Gaining Access to Economically Marginalized Rural Populations: Lessons Learned from Nonprobability Sampling*

Poverty is a significant problem in rural America. Gaining access to economically marginalized rural populations in order to recruit individuals to participate in a research study, however, is often a challenge. This article compares three different nonprobability sampling techniques that have been used to recruit rural, low-income mothers—purposive sampling, respondent-driven sampling, and mixed purposive sampling. We review the relative advantages and drawbacks of the three methods in terms of access to the targeted population, methods of recruitment, size of the sample pool, randomness of the sample, generalizability of results, and researchers' control over the process.     

Density dependence and environmental justice organizations, 1970–2008

Density dependence theory is commonly used to examine trends in the establishment of for-profit organizations. This research extends density dependence theory to the study of political organizations. Specifically, we examine the variation in the number of environmental justice organizations established each year for the years 1970–2008. As density dependence theory predicts, the bivariate association between the number of existing organizations and the number of established organizations takes the polynomial form of an inverted U, indicating that the relationship between existing organizations and emerging organizations is at first cooperative, and then competitive. However, when we control for existing numbers of civil rights and environmental organizations, the results do not conform to density dependence expectations. Multivariate analyses reveal that environmental justice organization have yet to enter a competitive stage, and instead have cooperated over the past twenty-eight years. More generally this finding indicates that for-profit and nonprofit political organizations behave differently.     

Maximizing competence through professional development: increasing disability knowledge among One-Stop Career Center staff

The Workforce Investment Act of 1998 (USA) mandates that partners in the One-Stop Career Center system be prepared to serve a diverse customer base. Effective service delivery depends in part on a focus on human resources and professional development. This article presents innovative strategies for One-Stop Career Center staff training related to serving customers with disabilities. Findings from case study research conducted in several One-Stops across the country revealed that staff struggled with both knowledge and attitudes around disability issues. To address these concerns, local leaders developed practices that provided opportunities to gain practical skills and put acquired knowledge to use. These included a formalized curriculum focused on disability issues; informal support and consultation from a disability specialist; and exposure and learning through internships for students with disabilities. Implications are offered to stimulate thinking and creativity in local One-Stops regarding the most effective ways to facilitate staff learning and, in turn, improve services for customers with disabilities.     

A Bayesian finite mixture change-point model for assessing the risk of novice teenage drivers

The driving risk during the initial period after licensure for novice teenage drivers is typically the highest but decreases rapidly right after. The change-point of driving risk is a critical parameter for evaluating teenage driving risk, which also varies substantially among drivers. This paper presents latent class recurrent-event change-point models for detecting the change-points. The proposed model is applied to the Naturalist Teenage Driving Study, which continuously recorded the driving data of 42 novice teenage drivers for 18 months using advanced in-vehicle instrumentation. We propose a hierarchical BFMM to estimate the change-points by clusters of drivers with similar risk profiles. The model is based on a non-homogeneous Poisson process with piecewise-constant intensity functions. Latent variables which identify the membership of the subjects are used to detect potential clusters among subjects. Application to the Naturalistic Teenage Driving Study identifies three distinct clusters with change-points at 52.30, 108.99 and 150.20?hours of driving after first licensure, respectively. The overall intensity rate and the pattern of change also differ substantially among clusters. The results of this research provide more insight in teenagers' driving behaviour and will be critical to improve young drivers' safety education and parent management programs, as well as provide crucial reference for the GDL regulations to encourage safer driving.     

Housing plus services: supporting vulnerable families in permanent housing

The importance of integrating services with housing to help low-income families achieve stability is gaining recognition. The variations in types of existing housing and service initiatives have produced a complex language with multiple meanings and overlapping definitions. The National Low Income Housing Coalition proposes the umbrella term housing plus services to refer to these programs. Following a review of the literature on the relationship of housing to child well-being, the article discusses and illustrates the National Low Income Housing Coalition's principles for and typology of housing plus services.     

Educating back-injured workers: What should we be teaching?

OBJECTIVE: The purpose of this study was to identify what information people with acute and chronic back pain, health care practitioners, employers and case managers felt should be included in an educational brochure for recently back-injured workers. STUDY DESIGN: Four focus groups were convened, each comprising several representatives from one of the four constituencies. Participants rated 32 information items regarding their inclusion in an educational brochure. Ratings were tabulated for ranking and for group comparisons. RESULTS: While consensus was strong for most information items, there were apparent differences between the groups for several items relating to work resumption, medical attention, and legal or compensation consultation. CONCLUSIONS: Perceived educational needs of back-injured workers may differ from those of their health care practitioners and from their employers or insurers. Future efforts to prevent back disability through education should include evaluation of the informational needs of injured workers.     

Broadening opportunities for job seekers with disabilities: strategies to effectively provide assistive technology in One-Stop centers

The Workforce Investment Act (WIA) of 1998 mandates that partners in the One-Stop Career Center (One-Stop) system be prepared to serve a diverse customer base, including job seekers with disabilities. For many such individuals, effective service delivery depends in part on the existence of appropriate and efficient assistive technology (AT) options. This article presents challenges experienced by One-Stop partners related to AT provision as well as strategies for providing effective AT support. Findings from case study research conducted in several One-Stops across the country revealed three strategies that have enhanced employment services and addressed barriers. These are (a) an accurate assessment of AT needs, (b) staff training and practice using the equipment, and (c) the ability to make the most of limited financial resources. Implications for the most efficient ways to provide AT options are discussed.