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161.
162.
Knowledge concerning the family of univariate continuous distributions with density function f and distribution function F defined through the relation f(x) = F α(x)(1 ? F(x))β, α, β ? , is reviewed and modestly extended. Symmetry, modality, tail behavior, order statistics, shape properties based on the mode, L-moments, and—for the first time—transformations between members of the family are the general properties considered. Fully tractable special cases include all the complementary beta distributions (including uniform, power law and cosine distributions), the logistic, exponential and Pareto distributions, the Student t distribution on 2 degrees of freedom and, newly, the distribution corresponding to α = β = 5/2. The logistic distribution is central to some of the developments of the article.  相似文献   
163.

Background

Recognition of pregnancy-related anxiety as a distinct anxiety is supported by evidence differentiating it from general anxiety and depression. Adverse associations with pregnancy-related anxiety further support this distinction. An influential study by Huizink et al. (2004), demonstrated that anxiety and depression contribute little to the variance of pregnancy-related anxiety, yet this study has not been replicated. Further, addressing limitations of the original study will provide further clarity to the findings.

Methods

Participants (N = 1209), were recruited online and completed three scales: pregnancy-related anxiety, general anxiety and depression. Multiple regression assessed the unique contribution of general anxiety and depression (predictors) to pregnancy-related anxiety scores (criterion) for each trimester.

Results

Across pregnancy, general anxiety and depression explained only 2–23% of the variance in the pregnancy-related anxiety scores. Anxiety and depression showed small unique contributions for some trimesters and specific areas of concern, ranging from 2 to 11%. Comparisons to the original Huizink study showed most results were comparable.

Conclusions

The methodology and more detailed analyses employed addressed noted limitations of the Huizink study. Findings that the contribution of general anxiety and depression to the variance in pregnancy-related anxiety scores was low, supports previous conclusions that pregnancy-related anxiety is a discrete anxiety type. Recognition of this unique anxiety (associated with many deleterious outcomes) may provide opportunity for prenatal screening/early intervention, potentially resulting in improved pregnancy outcomes. Limitations include no exclusion of women deemed as high-risk pregnancy and the pregnancy-related anxiety scale limited in its ability to fully assess this anxiety type.  相似文献   
164.
In recent years, scholars have begun to investigate the role of digital technologies, namely the Internet, in facilitating growth in sexual commerce. Recent studies investigate the ways the Internet shapes the experiences of sex workers and how sex workers use the Internet to maximize profits and reduce risk exposure. Overall, scholars strategically frame sex work in a digital era in terms of affordances. In doing so, they can note the positive changes in the work experiences of these workers. However, I argue that this literature is altogether too optimistic, and in focusing primarily on the affordances of Internet‐based sex work, these scholars neglect the new dangers that emerge online. In addition, by focusing only on the online practices of escorts, these scholars paint a homogenized portrait of digital sex work and neglect the diversity of labor performed by sex workers. This literature also neglects the diversity among sex workers themselves (e.g., race, ethnicity, class, gender, age, and ability). In order to address these limitations, I make nine specific suggestions for future lines of inquiry.  相似文献   
165.
Delay discounting (DD) is a measure of impulsivity that describes the subjective decline in value of a consequence as the delay to that consequence increases. We sought to assess whether the results of a monetary DD task would be predictive of sexual risk-taking in a group of Internet-using men who have sex with men (MSM). 1402 participants completed an online survey that included questions about the participant’s demographics, sexual history and behavior, drug use, sexual compulsivity, and a monetary DD task. High DD was associated with increased odds of reporting >2 UAI partners in the past 12 months [aOR = 1.5 (1.1–2.1)]. Future studies should examine the utility of DD as a predictor of risky sexual behavior, as well as explore the possibility of HIV prevention interventions targeting DD.  相似文献   
166.
167.
The Narrative Policy Framework has a growing number of researchers seeking to apply the framework in policy process scholarship. This article is intended to assist those interested in conducting an NPF study that is ‘clear enough to be wrong’ (Sabatier, 2000). While graduate programs offer critical methodological training, this article focuses on the specific application of the NPF to research inquiries about the role of policy narratives in the policy process. We approach our discussion by examining various decisions in the research process and include a detailed discussion of specifying the model and obtaining narrative data. We also point out areas for further investigation.  相似文献   
168.
Objectives: This study examines the relationships between information motivation behavioral skills model constructs and their associations with consistent condom use and condom use problems among young Black men. Methods: The authors use baseline data collected from 702 participants in a randomized controlled trial. Analyses involved path modeling and bootstrapped standard errors to estimate associations. Results: Motivation had the largest association with consistent condom use, whereas condom application skills had the largest association with condom use problems. Conclusion: Motivation is the most important predictor of consistent condom use, whereas condom application skills are the most important predictor of condom use problems.  相似文献   
169.
Qualitative data from a larger study on the impact of parental imprisonment in four countries found that children of prisoners face fundamentally similar psychological and social challenges. The ways that children cope, however, are influenced by the interpretative frame adopted by the adults around them, and by how issues of parental imprisonment are talked about in their families. This article argues that families have to reappraise their view of the imprisoned parent and then decide on their policy for how to deal with this publicly. Their approach may be based on openness and honesty or may emphasise privacy and secrecy, or a combination of these. Children are likely to be influenced by their parents'/carers' views, although these may cause conflict for them. Where parents/carers retain a positive view of the imprisoned parent, children are likely to benefit; where parents/carers feel issues of shame and stigma acutely, this is likely to be transmitted to their children. This is important for social workers and practitioners involved in supporting prisoners' families and for parenting programmes.  相似文献   
170.
This article explores the ways in which students' voices can be used to analyse the process of moving schools, at a time outside of those that young people normally change schools. The paper is based on a study in a secondary school and uses qualitative data collected by researchers and student co‐researchers. Two areas were raised by students as important about being at a new school: the perceived challenges and their perceptions of learning in a new environment. It is argued that to respond to issues that arise due to mobility, an engagement with students' views is necessary. Furthermore, this can facilitate policy‐makers, school leaders and educators in providing more effective support for those young people.  相似文献   
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