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101.
A folded type model is developed for analysing compositional data. The proposed model involves an extension of the α‐transformation for compositional data and provides a new and flexible class of distributions for modelling data defined on the simplex sample space. Despite its rather seemingly complex structure, employment of the EM algorithm guarantees efficient parameter estimation. The model is validated through simulation studies and examples which illustrate that the proposed model performs better in terms of capturing the data structure, when compared to the popular logistic normal distribution, and can be advantageous over a similar model without folding. 相似文献
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Fanyin He Sati Mazumdar Triptish Bhatia Stewart J. Anderson Mary Amanda Dew 《统计学通讯:理论与方法》2017,46(14):7188-7200
Between-group comparisons often entail many correlated response variables. The multivariate linear model, with its assumption of multivariate normality, is the accepted standard tool for these tests. When this assumption is violated, the non-parametric multivariate Kruskal–Wallis (MKW) test is frequently used. However, this test requires complete cases with no missing values in response variables. Deletion of cases with missing values likely leads to inefficient statistical inference. Here we extend the MKW test to retain information from partially observed cases. Results of simulated studies and analysis of real data show that the proposed method provides adequate coverage and superior power to complete case analyses. 相似文献
105.
Ulysses J. Brown III Stephen B. Knouse James B. Stewart Ruby L. Beale 《Journal of applied statistics》2009,36(1):111-120
Structural equation modeling techniques are used to examine the relationship between demographic diversity and perceptions of organizational performance in military units. Analyzing data from the Military Equal Opportunity Climate Survey reveals higher female and minority representation reduces females’ and minorities’ perceptions of organizational effectiveness, respectively. Identical factors appear to influence the perceptions of organizational performance across these two subgroups of employees. The results demonstrate the importance of conducting separate analyses for subgroups in examining the effects of demographic diversity on organizational performance. 相似文献
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Christopher E. J. DeWolfe Margo C. Watt Pablo Romero-Sanchiz Sherry H. Stewart 《Journal of American college health : J of ACH》2020,68(3):219-222
AbstractObjective: Female post-secondary students typically engage in less physical activity than their male counterparts. Given that women have greater anxiety sensitivity (ie, fear of arousal-based body sensations) and anxiety sensitivity is inversely related to physical activity participation, this study sought to determine if anxiety sensitivity mediates gender differences in self-reported physical activity. Participants and methods: A sample of 802 post-secondary students completed the Anxiety Sensitivity Index-3 and a Lifestyles Questionnaire in September 2017. Results: Women reported significantly less physical activity and significantly greater anxiety sensitivity. Anxiety sensitivity was significantly and inversely related to self-reported physical activity. A significant indirect effect of gender on physical activity via anxiety sensitivity was shown (B?=?5.56, SE?=?2.81, p?<?.05, 95% CI [1.31, 12.78], PM?=?.0843). Conclusions: Results suggest that anxiety sensitivity partially explains gender differences in physical activity. Anxiety sensitivity reduction interventions might increase physical activity participation and reduce the existing gender gap. 相似文献
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Mie Plotnikof Pia Bramming Layla Branicki Lrke Hjgaard Christiansen Kelly Henley Nina Kivinen Joo Paulo Resende de Lima Monika Kostera Emmanouela Mandalaki Saoirse O'Shea Banu
zkazan‐Pan Alison Pullen Jim Stewart Sierk Ybema Noortje van Amsterdam 《Gender, Work and Organization》2020,27(5):804-826
The spread of COVID‐19 acutely challenges and affects not just economic markets, demographic statistics and healthcare systems, but indeed also the politics of organizing and becoming in a new everyday life of academia emerging in our homes. Through a collage of stories, snapshots, vignettes, photos and other reflections of everyday life, this collective contribution is catching a glimpse of corona‐life and its micro‐politics of multiple, often contradicting claims on practices as many of us live, work and care at home. It embodies concerns, dreams, anger, hope, numbness, passion and much more emerging amongst academics from across the world in response to the crisis. As such, this piece manifests a shared need to — together, apart — enact and explore constitutive relations of resistance, care and solidarity in these dis/organizing times of contested spaces, identities and agencies as we are living–working–caring at home during lockdowns. 相似文献
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Stewart Landers Matthew J. Mimiaga Lisa Krinsky 《Journal of gay & lesbian social services》2013,25(3):316-336
This paper reports formative qualitative findings from the Open Door Project (ODP), a unique program created by the Lesbian, Gay, Bisexual and Transgender (LGBT) Aging Project. Data were collected from Open Door Task Force members (N = 34). This includes 4 focus groups that were held with a total of 22 participants; and key informant interviews that were conducted with 12 participants from 10 different agencies. Findings revealed that agencies took significant steps to make important and long-lasting structural changes, including changing their diversity and personnel policies, and intake forms to be LGBT inclusive; implementing ongoing staff training initiatives on LGBT issues; and actively involving leadership, including senior managers, executive directors, vendors, and Councils on Aging, in helping to create and sustain organizational change. The ODP is an effective model to increase cultural competence in working with aging LGBT communities. 相似文献