Comparison of the accuracy of multiple binary tests in the presence of partial disease verification

In the presence of partial disease verification, the comparison of the accuracy of binary diagnostic tests cannot be carried out through the paired comparison of the diagnostic tests applying McNemar's test, since for a subsample of patients the disease status is unknown. In this study, we have deduced the maximum likelihood estimators for the sensitivities and specificities of multiple binary diagnostic tests and we have studied various joint hypothesis tests based on the chi-square distribution to compare simultaneously the accuracy of these binary diagnostic tests when for some patients in the sample the disease status is unknown. Simulation experiments were carried out to study the type I error and the power of each hypothesis test deduced. The results obtained were applied to the diagnosis of coronary stenosis.     

La escala «directiveness» de Ray y el autoritarismo

Resumen

La escala «directiveness» de Ray (1976) es uno de los instrumentos diseñados para la medición del autoritarismo. En este trabajo se estudia la relación de esta medida con el dogmatismo, orientación política, edad y sexo, variables de interés en el campo de las actitudes socio-políticas, los resultados obtenidos nos permiten concluir que la escala «directiveness» no es ütil para el fin pretendido. También se subraya la necesidad de proceder a un debate teórico más riguroso en torno al autoritarismo político.     

The impact of serial transitions on behavioral and psychological problems among children in child protection services

This study focuses on the impacts of serial transitions on externalized and internalized behavior disorders, anxiety, and depression among children in child protection services. The research was carried out with a sample of 741 children. The findings demonstrate that the number of times a family is blended is a stronger predictive factor for children's adjustment than is the family structure at the time of the interview. In predicting externalized and internalized behavior problems among children, however, the effect of family structure disappears in favor of the variables associated with family functioning and family climate.     

Dysfunctional sexual beliefs as vulnerability factors to sexual dysfunction

The differences on sexual beliefs presented by men and women with sexual dysfunction and their sexually functional counterparts were investigated. A total of 488 participants (160 females and 232 males without sexual problems and 47 females and 49 males with a DSM-IV diagnosis of sexual dysfunction) answered the Sexual Dysfunctional Beliefs Questionnaire. Findings showed that, although effects have only reached statistical significance for the female group, both dysfunctional men and women endorsed more sexual dysfunctional beliefs than functional. Women presented significantly more age related beliefs (after menopause women loose their sexual desire, as women age, the pleasure they get from sex decreases) and body image beliefs (women who are not physically attractive cannot be sexually satisfied). Additionally, sexually dysfunctional males presented higher scores (not statistically significant) on 'macho' belief (a real man has sexual intercourse very often) and the beliefs about women satisfaction (the quality of the erection is what most satisfies women). Overall, findings support the idea that sexual beliefs may play a role as vulnerability factors for sexual dysfunction.     

Work and Sexual Trajectories Among African American Youth

The beneficial or deleterious effects of employment on youth and well-being have been highly contested. This study explores whether work influences youths' sexual risk correlates in a sample of African Americans (N = 562; 55% females; M = 14.5 years, SD = 0.6 years) followed longitudinally from adolescence to early adulthood. The study used growth curve modeling to test the association between number of hours worked and condom use, sex partners' age differences, and number of partners over time. Working a greater number of hours was associated with less condom use, with the effect varying by youths' grade point average. Working a greater number of hours was associated with older sex partners among female youth. No association was found between work and number of partners. The findings suggest that working during adolescence and early adulthood increased participants' sexual activity, thus lending some support for the work consequences perspective. The implications for future research and youth development programs are discussed.     

Measuring power and satisfaction in societies with opinion leaders: an axiomatization

Opinion leaders are actors who have some power over their followers as they are able to influence their followers’ choice of action in certain instances. In van den Brink et al. (Homo Oeconomicus 28:161–185, 2011) we proposed a two-action model for societies with opinion leaders. We introduced a power and a satisfaction score and studied some common properties. In this paper we strengthen two of these properties and present two further properties, which allows us to axiomatize both scores for the case that followers require unanimous action inclinations of their opinion leaders to follow them independently from their own action inclinations.     

Evaluation of a Seven State Criminal History Screening Pilot Program for Long-Term Care Workers

This article summarizes results from an evaluation of a federally sponsored criminal history screening (CHS) pilot program to improve screening for workers in long-term care settings. The evaluation addressed eight key issues specified through enabling legislation, including efficiency, costs, and outcomes of screening procedures. Of the 204,339 completed screenings, 3.7% were disqualified due to criminal history, and 18.8% were withdrawn prior to completion for reasons that may include relevant criminal history. Lessons learned from the pilot program experiences may inform a new national background check demonstration program.     

JUNO (JASON REITMAN, 2007): A PRACTICAL CASE STUDY OF TEENS,FILM AND CULTURAL STUDIES

Jason Reitman's Juno (2007), the story of how a teenager handles her pregnancy, is the kind of film that leaves no one indifferent. Released at a time of conflicting discourses on sexual education, Reitman's film addressed the confusion experienced by teenagers as they came of age in a context where patterns of masculine and feminine behaviour were rapidly changing. In this essay I argue that Juno offers a complex understanding of the disorientation suffered by adolescents during the 1990s – a time when anti-sex discourses coexisted with an increasingly sexualized youth culture. This said, my intention is to move towards the film in a roundabout way by focusing, first, on why so many, supposed ‘cultural criticisms’ of films turn out to be so superficial. In this introductory section, the argument will be made for an approach in film analyses that takes full account of cinema as a visual medium. After exposing my critical stance, I shall draw nearer to the film itself by examining various of the overlapping contexts that, together, created a conducive space for its success – namely, the political scene; changing attitudes towards sex and gender; and most importantly, cinema's aesthetic dimension and the impact of genre conventions in the film-viewing experience. Once the complex diagram of differing (and sometimes contradictory) forces at work in Juno has been mapped out, my aim is to link these conjunctures to a detailed analysis of a key scene in the film as a means of demonstrating how the combination of film studies and Cultural Studies can operate as a method that eschews too easy, ideologically oriented, assumptions.