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排序方式: 共有620条查询结果,搜索用时 15 毫秒
611.
Dário Ferreira Sandra S. Ferreira Célia Nunes Miguel Fonseca João T. Mexia 《统计学通讯:理论与方法》2013,42(22):5445-5466
AbstractWe use chi-squared and related pivot variables to induce probability measures for model parameters, obtaining some results that will be useful on the induced densities. As illustration we considered mixed models with balanced cross nesting and used the algebraic structure to derive confidence intervals for the variance components. A numerical application is presented. 相似文献
612.
613.
Waters K Harris K Hall S Nazir N Waigandt A 《Journal of American college health : J of ACH》2006,55(3):133-139
Social smoking is a newly identified phenomenon in the young adult population that is poorly understood. We investigated differences in social smoking (smoking most commonly while partying or socializing) and other smoking within a convenience sample of college smokers (n = 351) from a large midwestern university. Results revealed that 70% of 351 current (past 30-day) smokers reported social smoking. No significant difference was found in motivation to quit between smoking groups. However, a significant difference was found between groups in confidence to quit, the number of days smoked, and the number of cigarettes smoked on those days. More social smokers than expected did not perceive themselves as smokers. Logistic regression analysis revealed that lower physical and psychological dependence and higher social support scores predicted social smoking. 相似文献
614.
Altshuler S 《Journal of social work in disability & rehabilitation》2006,6(1-2):23-33
Social workers who work with families and children are often unaware of the legal protections afforded to educational experiences for children, particularly to children with disabilities. Yet, all social workers, regardless of their practice setting, should be aware of the important educational rights to which children with disabilities and their families are entitled, as codified in the original legislation, P.L. 94-142, and its subsequent revisions. This legislation is currently entitled the "Individuals with Disabilities Education Act," or the "I.D.E.A." Provisions included in the I.D.E.A. are covered with which all states that receive federal educational funding are mandated to comply. Reviewed are the 13 "disabling conditions" that allow for students to qualify to receive special educational services, as long as one of the conditions is adversely impacting their educational success. It concludes with recommendations for social work advocacy regarding this legislation. 相似文献
615.
Despite the psychological impact of child sexual abuse, many victims do not acknowledge that their experiences were "abuse". This study sought to identify factors that predict how women label their own experiences of childhood sexual abuse. This cross-sectional study was conducted in a family medicine clinic with adult female patients. Subjects completed structured interviews about their childhood environment and their sexual abuse history. Logistic regression analysis showed that labeling of abuse was dependent upon intercourse (beta = 7.43, p = .006), the frequency of abuse by the first perpetrator (beta = 5.08, p = .024), and paternal overprotection (beta = 6.69, p = .010). Findings suggest that the severity of abusive acts is most important and an over-protective father may enhance the victim's acknowledgment that sexual touching is abusive. 相似文献
616.
Interpersonal Emotion Regulation in the Workplace: A Conceptual and Operational Review and Future Research Agenda
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Employees need to regulate their own emotions as well as the emotions of others to enhance the quality of interactions with their colleagues. How well this is achieved has important outcomes for both employees and the organizations in which they work. In the field of organizational science, however, differing approaches have emerged regarding the conceptualization and operationalization of emotion regulation (ER) particularly in terms of interpersonal interactions. The present review examines contemporary theoretical perspectives of ER and its measurement with a view to resolving the confusion that currently exists around interpersonal ER in a workplace context. To understand how this field of research has developed so diversely, the authors begin by demonstrating the influence of three major individual‐level ER models on interpersonal‐level approaches: (1) the ER process model; (2) emotional labor; and (3) emotional intelligence. Moreover, to make sense of the range of interpersonal‐level research underpinned by these theories, the authors present a 2×2 categorization, developed by Zaki and Williams (2013), which shows how workplace researchers have variously approached interpersonal ER as an intrinsic vs. extrinsic process, with activation of either response‐dependent or response‐independent categories. This categorization broadly shows interpersonal ER theory used in work contexts tends to fall into four groupings as: (1) a purely extrinsic process; (2) a differentiation of extrinsic interpersonal from intrinsic individual ER; (3) co‐occurring intrinsic and extrinsic interpersonal ER; or (4) interpersonal coregulation. This paper also discusses the measurement of interpersonal ER and concludes by highlighting emerging research directions. 相似文献
617.
