A comparison of linear regression techniques in method comparison studies

In this study, the performances of linear regression techniques, which are especially used in clinical chemistry in method comparison studies, are compared via the Monte-Carlo simulation. The regression techniques that take the measurement errors of both dependent and independent variables into account are called Type II regression techniques. In this study, we also compare the performances of Type II and Type I (classical regression techniques that do not take the measurement errors of the independent variable into account) regression techniques for different sample sizes and different shape parameters of the Weibull distribution. The mean square error is used as a performance criterion of each technique. MATLAB 7.02 software is used in the simulation study. As a result, in all conditions, the ordinary least-square (OLS)-bisector regression technique, which bisects the OLS(Y | X) and the OLS(X | Y), shows the best performance.     

Public Perceptions of Florida Red Tide Risks

This research integrates theoretical frameworks of risk perception, social amplification of risk, and the role of place-specific contexts in order to explore the various perceptions surrounding Florida red tides. Florida red tides are naturally occurring events that are increasing in frequency, duration, and severity. This has implications for public health, the local economy, and ecosystem health. While many of the negative impacts of Florida red tides are not easily controlled, some of the secondary impacts may be mitigated through individuals' responses. However, public perception and consequent reactions to Florida red tides have not been investigated. This research uses questionnaire surveys, and semi-structured interviews, to explore the various perceptions of the risk surrounding red tides. Surveys and interviews were conducted along two Florida west coast beaches. The results indicate that the underlying foundations of the social amplification of the risk framework are applicable to understanding how individuals form perceptions of risk relative to red tide events. There are key differences between the spatial locations of individuals and corresponding perceptions, indicating that place-specific contexts are essential to understanding how individuals receive and interpret risk information. The results also suggest that individuals may be lacking efficient and up-to-date information about Florida red tides and their impacts because of inconsistent public outreach. Overall, social and spatial factors appear to be influential as to whether individuals amplify or attenuate the risks associated with Florida red tides.     

How are employees of the nonprofit sector motivated? A research need

This article reviews research on motivation of employees in the nonprofit sector, with a major emphasis on the motivation of teachers and hospital nursing staff. Although both areas are widely researched in the nonprofit sector, empirical motivation research conducted in schools and hospitals is certainly not extensive. Nevertheless, based on these limited research findings, we derive potential hypotheses for future research in schools and hospitals.     

Agency conflicts between board and manager

Detecting agency problems is an important task when assessing the effectiveness of a nonprofit organization's governance. A first step is to examine the objectives of principals and agents and determine whether there is a systematic difference between them. Using a discrete choice experiment, we identify the objectives of board chairpersons (principals) and headmasters (agents) of Flemish nonprofit schools. We find systematic differences between the two groups. Of the seven possible objectives set out in the experiment, six are relevant for both headmasters and board chairpersons. For four of these, the preferences of both groups differ significantly. Whereas ideological values play an important role for both the board and the headmaster, they are significantly more important for the board. Both parties dislike having a large number of pupils, and the disutility is larger for the board. With respect to job satisfaction and pupil satisfaction, we find the opposite: while the board is prepared to give up pupil and job satisfaction in favor of the other objectives, these two objectives score very high on the priority list of the headmasters.     

Providing new opportunities or reinforcing old stereotypes? Perceptions and experiences of single-sex public education

There has been a widespread increase in single-sex public schooling in the U.S. following 2006 changes to the Department of Education regulations motivated by the No Child Left Behind Act of 2001. Single-sex public schooling is viewed as a means to improve the educational experiences and performance of low-income youth of color. Yet little is known about its effects and efficacy, particularly for these populations. This article is based on a community-based participatory research project, on which high school students and university researchers collaborated, conducted in a low-income, African American high school implementing single-sex courses. Our findings challenge proponents' key assumptions that single-sex education will improve the academic achievement of low-income youth of color by 1) eliminating distraction from the other sex; 2) addressing the different learning styles of girls and boys; and 3) remedying inequities by offering these youth opportunities traditionally afforded to more privileged youth. While some distractions were decreased, others were increased or ignored; racialized stereotypes of hypersexuality and essentialized notions of gender were reinforced; and students felt punished rather than privileged by being separated by sex. We conclude that single-sex education as a public school option is a neoliberal approach to addressing low achievement that deflects attention from the structural inequities that created the problem and implicitly blames those experiencing oppression.     

Normal life crises and insanity—mental illness contextualised

According to a 2005 survey, the people of Rosengård, a culturally heterogeneous borough of Malmö, Sweden, utilise considerably less mental health services in relation to their estimated needs than the rest of the city's population. A study based on interviews with people living or working in the area revealed several possible reasons. Most important was their perception of what constitutes mental illness. If the cause of one's disturbed mental state is viewed as a normal life crises rather than an illness, one does not seek medical treatment. The aim of this article is to illustrate how under-utilisation of mental health services by an immigrant population can be explained by their different perceptions of what constitutes mental illness. Interventions should add concerns regarding a client's socio-economic and psychosocial needs, rather than solely follow a medical model.     

The Impact of Work and Volunteer Hours on the Health of Undergraduate Students

Abstract

Objective: To examine the impact of work and volunteer hours on 4 health issues among undergraduate college students. Participants: Full-time undergraduate students (N = 70,068) enrolled at 129 institutions who participated in the Spring 2011 American College Health Association–National College Health Assessment II survey. Methods: Multiple linear regression and binary logistic regression were used to examine work and volunteer hour impact on depression, feelings of being overwhelmed, sleep, and physical activity. Results: The impact of work and volunteer hours was inconsistent among the health outcomes. Increased work hours tended to negatively affect sleep and increase feelings of being overwhelmed. Students who volunteered were more likely to meet physical activity guidelines, and those who volunteered 1 to 9 hours per week reported less depression. Conclusions: College health professionals should consider integrating discussion of students' employment and volunteering and their intersection with health outcomes into clinical visits, programming, and other services.     

Islamic perspectives in social work education: Implications for teaching and practice

In the field of further education, social work is beginning to be accepted as an academic and vocational discipline in many countries across the world. Indigenous practice has greatly contributed to a plurality of perspectives adding to diversity of social work knowledge and adding new facets to traditional social work values and interventions. The authors predict that the current dearth of academic material on Islamic perspectives in social work will be more fully addressed in the near future. In the meantime, a personal viewpoint of the dilemmas and ambiguity in social work education in the Islamic context of Malaysia is offered.     

Playing with Sims as a Space of One's Own

Studies of women's use of popular media have highlighted how these contested genres may be used by women to create a space of their own. Is this also the case when the media text in question is a digital game and the community around it moves online? Investigated via a netnographic approach, this article analyses the articulated experiences of playing The Sims 2 and The Sims 3 in relation to how the players perceive the activity's function in their everyday lives. Seven emic categories are identified and discussed in the inductive analysis, namely “relaxation and dealing with stress,” “playing according to mood,” “managing and taking control,” “experimentation,” “get what one does not have,” “making something one's own,” and “creative outlet.” A central denominator of these seven categories is the notion of a space of one's own in the widest sense of the phrase. In the discussed accounts playing becomes a way not only to escape other obligations for a while but also in various ways to work with the self and its place in everyday life.