The extended satisfaction with life scale: Development and psychometric properties

The development and psychometric properties of the Extended Satisfaction With Life Scale (ESWLS) are described in detail. The ESWLS is a 50-item self-report scale that measures satisfaction with life in nine domains. It can be completed by most people in under 20 minutes and can be used by researchers and clinicians. The readability of the ESWLS was estimated to be between the seventh and tenth grade levels. Internal consistency, estimated by coefficient α, ranged from 0.81 to 0.96 for the individual subscales. Two-week test-retest reliability coefficients ranged from 0.74 to 0.87. Results of exploratory and confirmatory factor analyses strongly supported the factor structure of the ESWLS. Preliminary evidence of convergent and discriminant validity is provided as well as preliminary norms.     

Evolution and population dynamics in stochastic environments

Inter-generational temporal variability of the environment is important in the evolution and adaptation of phenotypic traits. We discuss a population-dynamic approach which plays a central role in the analysis of evolutionary processes. The basic principle is that the phenotypes with the greatest long-term average growth rate will dominate the entire population. The calculation of longterm average growth rates for populations under temporal stochasticity can be highly cumbersome. However, for a discrete non-overlapping population, it is identical to the geometric mean of the growth rates (geometric mean fitness), which is usually different from the simple arithmetic mean of growth rates. Evolutionary outcomes based on geometric mean fitness are often very different from the predictions based on the usual arithmetic mean fitness. In this paper we illustrate the concept of geometric mean fitness in a few simple models. We discuss its implications for the adaptive evolution of phenotypes, e.g. foraging under predation risks and clutch size. Next, we present an application: the risk-spreading egg-laying behaviour of the cabbage white butterfly, and develop a two-patch population dynamic model to show how the optimal solution diverges from the ssual arithmetic mean approach. The dynamics of these stochastic models cannot be predicted from the dynamics of simple deterministic models. Thus the inclusion of stochastic factors in the analyses of populations is essential to the understanding of not only population dynamics, but also their evolutionary dynamics.     

Technology and Family Dynamics: The Relationships Among Children’s Use of Mobile Devices,Family Atmosphere and Parenting Approaches

Child and Adolescent Social Work Journal - This paper examines how family atmosphere, parental self-efficacy, parenting methods and children’s patterns of mobile device use result in negative...     

Cognitive Algebra in Sport Decision-Making

Two studies examined whether simple algebraic rules that have been shown to be operative in many applied settings may also be found in sport decision-making. The theoretical framework for these studies was the Functional Theory of Cognition (Anderson, Contributions to information integration theory. Hillsdale, NJ: Erlbaum, 1996). The way in which novices but already experienced team sport players (soccer, basketball, and handball players) combine different informational cues (relative importance of the game, numerical status of the team, current score, and time left to play) for deciding a quick restart of play near the end of a match was examined. The basic finding are consistent with the proposition that the knowledge bases at work for judging the appropriateness of this type of sport decisions are structured according to simple algebraic rules.     

Protectionism: An analysis from project LINK

The LINK system of world trade is used to examine present tendencies toward protectionism. In protectionist scenarios we increase the prices of manufactured imports into 13 LINK-OECD countries by 5, 10, and 20 percent respectively, for 1978–1979. If a country's import equations do not depend significantly on relative price, we impose corresponding quantitative import restrictions of 5, 10, and 20 percent. Smaller OECD countries, developing countries, and socialist countries are assumed to be nonprotectionist in these scenarios. The discrepancies between the values of leading variables in the protectionist scenarios and in a baseline case show the effects of the different degrees of protectionism assumed. The results describe and validate Adam Smith's principles of the gains from free trade.     

Reducing Surgical Ward Congestion Through Improved Surgical Scheduling and Uncapacitated Simulation

High surgical bed occupancy levels often result in heightened staff stress, frequent surgical cancellations, and long surgical wait times. This congestion is in part attributable to surgical scheduling practices, which often focus on the efficient use of operating rooms but ignore resulting downstream bed utilization. This paper describes a transparent and portable approach to improve scheduling practices, which combines a Monte Carlo simulation model and a mixed integer programming (MIP) model. For a specified surgical schedule, the simulation samples from historical case records and predicts bed requirements assuming no resource constraints. The MIP model complements the simulation model by scheduling both surgeon blocks and patient types to reduce peak bed occupancies. Scheduling guidelines were developed from the optimized schedules to provide surgical planners with a simple and implementable alternative to the MIP model. This approach has been tested and delivered to planners in a health authority in British Columbia, Canada. The models have been used to propose new surgical schedules and to evaluate the impact of proposed system changes on ward congestion.     

Ethnic differences in symptom presentation of sexually abused girls

Although researchers have begun to examine the issue of ethnic and cultural factors in childhood sexual abuse (CSA), relatively little has been done to look at possible ethnic and cultural differences in psychological symptoms related to CSA. This study investigated the relationship between ethnicity and symptom presentation among Hispanic, African American, and Caucasian sexually abused girls. The study examined the relationship between ethnicity and depression, ethnicity and post-trauma intrusive symptoms, and ethnicity and post-trauma avoidance symptoms. Results indicated that African American girls had significantly higher levels of post-trauma avoidance symptoms than Hispanic girls, but not Caucasian girls. No significant differences were found between ethnic groups for depression or intrusive symptoms.     

Getting the most out of reverse e-auction investment

In 1990s, with dramatic price reductions, reverse e-auctions were projected to be a widely used procurement tool. However, not all buyers saw the economic benefits of reverse e-auctions and the current usage is more limited than expected. This study identifies important organizational characteristics that determine the net return of e-auction programs and addresses why adopters of e-auctions experience varying profitability levels from their usage. The first step in the study concentrated on gathering interview and archival data from five large U.S. manufacturing firms that have used reverse e-auctions. Based on the field study findings, controlled experiments were conducted using a simulation model to assess identified influential factors for e-auctions. Implications for supply managers are presented and future research directions are discussed.     

Staff experience of a new approach to family safeguarding in Oxfordshire Children's Social Care Services

This paper presents the findings from a qualitative study that sought to understand the experiences of frontline staff working in Oxfordshire County Council (OCC) Children's Social Care Services and their views on a new family safeguarding model (Family Solutions Plus). Focus group interviews were conducted with 20 frontline staff and managers in different teams across OCC Children's Social Care Services using video conferencing software. Thematic analysis identified three overarching themes: Preparation for the implementation of Family Solutions Plus, staff views on the implemented model, and challenges to its implementation. Staff voiced strong support for the new model, which places a much greater emphasis than previous practice on supporting the whole family, developing parenting skills and keeping children safe with their families. The challenges associated with the transition to a new model were considerable in the short term, partly due to the COVID-19 pandemic, but there was optimism that the new model could be sustained and stabilized over time.     

Distributed Decisions in Networks: Laboratory Study of Routing Splittable Flow

We study network games in which users choose routes in computerized networks susceptible to congestion. In the “unsplittable” condition, route choices are completely unregulated, players are symmetric, each player controls a single unit of flow and chooses a single origin–destination (O–D) path. In the “splittable” condition, which is the main focus of this study, route choices are partly regulated, players are asymmetric, each player controls multiple units of flow and chooses multiple O–D paths to distribute her fleet. In each condition, users choose routes in two types of network: a basic network with three parallel routes and an augmented network with five routes sharing joint links. We construct and subsequently test equilibrium solutions for each combination of condition and network type, and then propose a Markov revision protocol to account for the dynamics of play. In both conditions, route choice behavior approaches equilibrium and the Braess Paradox is clearly manifested.