Some unique properties of eigenvector centrality

Eigenvectors, and the related centrality measure Bonacich's c(β), have advantages over graph-theoretic measures like degree, betweenness, and closeness centrality: they can be used in signed and valued graphs and the beta parameter in c(β) permits the calculation of power measures for a wider variety of types of exchange. Degree, betweenness, and closeness centralities are defined only for classically simple graphs—those with strictly binary relations between vertices. Looking only at these classical graphs, where eigenvectors and graph–theoretic measures are competitors, eigenvector centrality is designed to be distinctively different from mere degree centrality when there are some high degree positions connected to many low degree others or some low degree positions are connected to a few high degree others. Therefore, it will not be distinctively different from degree when positions are all equal in degree (regular graphs) or in core-periphery structures in which high degree positions tend to be connected to each other.     

Bridges and Barriers: Religion and Immigrant Occupational Attainment across Integration Contexts

This article advances knowledge about context‐dependent impacts of religion on immigrant structural integration. Drawing on theories of inter‐generational immigrant integration, it identifies and spells out two context‐dependent mechanisms through which religion impinges upon structural integration – as ethnic marker prompting exclusion and discrimination, or as social organization providing access to tangible resources. The propositions are empirically tested with nationally representative data on occupational attainment in three different integration contexts which vary in religious boundary configurations and religious field characteristics – the United States, Canada, and Western Europe. Using data from the US General Social Survey, the Canadian Ethnic Diversity Survey, and the European Social Survey, the article analyzes indirect and direct effects of religious affiliation and participation on occupational attainment among first and second generation immigrants. The analyses find only limited evidence for the assumption that in contexts with strong religious boundaries (such as Western Europe and, to a lesser extent, Canada), immigrants face religious penalties in structural integration. By contrast, the analyses support the assumption that in contexts with a thriving religious field (such as the United States and, to a lesser extent, Canada), religious attendance tends to be positively related to occupational attainment, especially for the second generation. For the first time, the article empirically tests arguments about transatlantic differences in the role of religion for immigrant structural integration, and it suggests ways of better integrating micro‐oriented survey research with macro‐oriented institutional analysis.     

Shared spaces,shared structures: Latino social formation and African American English in the U.S. south

This study examines the appropriation of grammatical structures of African American English (AAE) by adolescent Latinos attending a multi‐ethnic middle school in North Carolina. The study couples quantitative variationist analysis of four ‘core’ grammatical features of AAE (invariant be, copula deletion, past‐tense copula leveling, and third‐person singular –s absence) with the findings of an ethnographic study of Latino adolescent identity in order to better understand the social processes leading to the incorporation of AAE grammar into English varieties spoken by Latinos. Results show that Latino students from across social formations make use of AAE grammatical features, but differ significantly from African American students in terms of sociolinguistic patterning. Ethnographic data shed light on linguistic data in three domains: (1) differences in use of AAE structures between male and female Latino/a students; (2) the prolific use of AAE by one gang‐affiliated student; and (3) the racial complexities within the ethnic category ‘Latino.’     

Caregiving Load and Respite Service Use: A Comparison between Older Caregivers and Younger Caregivers

Study aims were to explore differences in predictors of respite care use between older (aged 65+) and younger caregivers (aged 18–64 years), and associations between caregiving load and respite care use using multivariate logistic regression analysis and unpaid caregiver (n= 10,500) data from the 2009 California Health Interview Survey. Caregiving load comprised number of care recipients, weekly hours in caregiving, and caregiving duration. Variables with a significant association with respite care for older caregivers were female gender, income, and health insurance. For younger caregivers, respite care use associations were with ethnicity, caregiving relationship, education, and availability of substitute help.     

New directions in special education research

The article examines current and emerging trends in special education research. The role of scientific inquiry in shaping educational services for children with disabilities is emphasized, with a dual focus on (a) topic areas that are most fertile for future inquiry and (b) the scientific methods that researchers will use to address those topics.     

Transition strategies for youths with sensory impairments: Educational,vocational and independent living considerations

Students with sensory impairments comprise a heterogeneous group that is often underserved by rehabilitation and other social services. This underserved status has been attributed to poor interagency collaboration and eligibility issues, the low incidence nature of these disabilities, and the shortage of trained professionals to address the specialized needs of these individuals. This article examines important educational and vocational characteristics of this population to assist rehabilitation professionals in supporting more effective transitions into employment and other adult roles. Specific transition considerations include unique learning challenges, assessment issues, assistive technology, and accommodations. The article concludes with strategies for transition planning, community integration, and evaluating transition outcomes.     

Management vs. leadership

What makes a good manager? A review of recent literature finds it's the person who deftly works behind the scenes, juggling many tasks and living in the world full of contradictions.     

Internal validity in rehabilitation research

In experimental research, internal validity is the extent to which the researcher can conclude that the manipulation of the independent variable caused change in the dependent variable. Without causal inference, researchers and research consumers would not be able to meaningfully interpret the results of experiments. This article discusses (a) threats to internal validity in rehabilitation research an (b) experimental procedures that can aid rehabilitation researchers in maximizing the internal validity of their investigations.     

Multiple regression in rehabilitation research

This article examines applications of multiple regression in rehabilitation research. The authors address the logic and assumptions of correlational research, annotated with examples from the contemporary rehabilitation and allied health literature. As a means of testing relationships between a set of independent variables and one dependent variable, multiple regression is presented as a flexible and useful data analytic strategy.