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991.
Victor M. H. Ong David J. Nott Minh-Ngoc Tran Scott A. Sisson Christopher C. Drovandi 《Statistics and Computing》2018,28(4):971-988
Synthetic likelihood is an attractive approach to likelihood-free inference when an approximately Gaussian summary statistic for the data, informative for inference about the parameters, is available. The synthetic likelihood method derives an approximate likelihood function from a plug-in normal density estimate for the summary statistic, with plug-in mean and covariance matrix obtained by Monte Carlo simulation from the model. In this article, we develop alternatives to Markov chain Monte Carlo implementations of Bayesian synthetic likelihoods with reduced computational overheads. Our approach uses stochastic gradient variational inference methods for posterior approximation in the synthetic likelihood context, employing unbiased estimates of the log likelihood. We compare the new method with a related likelihood-free variational inference technique in the literature, while at the same time improving the implementation of that approach in a number of ways. These new algorithms are feasible to implement in situations which are challenging for conventional approximate Bayesian computation methods, in terms of the dimensionality of the parameter and summary statistic. 相似文献
992.
Andrew D. Eaton Jessica S. Cattaneo Jocelyn M. Watchorn Celeste Bilbao-Joseph Scott Bowler Michael Hazelton 《Social work with groups》2018,41(4):323-335
Serodiscordant or magnetic couples experience HIV-related issues that can compound daily stressors. Psychoeducational couples group interventions can build coping skills and increase relationship satisfaction. Throughout Summer 2014, 6 gay male magnetic couples (n = 12) collaboratively designed and participated in an 8-session psychoeducational support group. The intervention was feasible (i.e., recruitment was <2 weeks, it was easy to coordinate) and acceptable (i.e., each session was consistently rated very good or outstanding). Relationship quality improved significantly in all couples regardless of whether couples agreed on how to manage HIV within their relationship. Implementation of this model is encouraged to fully evaluate this promising intervention. 相似文献
993.
Labor migration profoundly affects households throughout rural Africa. This study looks at how men’s labor migration influences
marital fertility in a context where such migration has been massive while its economic returns are increasingly uncertain.
Using data from a survey of married women in southern Mozambique, we start with an event-history analysis of birth rates among
women married to migrants and those married to nonmigrants. The model detects a lower birth rate among migrants’ wives, which
tends to be partially compensated for by an increased birth rate upon cessation of migration. An analysis of women’s lifetime
fertility shows that it decreases as the time spent in migration by their husbands accrues. When we compare reproductive intentions
stated by respondents with migrant and nonmigrant husbands, we find that migrants’ wives are more likely to want another child
regardless of the number of living children, but the difference is significant only for women who see migration as economically
benefiting their households. Yet, such women are also significantly more likely to use modern contraception than other women.
We interpret these results in light of the debate on enhancing versus disrupting effects of labor migration on families and
households in contemporary developing settings. 相似文献
994.
Alan Slater Gavin Bremner Scott P. Johnson Penny Sherwood Rachel Hayes Elizabeth Brown 《Infancy》2000,1(2):265-274
Several previous experiments have found that newborn and young infants will spend more time looking at attractive faces when these are shown paired with faces judged by adults to be unattractive. Two experimental conditions are described with the aim of finding whether the “attractiveness effect” results from attention to internal or external facial features, or both. Pairs of attractive and less attractive faces (as judged by adults) were shown to newborn infants (mean age 2 days, 9 hours), where each pair had either identical internal features (and different external features) or identical external features (and different internal features). In the latter, but not the former, condition the infants looked longer at the attractive faces. These findings are clear evidence that newborn infants use information about internal facial features in making preferences based on attractiveness. It is suggested that when newborn (and older) infants are presented with facial stimuli, whether dynamic or static, they are able to attend both to internal and external facial features. 相似文献
995.
Jeromey B. Temple Heather Wong Angeline Ferdinand Scott Avery Yin Paradies Margaret Kelaher 《The Australian journal of social issues》2020,55(4):376-395
Using the National Aboriginal and Torres Strait Islander Social Survey, this paper examines exposure to interpersonal racism and avoidance reported by Aboriginal and Torres Strait Islander people with disabilities. We find that in 2014–2015, 32 per cent of people aged 15–64 without a disability experienced racism compared with 42 per cent of those with a disability. Half of those living with an intellectual or psychological disability reported racism, and about 20 per cent of those with any disability avoided settings such as healthcare, education or the general public due to past instances of racism, relative to 11 per cent of those without a disability. After adjusting for confounding factors and complex survey design, presence of a disability was associated with a 1.6–1.8 odds increase in exposure to racism, more frequent racist exposure and avoidance. Disability was further associated with an approximate doubling of the odds of reporting multi-context avoidance and the likelihood of reporting both racism and avoidance in tandem. Severity of disability, higher numbers of disabling conditions and specific disability types were associated with increased odds of racism and avoidance. Independent of these effects, removal from one's natural family and identifying with homelands was strongly associated with racism and avoidance. 相似文献
996.
997.
Bies Angela Kennedy Scott 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2019,30(4):619-633
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - There exists a current paradox of philanthropy and the state in China: a stronger social sector accompanied with growth in... 相似文献
998.
Scott E. Wilks Daphne S. Cain Kellie B. Reed-Ashcraft Jen Geiger 《Journal of gerontological social work》2017,60(8):606-618
ABSTRACTThe purpose of this study was to conduct a preliminary evaluation of a gerontology specialization program (GSP) within a Council on Social Work Education (CSWE)–accredited master of social work (MSW) program. This study utilized a pretest/posttest design with a three-group comparison: group 1—GSP students; group 2—students from the group 1 program but not in GSP; and group 3—students at two external MSW programs with no GSPs. The overall sample comprised 220 advanced year students. A CSWE Gero-Ed Center/Hartford Partnership empirical measure was used to assess overall, gero social work practice competency. Within-group analyses revealed a significant increase in gero competency scores from pretest to posttest among all groups, with GSP students showing the largest increase. Between-group analysis at pretest revealed that the GSP group showed lower gero competency scores than both non-GSP groups. At posttest, these results overturned: GSP students scored significantly higher gero competency scores than both non-GSP groups. These preliminary findings suggest that the GSP offers an impactful, positive role in development of practice skills for the next generation of gero social work practitioners and scholars. A follow-up study with additional years of data will increase longitudinal rigor and confidence in the long-range efficacy of this GSP. 相似文献
999.
1000.
Constructing Immigrants: Portrayals of Migrant Groups in British National Newspapers, 2010–2012
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Public opposition to immigration in Britain reflects perceptions of immigrants that focus disproportionately on “illegal” immigration and asylum seekers, rather than more numerous workers, students, and family members. This study examines coverage of immigration in the British national press, to see whether press portrayals of migrants provide a basis for these images of immigration underlying public attitudes. We use corpus linguistic methods to analyze 43 million words of news from 2010 to 2012. Among other findings, we show that press portrayals match public perceptions of migrants, with “illegal immigrants” and “failed asylum seekers” as predominant depictions in broadsheet and tabloid newspapers. 相似文献