An Algorithm for Unconstrained Quadratically Penalized Convex Optimization

Estimators are often defined as the solutions to data dependent optimization problems. A common form of objective function (function to be optimized) that arises in statistical estimation is the sum of a convex function V and a quadratic complexity penalty. A standard paradigm for creating kernel-based estimators leads to such an optimization problem. This article describes an optimization algorithm designed for unconstrained optimization problems in which the objective function is the sum of a non negative convex function and a known quadratic penalty. The algorithm is described and compared with BFGS on some penalized logistic regression and penalized L ^3/2 regression problems.     

Detection of Multiple Outbreaks Using Spatio-Temporal EWMA-Ordered Statistics

Spatio-temporal surveillance methods for detecting outbreaks of disease are fairly common in the literature with the scan statistic setting the benchmark. If the shape and size of the outbreaks are known in advance, then the scan approach can be designed to efficiently detect these, however, this is seldom true. Therefore we want to devise plans that are efficient at detecting a number of outbreaks that vary in size and shape. This paper examines plans which use the exponential weighted moving average statistic to build temporal memory into plans and tries to develop robust plans for detecting outbreaks of unknown shapes and sizes.     

Play in Mexican‐American mothers and toddlers is frequent,multimodal, and rich in symbolic content

Play offers rich opportunities for toddlers to develop motor, social, cognitive, and language skills, particularly during interactions with adult caregivers who may scaffold toddlers to higher levels of play than toddlers achieve on their own. However, research on play has narrowly focused on children from White, middle‐income backgrounds, leaving a dearth of knowledge about dyadic play in diverse cultural communities. We videorecorded 222 Mexican‐American mothers playing with their 2‐year‐old toddlers with a standard set of toys. Play behaviors were coded as nonsymbolic or symbolic (play type) and as expressed through manual, verbal, or multiple channels (play modality). Play between toddlers and mothers was frequent, high in symbolic content, and toddler play closely corresponded with mother play in type and modality: Toddlers’ nonsymbolic play related to mothers’ nonsymbolic play; toddlers’ symbolic play related to mothers’ symbolic play; toddlers’ manual play related to mothers’ manual play; and toddlers’ multimodal play related to mothers’ multimodal play. Play in Mexican‐American mothers and toddlers is frequent, multimodal, and symbolically rich, offering new directions for future research and practice.     

Factor Structure and Reliability of the Advantages of Children Scale with Latino and Caucasian Male Emerging Adults

Abstract

Based on the value of children theory, the purpose of this study was to develop and establish the factor structure and internal consistency reliability of the Advantages of Children Scale (ACS), a self-report measure of a modification of Hoffman and Hoffman’s value scheme of the psychological needs children meet for their parents. Data were collected from 685 emerging adult men identifying as Latino or Caucasian who were not parents. Results of the confirmatory factor analysis found a good fit for the six hypothesized subscales on the ACS: connectedness, expansion of self, family heritage, adult status and social identity, development of self, and family maintenance. We discuss potential applications of the measure in research and practice.     

Facilitation and Dialogue as Methods of Reflective Practice in Professional Education

Students may fear sharing their learning in public because classrooms are not traditional places where we teach skills needed for mutual understanding, such as facilitation and dialogue. This is a pedagogical challenge for planning, policy, and design fields because contemporary teaching requires collaboration among participants. We propose that learning to work collaboratively in the classroom has broader relevance for practice because it mirrors the learning that happens in organizations. To address this opportunity, we trained students in facilitation and dialogue. In this article, we discuss the design, implementation, and outcomes of this intervention.     

Adolescent Perceptions of Interparental Conflict, Stressors, and Coping as Predictors of Adolescent Family Life Satisfaction

Using family stress theory, this study examined the relationship between adolescent reports of selected demographic variables (gender, age, family form), interparental conflict (style, content, intensity, resolution), stress due to the pileup of stressors, coping strategies (social support, detrimental coping), and adolescent family life satisfaction. The sample was comprised of 155 adolescents ranging from 14 to 18 years of age who completed self-report questionnaires at one of three rural Oklahoma high schools. Four dimensions of interparental conflict (overt conflict style, conflict about childrearing, conflict about family roles/finances, conflict resolution), stress due to pileup, social support coping, and detrimental coping were significantly related to family life satisfaction. Adolescent age was positively related to family life satisfaction. Within the scope of family stress theory, scholars have addressed how the combination of stressors and coping strategies relates to the adaptation of individuals within family systems (McCubbin and Patterson 1983). Further, investigations of the relationship of parental divorce to well-being in children and adolescents suggest that interaction patterns within various family forms may be more fruitful in explaining the adaptation of youth than parental marital status (Demo 1992). The perception by youth of conflict between their parents (i.e., interparental conflict) has emerged as a key family stressor that has the potential to explain variation in adolescent adaptation in a variety of family forms (Buehler, Krishnakumar, Anthony, Tittsworth, and Stone 1994). Stressor events for adolescents such as interparental conflict generally do not occur in isolation. Rather, they exist within the context of other stressors such as economic stress, difficulties at school, or normative developmental tasks for families with adolescents (e.g., changing family roles to allow greater adolescent autonomy; McCubbin and Patterson 1986). Further, considerable variation exists in the coping strategies (e.g., social support, avoidance) that adolescents use in response to stress (McCubbin and Patterson 1986). Finally, previous research shows variation between certain demographic variables and adolescent adaptation. Thus, the current study was developed to examine how selected demographic variables (gender, age, family form), adolescent perceptions of interparental conflict (style, content, intensity, degree of resolution), stress based on the pileup of stressor events, and coping strategies relate to adolescent satisfaction with family life (one indicator of adaptation).