Binomial confidence limits adjusted for a confounding variable

A simple transformation of classical binomial confidence limits provides exact confidence limits in situations where a confounding variable is present. An example is the multiple-choice test, where a correct answer may represent either knowledge or guesswork, the latter being the confounding variable.     

New tests for stochastic order with application to case control studies

It is shown that if a binary regression function is increasing then retrospective sampling induces a stochastic ordering of the covariate distributions among the responders, which we call cases, and the non-responders, which we call controls. We also show that if the covariate distributions are stochastically ordered then the regression function must be increasing. This means that testing whether the regression function is monotone is equivalent to testing whether the covariate distributions are stochastically ordered. Capitalizing on these new probabilistic observations we proceed to develop two new non-parametric tests for stochastic order. The new tests are based on either the maximally selected, or integrated, chi-bar statistic of order one. The tests are easy to compute and interpret and their large sampling distributions are easily found. Numerical comparisons show that they compare favorably with existing methods in both small and large samples. We emphasize that the new tests are applicable to any testing problem involving two stochastically ordered distributions.     

Clinical Care of Gambling Disorders: Training, Experience, and Competence Among VHA Psychologists

Problem gambling is a common, highly destructive disorder which is often overlooked by clinicians. Levels of clinical training, clinical experience, and professional competence for providing clinical services for problem gambling were examined in a survey of 181 clinical psychologists working in the Veterans Healthcare Administration (VHA). The results suggest that the majority of clinical psychologists have little or no formal training and little or no past or current clinical experience in the treatment of disordered gambling, nor do they see themselves as competent to evaluate or treat patients with disordered gambling. Most have not referred patients for treatment of problem gambling and do not know of a competent provider to whom they can refer. There is an identifiable subgroup, representing 9% of respondents, who do have more training, provide services, and see themselves as competent to provide care for patients with problem gambling. The amount of formal training is positively correlated with care provided and self-ratings of competence. Despite the lack of training and experience, most respondents expressed interest in receiving additional training. These data suggest that to improve rates of diagnosis and treatment of patients with problem gambling in mental health settings, additional training needs to be made available for mental health providers as a group, with specialized training for clinicians interested in specializing in this area.     

Cambodian youth managing expectations and uncertainties of the life course – a typology of biographical management

Globalising changes in recent decades have produced great impacts on young lives, and youth sociologists have been analysing how young people negotiate change and uncertainty in their lives. This article complements existing research by a case study on Cambodia, where young people have in recent years been charged to deal with drastic social changes but in social conditions different from the better known global North. By drawing on data from a study of young rural–urban migrant labour workers' and university students' life experiences and expectations in the Cambodian capital of Phnom Penh, we systematically compare their sense making, action strategies and future orientation during their transition into working life. We present a theoretically informed but empirically grounded typology that illustrates three major modes of biographical management: entrepreneurial, traditional and situational, which are linked to different perceptions of uncertainty, future perspectives, action strategies, planning modes and resources available through the family, personal capacity and the larger sociocultural context. We conclude with critical remarks on the extent to which the fulfilment of Cambodian young people's hopes for a better life is shaped by broader social conditions and individual circumstances.     

Assessment of Inhalation Exposures and Potential Health Risks to the General Population that Resulted from the Collapse of the World Trade Center Towers

In the days following the collapse of the World Trade Center (WTC) towers on September 11, 2001 (9/11), the U.S. Environmental Protection Agency (EPA) initiated numerous air monitoring activities to better understand the ongoing impact of emissions from that disaster. Using these data, EPA conducted an inhalation exposure and human health risk assessment to the general population. This assessment does not address exposures and potential impacts that could have occurred to rescue workers, firefighters, and other site workers, nor does it address exposures that could have occurred in the indoor environment. Contaminants evaluated include particulate matter (PM), metals, polychlorinated biphenyls, dioxins, asbestos, volatile organic compounds, particle-bound polycyclic aromatic hydrocarbons, silica, and synthetic vitreous fibers (SVFs). This evaluation yielded three principal findings. (1) Persons exposed to extremely high levels of ambient PM and its components, SVFs, and other contaminants during the collapse of the WTC towers, and for several hours afterward, were likely to be at risk for acute and potentially chronic respiratory effects. (2) Available data suggest that contaminant concentrations within and near ground zero (GZ) remained significantly elevated above background levels for a few days after 9/11. Because only limited data on these critical few days were available, exposures and potential health impacts could not be evaluated with certainty for this time period. (3) Except for inhalation exposures that may have occurred on 9/11 and a few days afterward, the ambient air concentration data suggest that persons in the general population were unlikely to suffer short-term or long-term adverse health effects caused by inhalation exposures. While this analysis by EPA evaluated the potential for health impacts based on measured air concentrations, epidemiological studies conducted by organizations other than EPA have attempted to identify actual impacts. Such studies have identified respiratory effects in worker and general populations, and developmental effects in newborns whose mothers were near GZ on 9/11 or shortly thereafter. While researchers are not able to identify specific times and even exactly which contaminants are the cause of these effects, they have nonetheless concluded that exposure to WTC contaminants (and/or maternal stress, in the case of developmental effects) resulted in these effects, and have identified the time period including 9/11 itself and the days and few weeks afterward as a period of most concern based on high concentrations of key pollutants in the air and dust.     

Permutation tests — A revival?!

It is shown that permutation tests have optimum properties for interesting classes of continuous distributions as well as for discrete ones. General conditions sufficient for uniformly maximal power on subclasses are given. Moreover, a variety of examples is presented. Research supported by Deutsche Forschungsgemeinschaft (DFG) grant No. Schm 677/5-1     

Popular sovereignty and the historical origin of the social movement

This article seeks to explain why the social movement had its historical origin in the 1760s. It argues that the rise of the social movement as a particular form of political action was closely linked to a new interpretation of sovereignty that emerged within eighteenth century British politics. This interpretation, which drew inspiration from Jean-Jacques Rousseau??s social contract thinking, not only resonated with the radicalism of John Wilkes and his followers?? struggle to promote civil liberties to Englishmen of all classes, it also spurred a transformation of the repertoire of popular contention. The article traces the evolution of the concept of sovereignty in British political thought from the Restoration to the Wilkites and discusses how this evolution informed the contentious actions of the Wilkites as they formed the first mass movement to promote a specific political issue.