The turning arcs: a computationally efficient algorithm to simulate isotropic vector-valued Gaussian random fields on the d-sphere

Statistics and Computing - Random fields on the sphere play a fundamental role in the natural sciences. This paper presents a simulation algorithm parenthetical to the spectral turning bands method...     

Theory of mind as a mechanism linking mother–toddler relationship quality and child–friend interaction during the preschool years

Children's relationships with parents and peers have been examined as predictors and outcomes, respectively, of theory of mind (ToM). Yet, these two lines of inquiry have remained largely distinct. The current study bridges this gap. Mother–child coordinated interaction and attachment security (continuous rating) were assessed at 2.8 years (N = 128 dyads), ToM was assessed at 3.3, 4.8, and 5.4 years, and child–friend interaction was observed at 4.8 and 5.4 years. Controlling for child expressive language ability at 2.8 years, mother–child coordinated interaction predicted more complex child–friend play and less child–friend conflict via more advanced ToM. No indirect effects from attachment security to friendship quality via ToM emerged. Attachment group status (secure vs. insecure), however, moderated ToM‐friendship associations, such that (a) more advanced ToM predicted more socially complex play with friends, and (b) more conflict with friends predicted more advanced ToM, but only for children classified as secure.     

Parental denigration reports across parent–child dyads: Divorced parents underreport denigration behaviors compared to children

Abstract

Parental denigration is a phenomenon characterized by disparaging comments made by one parent about the other parent, in front of their children. It is an emerging area of research with implications that appear to follow from a conflict perspective, rather than a parental alienation perspective. In three prior studies of young adults, sibling pairs, and parents, denigration was found to be (a) measured reliably and validly, (b) reciprocally occurring, (c) related to children feeling more distant from both parents, particularly the more frequent denigrator, (d) associated with various measures of maladjustment, and (e) underreported by divorced parents. These results held across marital status and parent gender, in group and individual analyses, across sibling reports, and across studies. In the current study, parent reports of co-parent denigration behaviors were similar to child reports in both married and divorced families. However, divorced parents consistently underreported their own denigration behaviors compared to child reports, and their reports of parent–child closeness and attachment was not associated with child reports. This is consistent with findings from previous work that divorced parents may be less aware of their harmful behaviors and view co-parents in a globally more negative light than children perceive them.     

Global theory and the nature of risk, Part 2. Towards a choice-based model of managed care

Orthodox managed care depends on top-down, command and control techniques to squeeze efficiency out of the system. But for every unit of economic good this approach produces, two or three bad units come as result. The key to moving to an environment where value and efficiency become self-sustaining is to structurally recognize the medicoeconomic reality of medicine: the episode of care. The episode forms a natural unit of analysis that not only renders costs and outcomes information translucent and accessible, but it also forms the natural conduit through which premium dollars can find their optimal value. By bifurcating probability risk from technical risk and allocating them in the ex ante and ex post markets, respectively, health care insurers and providers return to their rightful economic roles, and to their appropriate fiduciary duties. And patients regain some semblance of reasonable sovereignty in managing their own medical affairs.     

SBIRT Training in Social Work Education: Evaluating Change Using Standardized Patient Simulation

A grand challenge for social work is addressing widespread public health problems of alcohol misuse. MSW students (n = 83) received Screening, Brief Intervention, and Referral to Treatment (SBIRT) training through didactic sessions, role plays, and pre–post videotaped standardized patient (SP) interactions. SBIRT knowledge, self-reported practice behaviors, and confidence were assessed at pretest, 30 days, and 6 months posttest. Videos were coded to assess intervention-adherent behaviors. General linear mixed models analyzed changes. Participants demonstrated increased adherence to SBIRT behaviors, and knowledge, skills, and confidence increased posttraining. Findings suggest SBIRT training increases students’ capacity to implement evidence-based interventions designed to reduce alcohol misuse.     

REVIEWS

Green, S., & Flemons, D. (2004). Quickies: The handbook of brief sex therapy .
Lilienfield, S. O., Lynn, S. J., & Lohr, J. M. (Ed.). (2003). Science and pseudoscience in clinical psychology .
Rastogi, M., & Wieling, E. (Eds). (2005). Voices of color: First-person accounts of ethnic minority therapists .
Sue, D. (2003). Overcoming our racism: The journey to liberation .
Cozolino, L. J. (2002). The neuroscience of psychotherapy: Building and rebuilding the human brain .     

CONTINUOUS-TIME FILTERS FOR STATE ESTIMATION FROM POINT PROCESS MODELS OF NEURAL DATA

Neural spike trains, the primary communication signals in the brain, can be accurately modeled as point processes. For many years, significant theoretical work has been done on the construction of exact and approximate filters for state estimation from point process observations in continuous-time. We have previously developed approximate filters for state estimation from point process observations in discrete-time and applied them in the study of neural systems. Here, we present a coherent framework for deriving continuous-time filters from their discrete-counterparts. We present an accessible derivation of the well-known unnormalized conditional density equation for state evolution, construct a new continuous-time filter based on a Gaussian approximation, and propose a method for assessing the validity of the approximation following an approach by Brockett and Clark. We apply these methods to the problem of reconstructing arm reaching movements from simulated neural spiking activity from the primary motor cortex. This work makes explicit the connections between adaptive point process filters for analyzing neural spiking activity in continuous-time, and standard continuous-time filters for state estimation from continuous and point process observations.