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31.
The contributions that adult men and women make to households in terms of paid and unpaid work have undergone substantial change, particularly in respect of women's responsibility for income generation, and have been seen as part of the processes of individualization. Recent contributions to the literature have suggested that children are now acquiring independence earlier as part of those same processes. The paper uses qualitative methods to explore the way in which parents in two-parent families, where both are employed, perceive the risks attached to children's exercise of greater independence, how they seek to ‘manage’ those risks and how far the perceptions of parents accord with those of children. We find parents’ perceptions of risk to be strong, but to have little to do with working patterns. In addition, they are often at odds with the actual behaviour of the child. Risks are managed by negotiation, in which children played an active part. We are also able to make some preliminary comments on the difficulties of interpreting scale measures in relation to interview evidence.  相似文献   
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Two disparate statistics often cited for the Western United States raise concern about risks for developmental disabilities in Native American children. First, 13 of the states with the highest percentage of Native American population are located in the Western United States (U.S. Census Bureau, 2012 U.S. Census Bureau. (2012). The American Indian and Alaska Native Population: 2010 (U.S. Census Briefs, January, #C2010BR-10). Retrieved from http://www.census.gov/prod/cen2010/briefs/c2010br-10.pdf [Google Scholar]). Second, more than 161,000 abandoned hard-rock mines are located in 12 Western states (General Accounting Office, 2014 General Accounting Office. (2014, July 14). GAO-11–834T: Abandoned Mines. Information on the number of hardrock mines, cost of cleanup, and value of financial assurances. Statement of Anu K. Mittal, Director, Natural Resources and Environment Team, Testimony before the Subcommittee on Energy and Mineral Resources, Committee on Natural Resources, House of Representatives. Retrieved from http://www.gao.gov/products/GAO-11-834T [Google Scholar]). Moreover, numerous studies have linked low-level metals exposure with birth defects and developmental delays. Concern has emerged among tribal populations that metals exposure from abandoned mines might threaten development of future generations.  相似文献   
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Aboriginal (meaning original peoples) North American mental health is acknowledged to be in a more precarious state than that of the dominant cultures. Disability arises from the conditions of poverty, homelessness, and lack of resources that are compounded for North American aboriginal people by the historical trauma of conquest, being placed on reservations, residential schools, and continued discrimination. We present culturally sensitive and syntonic intervention programs that can reduce the impact of Aboriginal mental disabilities and discuss the commonality among these programs of celebrating culture, language, and tradition.  相似文献   
34.
The UK has long been near the bottom of the EU “childcare league”. Attitudes of policymakers towards employment for the mothers of young children were ambivalent up to and including the Thatcher years, and the problem of “reconciling” work and family was historically deemed to be a private decision. This changed in 1998, when the Labour government put forward the first ever national childcare strategy. This paper argues that the aims behind the strategy were intimately linked to the attack on poverty and social exclusion in that: (1) efforts to stimulate provision focused on disadvantaged neighbourhoods; (2) subsidy was provided for early years education , rather than care (in order to give children a better start in life); and (3) stimulating provision was intended to promote women's employment, especially among lone‐mother families, thereby improving the material welfare of poor families. The means of expanding childcare have taken the form of a complicated set of demand‐ and supply‐side subsidies, reflecting the ongoing commitment to a mixed economy of childcare. The paper argues that this has implications for access and quality, and that there are tensions between the social investment approach to childcare on the one hand, and the desire to promote mothers’ employment on the other.  相似文献   
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One of the main advantages of factorial experiments is the information that they can offer on interactions. When there are many factors to be studied, some or all of this information is often sacrificed to keep the size of an experiment economically feasible. Two strategies for group screening are presented for a large number of factors, over two stages of experimentation, with particular emphasis on the detection of interactions. One approach estimates only main effects at the first stage (classical group screening), whereas the other new method (interaction group screening) estimates both main effects and key two-factor interactions at the first stage. Three criteria are used to guide the choice of screening technique, and also the size of the groups of factors for study in the first-stage experiment. The criteria seek to minimize the expected total number of observations in the experiment, the probability that the size of the experiment exceeds a prespecified target and the proportion of active individual factorial effects which are not detected. To implement these criteria, results are derived on the relationship between the grouped and individual factorial effects, and the probability distributions of the numbers of grouped factors whose main effects or interactions are declared active at the first stage. Examples are used to illustrate the methodology, and some issues and open questions for the practical implementation of the results are discussed.  相似文献   
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In some crossover experiments, particularly in medical applications, subjects may fail to complete their sequences of treatments for reasons unconnected with the treatments received. A method is described of assessing the robustness of a planned crossover design, with more than two periods, to subjects leaving the study prematurely. The method involves computing measures of efficiency for every possible design that can result, and is therefore very computationally intensive. Summaries of these measures are used to choose between competing designs. The computational problem is reduced to a manageable size by a software implementation of Polya theory. The method is applied to comparing designs for crossover studies involving four treatments and four periods. Designs are identified that are more robust to subjects dropping out in the final period than those currently favoured in medical and clinical trials.  相似文献   
40.
Many programs that place low-income students of color in high-achieving college preparatory high schools seek to nurture bridging social capital, connections across class lines that provide leverage in the process of “getting ahead.” Bonding social capital, which focuses more on emotional support and “getting by,” is frequently characterized as less useful for social mobility. Drawing upon in-depth interviews with alumni from one such program, we challenge the notion of bridging and bonding social capital as discrete, countervailing forms of social capital, and demonstrate how the two may complement each other. Specifically, we find that bonding social capital served as a critical resource that students drew upon as they navigated their elite high schools in the face of racism and classism. In doing so, this bonding social capital ultimately facilitated the development of bridging social capital by encouraging student persistence at these institutions. Our findings support critiques of traditional accounts of social capital that devalue the capital possessed by marginalized communities and fuel deficit ideologies. Furthermore, they highlight the personal costs that youth may face in the pursuit of bridging capital, complicating the narrative of social mobility as an unmitigated good.  相似文献   
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