Approximate Bayesian inference for latent Gaussian models by using integrated nested Laplace approximations

Summary.  Structured additive regression models are perhaps the most commonly used class of models in statistical applications. It includes, among others, (generalized) linear models, (generalized) additive models, smoothing spline models, state space models, semiparametric regression, spatial and spatiotemporal models, log-Gaussian Cox processes and geostatistical and geoadditive models. We consider approximate Bayesian inference in a popular subset of structured additive regression models, latent Gaussian models , where the latent field is Gaussian, controlled by a few hyperparameters and with non-Gaussian response variables. The posterior marginals are not available in closed form owing to the non-Gaussian response variables. For such models, Markov chain Monte Carlo methods can be implemented, but they are not without problems, in terms of both convergence and computational time. In some practical applications, the extent of these problems is such that Markov chain Monte Carlo sampling is simply not an appropriate tool for routine analysis. We show that, by using an integrated nested Laplace approximation and its simplified version, we can directly compute very accurate approximations to the posterior marginals. The main benefit of these approximations is computational: where Markov chain Monte Carlo algorithms need hours or days to run, our approximations provide more precise estimates in seconds or minutes. Another advantage with our approach is its generality, which makes it possible to perform Bayesian analysis in an automatic, streamlined way, and to compute model comparison criteria and various predictive measures so that models can be compared and the model under study can be challenged.     

Conceptualizing Childbearing Ambivalence: A Social and Dynamic Perspective

Childbearing ambivalence is often conceptualized as a state of conflicting desires about having a child that is characteristic of particular individuals or life stages. This study proposes that childbearing ambivalence is dynamic and situational, resulting from the multiple sociocultural frames surrounding childbearing. Using eight waves of prospective data from a population‐based sample of young adults in Malawi, results show that 41% of women and 48% of men are ambivalent about childbearing at some point in the 2.5‐year study. There is limited evidence that ambivalence is related to individual sociodemographic or psychosocial characteristics aside from gender; rather, ambivalence is tied to life course markers such as school enrollment and age. In addition, life course transitions and changes in relationships, health, and economic factors are associated with the onset of ambivalence, supporting the theory that ambivalence is a dynamic state that men and women frequently pass through as their lives and circumstances change.     

Social Representational Communities and the Imagined Antebellum South

Tourists come to museums with varied expectations and leave appreciating different aspects of their presentations. Thus, tourists/audiences are primed to see, hear, and experience certain representations and narratives when they enter museums. This is particularly so with plantation museums. Most Americans possess at the very least a vague sense of the antebellum South. They have a vague sense of a time and of a place populated by wealthy and esteemed plantation owners and their Black enslaved labor. We use, as our raw material, visitors’ responses to the question: “What is your level of interest in ...,” ten topics related to plantations’ presentations. This question was asked of visitors returning from tours at three plantation museums. Specifically, all three differ in their presentation of enslavement and as so, have been selected to represent the spectrum of plantation museums in regards to presentation of slavery and enslaved labor. It is expected that the differences in presentations at the three sites reflect differences in plantation audiences. To this effect, plantation audiences are mapped and viewed through the framework of social representation theory in an attempt to discern social representation communities using visitors’ levels of interest in topics/items presented on plantation tours at sites. Disregarding incidental cultural tourists, we found there to be basically two social representations that visitors to these three plantation museums hold: a nostalgic social representation and a Janus social representation.     

Framing the Women’s March on Washington: Media coverage and organizational messaging alignment

Half a million citizens participated in the Women’s March on Washington the day after President Trump’s inauguration, starting a political movement. The march communicated key messages to the public directly and via the media. This study explores how media coverage framed those key messages through content analysis. Media frames mentioned all key messages, emphasizing solidarity and activation at the grassroots, and in a way that both supported and challenged organizational messages. Theoretical and practical implications are discussed.     

