Testing When a Parameter is on the Boundary of the Maintained Hypothesis

This paper considers testing problems where several of the standard regularity conditions fail to hold. We consider the case where (i) parameter vectors in the null hypothesis may lie on the boundary of the maintained hypothesis and (ii) there may be a nuisance parameter that appears under the alternative hypothesis, but not under the null. The paper establishes the asymptotic null and local alternative distributions of quasi‐likelihood ratio, rescaled quasi‐likelihood ratio, Wald, and score tests in this case. The results apply to tests based on a wide variety of extremum estimators and apply to a wide variety of models. Examples treated in the paper are: (i) tests of the null hypothesis of no conditional heteroskedasticity in a GARCH(1, 1) regression model and (ii) tests of the null hypothesis that some random coefficients have variances equal to zero in a random coefficients regression model with (possibly) correlated random coefficients.     

Developmental Foundations and Clinical Applications of Social Information Processing: A Review

Social information processing has emerged as an important construct in understanding children's interpersonal functioning. This article reviews (a) the theoretical models guiding research, (b) the development of normative and atypical social problem solving, and (c) the connection between social information processing and individual differences in functioning. Finally, this review ends with a summary of efficacy of programs aimed at preventing social information processing biases or intervening with youth who display dysfunctional social information processing skills.     

Generalized growth curve models for longitudinal data in application to a randomized controlled trial

Growth curve analysis is beneficial in longitudinal studies, where the pattern of response variables measured repeatedly over time is of interest, yet unknown. In this article, we propose generalized growth curve models under a polynomial regression framework and offer a complete process that identifies the parsimonious growth curves for different groups of interest, as well as compares the curves. A higher order of a polynomial degree generally provides more flexible regression, yet it may suffer from the complicated and overfitted model in practice. Therefore, we employ the model selection procedure that chooses the optimal degree of a polynomial consistently. Consideration of a quadratic inference function (Qu et al., 2000) for estimation on regression parameters is addressed and estimation efficiency is improved by incorporating the within-subject correlation commonly existing in longitudinal data. In biomedical studies, it is of particular interest to compare multiple treatments and provide an effective one. We further conduct the hypothesis test that assesses the equality of the growth curves through an asymptotic chi-square test statistic. The proposed methodology is employed on a randomized controlled longitudinal dataset on depression. The effectiveness of our procedure is also confirmed with simulation studies.     

“I'm Still Fighting for the Two of Us”: How Partners of UK Veterans Construct Their Experience of Living with Combat‐Related Trauma

There has been little qualitative research into the experiences of UK partners of veterans with PTSD. This study therefore aimed to explore how partners constructed their experiences of living with the condition. Fifteen female partners of male UK veterans were recruited and interviewed. Using a social constructionist thematic analysis, five themes were constructed: the women's need to subdue own emotional and behavioral responses; dilemmas about whether the veteran was unwell or ‘bad’; attempts at negotiating multiple roles; challenging the narrative of veterans as heroes; and the relational struggle with the transition to nonmilitary life. This study highlighted the importance of considering the veteran as existing within a relational and cultural context, and the need to include partners in therapeutic interventions.     

Medicaid Beneficiaries' Access to Residential Care Settings

Residential care settings (RCSs) are community-based housing and supportive services providers. Medicaid beneficiaries' access to RCSs is of concern to policymakers and other stakeholders because most people prefer community-based to institutional services and RCSs are generally less expensive than nursing homes. To better understand Medicaid beneficiaries' access to state-licensed RCSs, we examined Medicaid policies in 50 states and the District of Columbia, interviewed seven subject-matter experts, and conducted four state case studies informed by reviews of state policies and interviews with 27 stakeholders. Factors identified as influencing Medicaid beneficiaries' access to RCSs include Medicaid reimbursement rates for RCS services, the supply of Medicaid-certified RCSs and RCS beds, and policies that affect RCS room and board costs for Medicaid beneficiaries. Shifting Medicaid spending toward community-based instead of institutional care may require attention to these interrelated issues of RCS payment, supply, and room and board costs.     

Status of personal health requirement for graduation at institutions of higher education in the United States

Objective: The purpose of this study was to examine the proportion of higher education institutions in the United States that require a personal health course (PHC) for graduation and to describe the nature of such requirements. Participants: This study included a random sample of public and private institutions of higher education (IHE) with undergraduate programs within the United States (N = 310). Data were collected between September 2014 and May 2015. Methods: University catalogs were accessed from the institutions' public Web sites to determine whether a PHC was offered, and whether it was exclusively or optionally required for graduation. Results: The majority (55.8%) of the sample offered at least 1 PHC, with only 10% exclusively requiring the course and an additional 10% optionally required the course. Conclusions: Although the utility of undergraduate students completing a PHC is clear, the majority of institutions do not require such a course for degree conferral.     

Reliability and validity of the Vulnerability Index-Service Prioritization Decision Assistance Tool (VI-SPDAT) in real-world implementation

This study examined the reliability and validity of the Vulnerability Index-Service Prioritization Decision Assistance Tool (VI-SPDAT), a widely-used assessment of the health and social vulnerabilities and housing needs of individuals experiencing homelessness. Homeless Management Information System data were obtained for 1495 individuals who were administered the VI-SPDAT between 2014 and 2016. Subsamples were selected for reliability and validity assessments. Results suggest there are challenges to the reliability and validity of the VI-SPDAT in practical use. VI-SPDAT total scores did not significantly predict risk of return to homeless services, while type of housing was a significant predictor. Vulnerability assessment instruments have important implications for communities working to end homelessness by facilitating prioritization of scarce housing resources. Findings suggest that further testing and development of the VI-SPDAT is necessary.     

A two-stage phase II trial design utilizing both primary and secondary endpoints

Phase II trials in oncology drug development are usually conducted to perform the initial assessment of treatment activity. The common designs in this setting, for example, Simon 2-stage designs, are often developed based on testing whether a parameter of interest, usually a proportion (e.g. response rate), is less than a certain level or not. These designs usually consider only one parameter. However, sometimes we may encounter situations where we need to consider not a single parameter, but multiple parameters. This paper presents a two-stage design in which both primary and secondary endpoints are utilized in the decision rules. The family-wise Type 1 error rate and statistical power of the proposed design are investigated under a variety of situations by means of Monte-Carlo simulations.     

Family structure and the intergenerational transmission of educational advantage

I examine whether the effect of parents’ education on children’s educational achievement and attainment varies by family structure and, if so, whether this can be explained by differential parenting practices. Using data from the National Education Longitudinal Study of 1988, I find that as parents’ education increases, children in single mother families experience a lower boost in their achievement test scores, likelihood of attending any post-secondary schooling, likelihood of completing a 4-year college degree, and years of completed schooling relative to children living with both biological parents. Differences in parents’ educational expectations, intergenerational closure, and children’s involvement in structured leisure activities partially explain these status transmission differences by family structure. The findings imply that, among children with highly educated parents, children of single mothers are less likely to be highly educated themselves relative to children who grow up with both biological parents.