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31.
Annouschka Laenen Ariel Alonso Geert Molenberghs Tony Vangeneugden 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2009,172(1):237-253
Summary. The concept of reliability denotes one of the most important psychometric properties of a measurement scale. Reliability refers to the capacity of the scale to discriminate between subjects in a given population. In classical test theory, it is often estimated by using the intraclass correlation coefficient based on two replicate measurements. However, the modelling framework that is used in this theory is often too narrow when applied in practical situations. Generalizability theory has extended reliability theory to a much broader framework but is confronted with some limitations when applied in a longitudinal setting. We explore how the definition of reliability can be generalized to a setting where subjects are measured repeatedly over time. On the basis of four defining properties for the concept of reliability, we propose a family of reliability measures which circumscribes the area in which reliability measures should be sought. It is shown how different members assess different aspects of the problem and that the reliability of the instrument can depend on the way that it is used. The methodology is motivated by and illustrated on data from a clinical study on schizophrenia. On the basis of this study, we estimate and compare the reliabilities of two different rating scales to evaluate the severity of the disorder. 相似文献
32.
While few treatment options exist for low sexual desire and arousal, the most common sexual dysfunction in women, a growing body of research supports the efficacy of mindfulness-based approaches. The mechanisms underlying improvements, and whether they are due to mindfulness practice or other treatment components, are unclear. As a result, we designed and pilot-tested an eight-session group mindfulness-based cognitive therapy for sexuality (MBCT-S) program that includes more extensive practice of mindfulness skills and closely aligns with the evidence-based MBCT program for depression and anxiety. A total of 26 women (mean age 43.9, range 25 to 63) with a diagnosis of sexual interest/arousal disorder participated in eight weekly group sessions, before and after which they completed validated questionnaires. The majority of women attended all sessions and completed the recommended at-home mindfulness exercises. Compared to baseline, women reported significant improvements in sexual desire, overall sexual function, and sex-related distress, regardless of treatment expectations, relationship duration, or low desire duration. Depressed mood and mindfulness also significantly improved and mediated increases in sexual function. These pilot data suggest that eight-session MBCT-S is feasible and significantly improves sexual function, and provide the basis for a larger randomized-controlled trial (RCT) with a longer follow-up period. 相似文献
33.
Ariel Alvarez 《Journal of Child Custody》2017,14(1):49-72
Movies often reflect public perceptions. The portrayal of foster care in movies provides insight regarding beliefs and attitudes children, parents, and others bring with them as they interact with the foster care system. The study focus was to identify images of foster care portrayed in 37 nondocumentary movies produced in the United States and Canada between 1921 and 2012. Using Framing Theory, an iterative review process was used to derive three dominant images presented to audiences: child entrance into foster care, a broken foster care system, and life in foster care. Movie images generally misrepresented the realities of foster care in the United States, highlighting the importance of those involved in child custody and providing a more realistic image of foster care. 相似文献
34.
This study examined the potential for educational investments in Mexican immigrant mothers to enhance their management of their children's pathways through the educational system in the United States, which often disadvantages them. We tested this hypothesis with data on 816 Mexican immigrant women and their children from the Early Childhood Longitudinal Study–Kindergarten Cohort (ECLS‐K). The results suggest that mothers who pursued their own schooling over a 4‐year period, regardless of whether they obtained a degree, increased their engagement with their children's schools during that same period. The results appear to be robust to a wide range of factors that select women into continuing education. 相似文献
35.
We demonstrate that winner selection in two prominent proportional representation voting systems is a computationally intractable
problem—implying that these systems are impractical when the assembly is large. On a different note, in settings where the
size of the assembly is constant, we show that the problem can be solved in polynomial time. 相似文献
36.
This article explores some of the social and clinical issues facing the many different kinds of gay and lesbian families that are becoming increasingly visible in the United States. Research findings are discussed that dispel popularly held myths and stereotypes concerning these families, gays and lesbians as parents, and their children. Clinical vignettes are presented to illustrate issues often encountered in the consulting room, some unique to gay and lesbian families and some common to all families. 相似文献
37.
38.
Ariel Erumel 《Sociologie du Travail》2003,45(2):169-189
On the basis of meticulous chronicles kept about the making of mutton in the Barèges valley in the French Pyrenees, this sociological study of markets examines changes in the complex relations formed between economic interests and local identities in farming. In the 1970s, pressure to standardize mutton for sale on a national market tended to efface the specific characteristics of local produce from this area in particular. In the 1980s however, producers tried to resist in various ways — direct sales in 1984, a brand name strategy in 1987 — against this loss of specificity in an undifferentiated marketplace. In 1995, a label of origin (AOC) was drawn up that not only singled out and stabilized local produce but also redefined groups of actors, ranging from producers who now focus on quality produce to consumers who increasingly look like gourmets searching for “originality”. Furthermore, this certification process led to closely linking the production and sale of produce to the promotion of a redefined local identity, which we might have imagined as being threatened owing to the expansion of business rationales. 相似文献
39.
Rochon PA Mashari A Cohen A Misra A Laxer D Streiner DL Clark JP Dergal JM Gold J 《Accountability in research》2004,11(3-4):215-223
Objective: To evaluate the representation of minority groups in randomized control trials (RCTs), and the frequency with which this information is reported. Study Design: Reviewers collected data on the racial/ethnic composition of study samples from all RCTs published in six leading medical journals in 1999. Results: Of the 280 RCTs, most (204, 71.3%) provided no information on the race/ethnicity of participants. Of the 89 U.S.-based RCTs, 50 (56.1%) reported their minority distribution. Relative to other trials, those funded by the National Institute of Health (NIH) (n = 52) were more likely to report race/ethnicity data (55.8% vs. 23.7%; x2 = 20.9, p <_0.001) and to include nonwhite participants (13.5 % vs. 12.5%; x2=22.7, p<_0.001). Conclusion: Minority groups are currently under-represented in clinical trials. Information on the race and ethnicity of clinical trial participants is currently underreported in six leading medical journals. Reporting of minority group information was significantly better only in NIH funded trials, which also were more likely to include nonwhite participants. This suggests that mandatory reporting policies may have a positive effect on both reporting and representation. 相似文献
40.
Ariel Rubinstein 《Theory and Decision》1983,15(2):151-159
Most legal systems rely heavily on the notion of the reasonable man. Here an attempt is made to analyze the reasonable man in a social choice model. The main argument is that if the reasonable man satisfies a certain set of axioms, he essentially coincides with one of the individuals, both in terms of his preferences and in terms of his expectations. 相似文献