In this paper we present a more general discussion of the theory of justice that avoids the problems of Rawls' formulation and yet retains the important idea of justice as fairness and the contractarian approach (Section II). Later it is argued that this more general theory constitutes a bridge between the pure utilitarian theories and the social contract doctrines (Sections V and VI). The theory's advantages are demonstrated by applying it to a problem discussed by Rawls, intergenerational equity, and comparing the two solutions (Section III). Further comparisons are made and inferences drawn in the concluding three sections.Without implicating them, we would like to thank James M. Buchanan and David Lyons for comments on an earlier draft of this paper.

---

     

Online Gaming Practices of Preteens: Independent Entertainment Time and Transmedia Game Play

This article examines online gaming practices of 7‐ to 11‐year‐olds in home settings in the United States. Based on observations and interviews with children and parents, the analysis considers the specificity of preteen experiences within domestic settings. Employing a socio‐cultural approach, the article analyses ways online gaming is strongly shaped by specific social and developmental factors that relate specifically to preteens. Children's online gaming is analysed as a form of independent entertainment time that reflects limitations experienced by preteens in this study as well as developmental characteristics of this age range. Further, the analysis indicates that gaming practices of preteens are embedded in wider transmedia play practices.     

Children's Media‐referenced Games: The Lived Culture of Consumer Texts on a School Playground

This article analyses empirical data including observations, videos and interviews from an ethnographic study of a multilingual, multiethnic school playground in London, UK. The analysis examines social uses of media references in playground games, drawing on literature in the field of consumer culture. The main argument is that children's consumer culture is constituted on the playground within media‐referenced play through a combination of creating distinctions and building affiliations. The article addresses a gap in the literature in the fields of sociology and anthropology of consumer culture which largely construct children's consumer culture as exceptional to or derived from adult consumer culture.     

Exploring the Intersection of Environmental Degradation and Poverty: Environmental Injustice in Nairobi,Kenya

Environmental justice explores the nexus between structural inequalities and environmental degradation. Although scholarship on environmental justice is vast, this literature is centred in developed countries, rather than exploring the injustices occurring in international contexts. This study aims to address this gap through a combined phenomenological and ethnographic approach in Jam City, a poor community in Nairobi, Kenya. Findings that are discussed include the similarities of environmental injustices between Jam City and the established literature as well as several nuances with the literature, including how lack of resources for response perpetuates injustice and how environmental hazards may not be explicitly dangerous but can still cause disparate harms. This study supports the argument that social workers should be more involved in promoting environmental justice by increasing our focus on the topic in our curriculum, research and practice.     

Conversations for Connection: An Outcome Assessment of the Hold‐Me‐Tight Relationship‐Education Program,and Recommendations for Improving Future Research Methodology in Relationship Education

The Hold Me Tight (HMT) program is a new approach to relationship education based on Emotionally‐Focused Therapy (Johnson, 2004), an evidence‐based approach to couple therapy. In this exploratory longitudinal research, we examined individual growth in relationship satisfaction and trust for partners in 95 couples in 16 HMT groups across four occasions of measurement: Baseline, Pre‐Program, Post‐Program and at either 3‐ or 6‐month Follow‐Up. We found that relationship satisfaction and trust increased during program participation, and declined during follow‐up. We believe our findings provide support for the short‐term effectiveness of the HMT program, and suggest a longer period of program delivery may result in improved retention of gains. Finally, we present recommendations for improving the design of future longitudinal research in relationship education.     

Understandings of environmental injustice and sustainability in marginalized communities: A qualitative inquiry in Nevada

As eco‐social work practice and scholarship continues to grow, multiple frameworks are emerging to help guide the work. In this study, we interviewed 59 people affected by environmental injustice. Participants identified components within both environmental injustice and sustainability, as well as gaps that these models individually do not support. Therefore, we suggest that merging environmental justice with sustainability through centering justice (a component within environmental justice), and also finding solutions through technological advances (a component within sustainability), may best support these communities. In addition, the participants discussed the need for support, which social workers can provide.     

Another Cautionary Note about R 2: Its Use in Weighted Least-Squares Regression Analysis

A recent article in this journal presented a variety of expressions for the coefficient of determination (R ²) and demonstrated that these expressions were generally not equivalent. The article discussed potential pitfalls in interpreting the R ² statistic in ordinary least-squares regression analysis. The current article extends this discussion to the case in which regression models are fit by weighted least squares and points out an additional pitfall that awaits the unwary data analyst. We show that unthinking reliance on the R ² statistic can lead to an overly optimistic interpretation of the proportion of variance accounted for in the regression. We propose a modification of the estimator and demonstrate its utility by example.