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Vicki Welch Michelle Collins Chris Hatton Eric Emerson Janet Robertson Emma Wells Susanne Langer 《Children & Society》2014,28(6):478-494
Researchers, health and social care workers often seek to understand the perspectives of children; but gathering views directly from children can present difficulties. Parents are often asked to provide accounts of children's feelings or opinions on the assumption that their proxy reports are accurate and unproblematic. This qualitative thematic analysis of open‐question responses from 352 parents and 73 disabled children examines their accounts of the impact of short break services on disabled children. Participants' perspectives differed; children tended to describe immediate outcomes such as enjoying activities and participation; parents acknowledged these, but focused on longer term developmental outcomes for children. 相似文献
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Challenges to the Acceptance of Probabilistic Risk Analysis 总被引:3,自引:0,他引:3
This paper discusses a number of the key challenges to the acceptance and application of probabilistic risk analysis (PRA). Those challenges include: (a) the extensive reliance on subjective judgment in PRA, requiring the development of guidance for the use of PRA in risk-informed regulation, and possibly the development of robust or reference prior distributions to minimize the reliance on judgment; and (b) the treatment of human performance in PRA, including not only human error per se but also management and organizational factors more broadly. All of these areas are seen as presenting interesting research challenges at the interface between engineering and other disciplines. 相似文献
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Internet Paradox Revisited 总被引:7,自引:0,他引:7
Robert Kraut Sara Kiesler Bonka Boneva Jonathon Cummings Vicki Helgeson & Anne Crawford 《The Journal of social issues》2002,58(1):49-74
Kraut et al. (1998) reported negative effects of using the Internet on social involvement and psychological well-being among new Internet users in 1995–96. We called the effects a "paradox" because participants used the Internet heavily for communication, which generally has positive effects. A 3-year follow-up of 208 of these respondents found that negative effects dissipated. We also report findings from a longitudinal survey in 1998–99 of 406 new computer and television purchasers. This sample generally experienced positive effects of using the Internet on communication, social involvement, and well-being. However, consistent with a "rich get richer" model, using the Internet predicted better outcomes for extraverts and those with more social support but worse outcomes for introverts and those with less support. 相似文献
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Vicki Knoblauch 《Theory and Decision》2006,60(1):1-16
Two forms of continuity are defined for Pareto representations of preferences. They are designated “continuity” and “coordinate
continuity.” Characterizations are given of those Pareto representable preferences that are continuously representable and,
in dimension two, of those that are coordinate-continuously representable. 相似文献
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A natural conjugate prior for the nonhomogeneous poisson process with an exponential intensity function 总被引:1,自引:0,他引:1
This article presents a natural conjugate prior for the nonhomogeneous Poisson process (NHPP) with an exponential intensity function, for modeling the failure rate of repairable systems. The behavior of the conjugate prior distribution with respect to its parameters is studied, and the use of this prior in Bayesian estimation is compared to two other estimation approaches (the use of independent prior distributions, and the bivariate normal distribution). The use of the conjugate prior proposed here facilitates Bayesian statistical analysis of aging. In particular, the proposed prior allows us to explicitly account for dependence between the initial failure rate and the aging rate. This is a significant improvement over the assumptions made in most prior work (either the assumption that the aging rate is known, or the assumption that the initial failure rate and the aging rate are independent). Monte Carlo simulation shows that Bayesian estimation using the proposed prior generally performs at least as well as Bayesian estimation using independent priors for the initial failure rate and the aging rate,except in the case where the prior distribution underestimates both the initial failure rate and the aging rate. 相似文献