On the functional form of temporal discounting: An optimized adaptive test

The tendency to discount the value of future rewards has become one of the best-studied constructs in the behavioral sciences. Although hyperbolic discounting remains the dominant quantitative characterization of this phenomenon, a variety of models have been proposed and consensus around the one that most accurately describes behavior has been elusive. To help bring some clarity to this issue, we propose an Adaptive Design Optimization (ADO) method for fitting and comparing models of temporal discounting. We then conduct an ADO experiment aimed at discriminating among six popular models of temporal discounting. Rather than supporting a single underlying model, our results show that each model is inadequate in some way to describe the full range of behavior exhibited across subjects. The precision of results provided by ADO further identify specific properties of models, such as accommodating both increasing and decreasing impatience, that are mandatory to describe temporal discounting broadly.     

Parental military service and adolescent well‐being: mental health,social connections and coping among youth in the USA

The association between parental military work factors and adolescent's well‐being was examined. Data were collected from 1036 military youth. Using a within‐group design, we examined adolescent's well‐being related to parental absence, school and neighbourhood transitions, paygrade/rank and participation in military‐sponsored activities, and differentiated outcomes by sex and age. Two parental work factors primarily influenced adolescent's well‐being, parental paygrade/rank and engagement in military‐sponsored activities. Parental paygrade/rank was the only factor uniformly related to poorer well‐being, and this variable likely represents a more complex set of family circumstances. Engaging in military‐sponsored activities served as a resource and was related to enhanced well‐being. Individual‐level differences and implications for social workers are discussed.     

A comparison of estimation procedures for the parameters of the star model

A simulation experiment compares the accuracy and precision of three alternate estimation techniques for the parameters of the STARMA model. Maximum likelihood estimation, in most ways the "best" estimation procedure, involves a large amount of computational effort so that two approximate techniques, exact least squares and conditional maximum likelihood, are often proposed for series of moderate lengths. This simulation experiment compares the accuracy of these three estimation procedures for simulated series of various lengths, and discusses the appropriateness of the three procedures as a function of the length of the observed series.     

Methods for estimating proportions of convex combinations of normals using linear feature selection

Let X be a random n-vector whose density function is given by a mixtur.e of two density functions, h₁ and h₂ with unknown mixture proportions, Y₁ and Y₂ We assume that each of h₁ and h₂ is a convex combination of known multivariate normal density functions whose corresponding mixture proportions are also unknown. We present three numerically tractable methods for estimating Y₁ and Y₂ related to the technique of Guseman and Walton (1977), and based on the linear feature selection technique of Guseman, Peters and Walker (1975).     

A Double Multivariate Exponentially Weighted Moving Average (dMEWMA) Control Chart for a Process Location Monitoring

A new control scheme, dMEWMA, for detecting shifts in the mean vector of multivariately normally distributed quality characteristics is presented. It is shown that the ARL performance of dMEWMA depends on the mean and variance-covariance matricies only through the non-centrality parameter value. Through Monte Carlo simulations, the performance of dMEWMA for detecting various shifts is compared to the competing control schemes, MEWMA and Hotelling's χ². It is concluded that dMEWMA outperforms MEWMA and Hotelling's χ² control schemes for small and larger shifts. In comparison to MEWMA control schemes, dMEWMA schemes are optimal for larger values of the smoothing parameter λ and perform much better for very small shifts in the process mean. Finally, an example to illustrate the construction of the dMEWMA control scheme is introduced.     

Conceptualizing the Scholarship of Teaching and Learning for Social Work Education

The scholarship of teaching and learning (SoTL) has become a significant social movement. The newest Educational Policy and Accreditation Standards of the Council on Social Work Education explicitly identify SoTL as important in advancing social work education. This article considers social work education’s role, relationship, and responsibility in relation to SoTL. Providing a critical understanding of SoTL’s background, the article summarizes SoTL’s history and current status. Next, we explain the rationale for social work education to focus on SoTL. Then, the article provides pragmatic steps and strategies for performing SoTL. The article concludes with a discussion of specific recommendations for social work education in moving forward in the SoTL movement.     

Critical rhetoric’s truth-telling function

The relationship between rhetoric and philosophy reveals competing orientations that guide what a subject can say about a domain of things and how that saying is informed by discourses of truth. In this article, I consider Raymie E. McKerrow’s admirable rendering of a “critical rhetoric” alongside Michel Foucault’s examination of parrhēsia to locate in critical rhetoric a truth-telling function that is formed in the ethopoetic relationship between subjects immersed in public discourse.     

The Effect of Social Work Education and Self-Esteem on Students' Social Discrimination of People with Disabilities

Social work education on disability content has become more important due to political changes in the last two decades. The United States protected people with disabilities from discrimination in community and employment settings with the enactment of the Americans with Disabilities Act of 1990. These changes have empowered people with disabilities to become more independent; however, social workers primarily fulfill roles as case managers, and often make decisions for people with disabilities. This is not consistent with the empowerment perspective embedded in the disability movement. Most social work schools have minimal courses covering disability content. Previous research and the Self-Esteem Hypothesis indicate that social work education, social proximity to people with disabilities, self-esteem and other demographic characteristics are associated with social discrimination, or attitudes, toward people with disabilities. Social work students (n = 73) participated in a survey in the last semester of their program to assess how these characteristics were associated with their attitudes towards people with disabilities. A multiple linear regression revealed that social work education preparedness to work with people with disabilities, an MSW education, self-esteem, and having a friend with a disability were significantly associated with students' social discrimination towards people with disabilities.