Busy Signal: Effects of Mobile Device Usage on Pedestrian Encounters

Mobile communication technology plays an increasingly pervasive role in everyday life. This study examined one aspect of this role, specifically, the effects of mobile device use on the micro-interactions of pedestrians as they approached and passed a confederate. Over 400 participants were observed in a 2 (group: mobile device vs. control) × 3 [condition: look-only (L); look and smile (LS); look, smile, and greeting (LSG)] factorial design study measuring participants’ looks, smiles, nods, and greetings toward the confederates. Log-linear analyses of the dependent measures provided qualified support for the predicted decreased responsiveness from mobile device users. Specifically, a group by condition interaction on smiles showed that significantly fewer mobile device users than controls smiled at the confederates in the LSG condition. In addition, a group by sex of participant interaction on greetings indicated that significantly fewer female mobile device users offered greetings than males and females in the other conditions. The processes potentially mediating these effects are discussed and the broader influence of mobile devices on the micro-interactions of pedestrians is considered.     

Estimation and Classification of BOLD Responses Over Multiple Trials

In this article, we model functional magnetic resonance imaging (fMRI) data for event-related experiment data using a fourth degree spline to fit voxel specific blood oxygenation level-dependent (BOLD) responses. The data are preprocessed for removing long term temporal components such as drifts using wavelet approximations. The spatial dependence is incorporated in the data by the application of 3D Gaussian spatial filter. The methodology assigns an activation score to each trial based on the voxel specific characteristics of the response curve. The proposed procedure has a capability of being fully automated and it produces activation images based on overall scores assigned to each voxel. The methodology is illustrated on real data from an event-related design experiment of visually guided saccades (VGS).     

Hypothesis testing, power and sample size determination for between group comparisons in fMRI experiments

Modern methods for imaging the human brain, such as functional magnetic resonance imaging (fMRI) present a range of challenging statistical problems. In this paper, we first develop a large sample based test for between group comparisons and use it to determine the necessary sample size in order to obtain a target power via simulation under various alternatives for a given pre-specified significance level. Both testing and sample size calculations are particularly critical for neuroscientists who use these new techniques, since each subject is expensive to image.     

Engaging Expert Peers in the Development of Risk Assessments

The participation of external technical experts in the development of risk assessment documents and methodologies has expanded and evolved in recent years. Many government agencies and authoritative organizations have experts peer review important works to evaluate the scientific and technical defensibility and judge the strength of the assumptions and conclusions (OMB, 2004; IPCS, 2005; IARC, 2006; Health Canada, 2007; U.S. EPA, 2006). Expert advice has been solicited in other forms of peer involvement, including peer consultation in, for example, the U.S. EPA's Voluntary Children's Chemical Evaluation Program (VCCEP). This article discusses how the principles and practices of peer review can be extended to other types of peer involvement activities (i.e., peer input and peer consultation) to develop high-quality risk assessment work products. A comprehensive process for incorporating peer input, peer consultation, and peer review into risk assessment science is outlined. Four key principles for peer involvement-independence, inclusion of appropriate experts, transparency, and a robust scientific process-are discussed. Recent examples of peer involvement in the development of Health Canada's Priority Substances and Domestic Substance List (DSL) programs under the Canadian Environmental Protection Act (CEPA) serve to highlight the concepts.     

Black women’s mental health matters: Theoretical perspectives and future directions

Despite recent sociological research exploring how stratification systems impinge on the health of socially disadvantaged populations, Black women’s mental health is rarely a topic of investigation among scholars of medical sociology, sociology of race and racism, or sociology of gender. In this review, we incorporate perspectives from sociology, social psychiatry, psychology, and social work to develop a transdisciplinary intersectional model of Black women’s mental health. We also present critical interventions in the extant literature. First, though stress exposure is generally associated with poor mental health, more research is necessary to ascertain the gendered-racialized stressors to which Black women are exposed, owing to their racial and gender oppression. Second, we admonish mental health scholars to incorporate other status dimensions (e.g., nativity, sexual orientation, age) to provide a more nuanced depiction of Black women’s psychological health. Third, the unique and enduring relationship between the U.S. punishment system and the mental health of Black women should be further explicated in future research. Last, we envision a body of work on Black women’s mental health that captures the ways in which they cope with societal level marginalization, as these forms of resilience and resistance may be mental health protective.     

Bridges to Sobriety: Testing the Feasibility and Acceptability of a Mobile App Designed to Supplement an Adolescent Substance Use Disorder Treatment Program

Clinical Social Work Journal - Adolescent substance use is a growing problem that causes a myriad of negative outcomes. Using substances during adolescence can lead to decreased executive...     

The Influence of Volunteer Recruitment Practices and Expectations on the Development of Volunteers’ Psychological Contracts

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Volunteer recruitment and retention continue to be important issues for not-for-profit organisations. A theoretical...     

Racial Stratification and the Confederate Flag: Comparing Four Perspectives to Explain Flag Support

Recent events have brought attention to Confederate monuments positioned across the USA and polarized debates about their proper placement; however, prior research examining support for Confederate symbols is largely limited to white Americans. This study examines public support for the South Carolina Confederate flag using four perspectives of racial stratification—black/nonblack, combined race-ethnicity, ethnoracial pentagon, and nonwhite/white. Using data from two nationally representative surveys of noninstitutionalized US adults collected in 2000 and 2015 (n?=?7638), we identify associations between theories of racial stratification and Confederate flag stances. Multiple model fit indices indicate that the combined race-ethnicity theory of racial stratification best mapped onto public support followed by the ethnoracial pentagon and black/nonblack perspectives. The nonwhite/white model exhibited the poorest fit. Findings from logistic regressions showed that whites had significantly higher odds of supporting the Confederate flag compared to blacks and Latinos. Additionally, blacks had lower odds of flag support than Latinos, Asian Americans, Native Americans, Pacific Islanders, and multiracial respondents. We argue that an overlooked aspect of Confederate monuments is their signified antiblackness demonstrated in this study by greater support for the flag among all nonblack racial-ethnic groups. Findings imply that prioritizing whites’ views in discussions of Confederate monuments offers an inadequate depiction of public opinion by race-ethnicity. Disaggregating views via the combined race-ethnicity measure highlights racial-ethnic variation in support of the South Carolina Confederate flag.