Numerical computation of bridge probabilities

This paper contains an analysis of the problem of computing the joint probability density of the honor card point count in each of four hands in the game of bridge. Efficient representation of the data is considered. Computational algorithms are given for dealing with a compressed form of the density. From the joint density, the densities of the point count in the best and worst hands are obtained. Also obtained is the conditional distribution that a partnership has m points given that one of the partners has n1 points.     

Understanding the relative influence of attitudes and societal norms on dietary intentions among African-Caribbean women

This study applies the theory of reasoned action (TRA) to understand the relative influence of personal attitude (AT) toward three chronic diseases (diabetes, heart disease, and hypertension), and social normative (SN) groups (family, friends, and church), toward intention to engage in dietary behaviors associated with obesity and chronic disease risk. The sample consists of N = 183 women, aged 18–55 years, in Barbados, West Indies, selected through a stratified cluster sample technique. The instrument includes demographic and anthropometric variables and components of the TRA. Analyses using structural equation modeling (SEM) indicate that the TRA explains 22%, 35% and 19% of the variances in intention to consume high-fat foods, alcohol, and fruits, nuts and vegetables, respectively. SN is a predictor of all three dietary intentions, while AT predicts only intention to eat fruit, nuts, and vegetables. In the models, social pressure from family is relatively more important than friends and church in influencing dietary intentions. It can be concluded that social normative influences have a stronger effect on intentions to consume fatty foods, alcohol, and fruit, nuts and vegetables than do personal attitudes.     

Health-enhancing physical activity during practice among student football managers at a Division I university

Abstract

Objective: Student football managers have demands on their time that may pose barriers to meeting recommended current physical activity (PA) guidelines. The study sought to assess the amount of PA obtained by student football managers at a NCAA Division I Football university. Participants: Subjects were student football managers (n?=?14) with data collected in the fall 2015. Methods: Participants wore an Omron HJ-720ITFFP pedometer for seven consecutive days during football activities only, while self-reporting their overall PA on day 7. Measures were analyzed using repeated measures and mixed-design ANOVAs. Results: Managers averaged 8474 steps/day for each practice/game. All PA measures significantly varied by day and manager experience. Overall PA equated to 78?hours of walking. Conclusions: Student football managers easily met and surpassed the recommended aerobic health-enhancing PA guideline. While their manager-related PA was 140?minutes per week, other PA allowed them to easily reach significantly healthy levels of PA.     

Correlates of Engaging in Survival Sex among Homeless Youth and Young Adults

Using a sample of 1,625 homeless youth and young adults aged 10 to 25 from 28 different states in the United States, this study examines the correlates of having engaged in survival sex. Findings suggest that differences exist based on demographic variables (gender, age, race, and sexual orientation), lifetime drug use (inhalants, Valium?, crack cocaine, alcohol, Coricidin?, and morphine), recent drug use (alcohol, ecstasy, heroin, and methamphetamine), mental health variables (suicide attempts, familial history of substance use, and having been in substance abuse treatment), and health variables (sharing needles and having been tested for HIV). In addition to replicating previous findings, this study's findings suggest that African American youth; gay, lesbian, or bisexual youth; and youth who had been tested for HIV were significantly more likely to have engaged in survival sex than White, heterosexual youth, and youth who had not been tested for HIV, respectively. Implications for interventions with youth and suggestions for future research are discussed.     

Queer Is the New Black? Not So Much: Racial Disparities in Anti-LGBTQ Discrimination

The present study examines the intersection of race and sexual orientation in the experience of discrimination among lesbian, gay, bisexual, transgender, and queer (LGBTQ) people. The results of the study suggest that while a majority of LGBTQ individuals report being victims of anti-LGBTQ discrimination, racial minorities experience even greater levels of anti-LGBTQ discrimination than do White LGBTQ people. The findings suggest that the intersection of race and sexual orientation creates elevated levels of discrimination risk beyond the already elevated rates of discrimination experienced by members of the LGBTQ community for LGBTQ racial minorities.     

On the approximability of Time Disjoint Walks

Journal of Combinatorial Optimization - We introduce the combinatorial optimization problem Time Disjoint Walks (TDW), which has applications in collision-free routing of discrete objects (e.g.,...     

The influence of follower mood on leader mood and task performance: An affective,follower-centric perspective of leadership

Based on the notion that leadership involves affective exchange (Dasborough, Ashkanasy, Tee & Tse, 2009), we hypothesize that a leader's mood and task performance can be determined in part by follower mood displays. In two laboratory experiments, leaders supervised teams where the team members were confederates instructed to display positive or negative moods. Results were that followers' mood influenced leader mood and task performance. Moreover, leaders of positive mood followers were judged to have performed more effectively and expediently than leaders of followers who expressed negative mood states. We replicated these findings in Study 2 and found further that leaders high on neuroticism performed less effectively than their low neuroticism counterparts when interacting with negative-mood followers. Collectively, by demonstrating that follower moods influence leader affect and behaviors, our studies provide support for a core element of the Dasborough et al. (2009) reciprocal affect theory of leadership.     

Learning in organizations: HR implications and considerations

This paper looks at learning in organizations as one response to competitive pressure and accelerating environmental change. Two approaches, the learning organization and HRD, are examined in the light of new models of management and learning and a move towards the integration of work, learning, and strategy. The significance of employee participation is considered in relation to learning and some benefits and drawbacks discussed. The development of a learning orientation is seen as an organization-wide responsibility but HR practitioners can play a key role in the promotion of learning by gearing the more traditional HR activities towards the achievement of organizational goals.     

Role of Cognitive Styles in Business and Management: Reviewing 40 Years of Research

In line with increased attention on the application of cognitive approaches to industrial, work and organizational psychology, the last 40 years have witnessed a growing interest in application of the cognitive style construct to the field of business and management. The purpose of this paper is threefold. First, we wish to advance understanding of cognitive styles research by elucidating trends and perspectives related to business and management. Second, we identify gaps in the literature and promising areas of research that can be further developed. This is accomplished by means of a review of papers published between 1969 and 2009. Eight themes emerged from our analysis: (a) vocational and occupational issues; (b) national culture; (c) teamwork and interpersonal relationships; (d) learning; (e) decision making; (f) creativity, innovation and entrepreneurship; (g) sales and marketing; and (h) management information systems, information management and use. Third, we identify valid and reliable methods of assessment of cognitive style for use in business and management settings. Finally we draw a number of conclusions regarding the current state of cognitive styles research and promising directions for future research.     

De Morgan in the prehistory of statistical hypothesis testing

Summary.  Whereas the research of the 19th-century mathematician Augustus De Morgan in formal logic is fairly familiar to historians of mathematics, his work in probability is largely unknown to the modern reader. For this reason, few would be aware that this work contains a self-admitted error in probabilistic reasoning. This mistake is intriguing not only because it features in the work of someone who was so expert in logic but also because it appears to be an early example of hypothesis testing, which was a topic of much controversy in the development of mathematical statistics in the 20th century. The paper examines the mathematical and historical details of De Morgan's error.