Segregation and protectionism: Institutionalised views of Aboriginal rurality

Rurality is a complex and contested term, with multiple notions and gazes amid calls for theoretical pluralism. In Australia, the spatial categories of ‘remote’, ‘rural’, ‘regional’ and ‘urban’ are applied to places that vary in their distance from an economic and political core and have differing population densities. We argue that natural resources institutions in rural Australia demand an ‘authentic’ performance of Aboriginality that is framed within orthodox and stable constructions of an Indigeneity associated with the remote category. Dominant representations of remote Aboriginal people living on traditional homelands and engaged in ‘traditional’ environmental protection are assumed to hold for all places and transposed when natural resources institutions satisfy compulsory Indigenous engagement. Such institutional requirements for authenticity exclude alternative and multiple Indigenous voices in natural resources management. Rather, Aboriginal people seek engagement across a portfolio of natural resources activities typically found in rural areas (such as mining, grazing, forestry, water allocation planning, and natural resources service delivery and enterprise development), and not just isolated in natural and cultural heritage conservation. This broad participation would more completely match their expressed aspirations and the multiple lived realities of their fluid and networked rural worlds. Using the rural town of Eidsvold in Australia as a case study, we discuss the findings of participant observation and semi-structured interviews with Indigenous people at regional natural resources management meetings and at ‘home’ in Eidsvold. Rather than a generic institutional approach, a place-based approach to understanding the complex ruralities of Aboriginal people is needed.     

Stakeholder perceptions of contextual factors related to PBIS implementation in high need schools

Positive behavior intervention and supports (PBIS) is a thoroughly researched three-tiered framework for preventing and treating challenging behavior in schools. While more than 20 years of research contribute to the literature base, less is known about PBIS implementation in high-needs school settings, particularly those that serve students predominantly from low-income families and majority minority student populations across urban and rural districts. This study investigated the critical contextual factors of PBIS implementation from the stakeholder perspective. Specifically, we surveyed 161 participants including teachers, school staff members, and administrators who were PBIS team members and had received technical assistance in PBIS implementation. The completed surveys were analyzed with participants and their schools coded for district type, Title I funding, and position in order to determine how the perceptions of issues such as buy-in, administrator support, PBIS in secondary school settings, and poverty affect PBIS implementation and team needs. The factor analysis and resulting structure along with statistically significant results for each factor are presented along with implications.     

Recent Social Work Practitioners’ Understanding and Use of Evidence-Based Practice and Empirically Supported Treatments

The aim of this study was to evaluate how CSWE’s 2008 shift placing more emphasis on research have affected newly trained social workers’ use of evidence-based practice (EBP). This qualitative study examined the educational and practice experiences of newly trained social workers and how those experiences influence the use of EBP and empirically supported interventions/treatments in the field. Thirteen newly graduated social workers were interviewed using a semi-structured interview. Twenty-three codes emerged from the interviews, with the most prominent theme being a sense of overall confusion about EBP. Other themes included lack of educational preparation, lack of agency resources, and prohibitive agency culture. Implications for social work education and practice are discussed.     

Availability of Mental Health Services for Individuals Who Are Deaf or Deaf-Blind

A survey of state mental health agencies found that a majority have no specific policy or procedure regarding how to provide mental health services to persons who are deaf or who are deaf-blind. Agency representatives report that staff lack knowledge of how to provide mental health services to persons who are deaf-blind and the agencies lack qualified interpreters. They recommend training for social workers and counselors to address best practices in working with people who are deaf-blind concerning communication methods and strategies, physical interaction, cultural issues, everyday life, sensory deprivation, ethics, use of an interpreter, and other general issues.     

The Mental Health Advantage of Immigrant‐Background Youth: The Role of Family Factors

Children of immigrant background, despite problems with acculturation, poverty, and discrimination, have better mental health than children of native parents. We asked whether this is a result of immigrant families' characteristics such as family structure and relations. Using a new comparative study on the integration of immigrant‐background youth conducted in England, Germany, the Netherlands, and Sweden (N = 18,716), particularly strong associations with mental health (internalizing and externalizing problems) were found for family structure, family cohesion, and parental warmth. Overall, half of the advantage in internalizing and externalizing problems among immigrant‐background youth could be accounted for by our measures of family structure and family relations, with family cohesion being particularly important.