The Role of Risk Perception in Flu Vaccine Behavior among African‐American and White Adults in the United States
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Vicki S. Freimuth Amelia Jamison Gregory Hancock Donald Musa Karen Hilyard Sandra Crouse Quinn 《Risk analysis》2017,37(11):2150-2163
Seasonal flu vaccination rates are low for U.S. adults, with significant disparities between African and white Americans. Risk perception is a significant predictor of vaccine behavior but the research on this construct has been flawed. This study addressed critical research questions to understand the differences between African and white Americans in the role of risk perception in flu vaccine behavior: (1) What is the dimensionality of risk perception and does it differ between the two races? (2) Were risk perceptions of white and African‐American populations different and how were sociodemographic characteristics related to risk for each group? (3) What is the relation between risk perception and flu vaccine behaviors for African Americans and whites? The sample, drawn from GfK's Knowledge Panel, consisted of 838 whites and 819 African Americans. The survey instrument was developed from qualitative research. Measures of risk perception included cognitive and emotional measures of disease risk and risk of side effects from the vaccine. The online survey was conducted in March 2015. Results showed the importance of risk perception in the vaccine decision‐making process for both racial groups. As expected, those who got the vaccine reported higher disease risk than those who did not. Separate cognitive and emotional factors did not materialize in this study but strong evidence was found to support the importance of considering disease risk as well as risk of the vaccine. There were significant racial differences in the way risk perception predicted behavior. 相似文献
618.
619.
Migration aspirations and the perceptions of the political,economic and social environment in Africa
While much research has investigated how objective pull factors in the destination countries affect migration movements, and how subjective push factors affect migration aspirations, we know little about the interrelationship between subjective and objective factors. This paper therefore examines how people's perceptions of their political, economic and social structural environment affect their migration aspirations and to what extent these perceptions are determined by the objective situation in a country. Accounting for individual perceptions is important because individuals may be affected by structural factors to different degrees, and their knowledge of the objective situation may vary. Perceptions may also be affected by individuals' norms and values as well as people's different expectations. This study is based on data from Round 7 of the Afrobarometer survey, fielded between 2016 and 2018 in 34 African countries. Our findings show that positive perceptions of the structural environment are related to lower migration aspirations and that this relationship is only partly dependent on the objective situation in a country. 相似文献
620.
Khue-Dung Dang Louise M. Ryan Tugba Akkaya Hocagil Richard J. Cook Gale A. Richardson Nancy L. Day Claire D. Coles Heather Carmichael Olson Sandra W. Jacobson Joseph L. Jacobson 《Australian & New Zealand Journal of Statistics》2023,65(3):167-186
High levels of prenatal alcohol exposure (PAE) result in significant cognitive deficits in children, but the exact nature of the dose-response relationship is less well understood. To investigate this relationship, data were assembled from six longitudinal birth cohort studies examining the effects of PAE on cognitive outcomes from early school age through adolescence. Structural equation models (SEMs) are a natural approach to consider, because of the way they conceptualise multiple observed outcomes as relating to an underlying latent variable of interest, which can then be modelled as a function of exposure and other predictors of interest. However, conventional SEMs could not be fitted in this context because slightly different outcome measures were used in the six studies. In this paper we propose a multi-group Bayesian SEM that maps the unobserved cognition variable to a broad range of observed outcomes. The relation between these variables and PAE is then examined while controlling for potential confounders via propensity score adjustment. By examining different possible dose-response functions, the proposed framework is used to investigate whether there is a threshold PAE level that results in minimal cognitive deficit. 相似文献