共查询到20条相似文献,搜索用时 15 毫秒
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Konstantopoulos S 《Evaluation review》2011,35(1):71-92
Thus far researchers have focused on computing average differences in student achievement between smaller and larger classes. In this study, the author focus on the distribution of the small class effects at the school level and compute the inconsistency of the small class effects across schools. The author use data from Project STAR to estimate small class effects for each school on mathematics and reading scores from kindergarten through third grade. Then, all school estimates were combined to calculate an overall weighted average. The results revealed that a large proportion of the school-specific small class effects are positive, while a smaller proportion of the estimates are negative. Although students benefit considerably from being in small classes in many schools, in other schools being in small classes is either not beneficial or is a disadvantage. Small class effects were inconsistent and varied significantly across schools in all grades indicating a small class by school interaction. 相似文献
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Theory and Society - 相似文献
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Researchers have paid increasing attention to the core discussion network, the set of people we turn to when discussing important matters. Because the core discussion network is theorized to be composed of people's closest ties, not fleeting acquaintances, it is expected to be largely stable, evolving slowly over the span of people's lives. However, recent studies have shown that networks are strongly affected by the contexts in which people interact with others, and as people experience life course transitions, they also often enter new contexts – school, college, work, marriage, and retirement. We ask whether, as actors enter new social contexts, the core discussion network remains stable or changes rapidly. Based on original, longitudinal, qualitative and quantitative data on the experience of first-year graduate students in three academic departments in a large university, we examine the stability of the core discussion network over the first 6 and 12 months in this new context. We test four competing hypotheses that focus on strength of ties, new opportunities, obligations, and routine activity and predict, respectively, stasis, expansion, shedding, and substitution. We find that the core discussion network changes remarkably quickly, with little or no lag, and that it appears to do so because both the obligations that people face and the routine activities they engage in are transformed by new institutional environments. Findings suggest that core discussion network may be less a “core” network than a highly contextual support network in which people are added and dropped as actors shift from environment to environment. 相似文献
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Content analysis is widely used to analyze sexual themes and messages on television. Although researchers generally use a sampling procedure to identify programs for analysis, there is currently no gold standard for the number of episodes needed to establish a valid, representative sample. This study sought to explore how many episodes of weekly television programs should be examined for an accurate assessment of sexual content present throughout the season. Various sampling strategies were used to select episodes from programs that ran in the 1998-1999 season, and results were compared with data collected from all episodes of these programs to test representativeness. Findings suggest that to provide a representative assessment of sexual content on television programs for behavior-level variables, a random sample of five episodes of weekly television programs is sufficient, while three episodes may be acceptable if variation is minimal. A random sample of seven episodes is needed for character-based analyses. 相似文献
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Despite recent empirical evidence on the importance of perceived inequality, its analysis is still underexplored. In this paper we study whether unobserved perceptions of inequality are reflected in observed individual opinions in a consistent fashion. Inconsistency is relevant to ealuate the level of agreement that individuals share with respect to different domains of inequality.Using the wave from the 2009 International Social Survey Program in the US, we show that inequality is a complicated concept prone to inconsistencies and propose a testing procedure to an empirical appraisal. We find that inconsistencies exist though they may not extend to all the domains of inequality. This inconsistency also emerges by analyzing the relation between unobserved perceptions and political treatment suggesting the hypothesis that inconsistency may be associated with a set of relevant political preferences. 相似文献
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Catherine Schepers Sara De Gieter Roland Pepermans Cindy Du Bois Ralf Caers Marc Jegers 《Nonprofit management & leadership》2005,16(2):191-208
This article reviews research on motivation of employees in the nonprofit sector, with a major emphasis on the motivation of teachers and hospital nursing staff. Although both areas are widely researched in the nonprofit sector, empirical motivation research conducted in schools and hospitals is certainly not extensive. Nevertheless, based on these limited research findings, we derive potential hypotheses for future research in schools and hospitals. 相似文献
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《Sociology Compass》2018,12(5)
This article provides an overview of key findings in the field of economic news research. The focus is on the relationship between the real economy and economic news, and the subsequent effects of economic news on people's economic perceptions. Additionally, we discuss research that looks into the construction of economic and financial news. Recommendations for future research relate to the application of mixed methods approaches and individual level studies, and a specific focus on new (social) media. 相似文献
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Competition is ubiquitous in economic life. Yet, negative consequences of competitive environments have been reported and everyday experience suggests that competitive situations can be very stressful. It is, however, an open question whether or not economic competitions in the laboratory indeed elicit physiological stress reactions. Our study examined subjectively perceived stress and physiological changes induced by a well-established economic laboratory competition paradigm (first used in Niederle & Vesterlund, 2007) in a mixed-gender sample of 111 healthy participants. A mental arithmetic task was performed first under a piece rate (i.e., non-competitive) payment scheme and afterwards under a tournament condition. In a third round, participants decided how to be paid (i.e., piece rate or tournament). Our results indicate that compared to a control group, which performed only the non-competitive condition, the competitive game condition elicited subjective and physiological reactions that are indicative of mild stress, i.e., an increase in heart rate and a decrease of calmness and mood. Furthermore, reactions that are thought to reflect an active coping style were related to the self-selection into competition in the third round of the game. We speculate that real-life economic competitions might be even stronger stressors and the way how people cope with this kind of stress might be related to competitiveness in real-life economic contexts. 相似文献
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The discovery, development, and marketing of drugs for clinical use is a process that is complex, arduous, expensive, highly regulated, often criticized, and sometimes controversial. In the United States, the Food and Drug Administration (FDA) is the governmental agency responsible for regulating the development and marketing of drugs, medical devices, biologics, foods, cosmetics, radiation-emitting electronic devices, and veterinary products, with the objective of ensuring their safety and efficacy. As part of a broad overview of the drug development process, this article will describe the historical evolution of the FDA. This will provide background for two subsequent articles in this series, which will describe the ethical foundations of clinical research and hethe stages of drug development. 相似文献
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1. Quality of patient care can be enhanced if we know what nursing actions psychiatric patients perceive as helpful. Previous research has focused on perceptions of patients on medical-surgical units. 2. Patients diagnosed with bipolar disorder tended to see nursing actions as more helpful and performed more frequently than patients diagnosed with substance abuse. 3. Although positive feedback was identified as one of the most helpful nursing actions, it was rated only average in frequency of performance. 4. Even patients who had histories of long hospitalization did not want nursing staff to do things for them that they could do for themselves. Nurses need to focus on teaching self-care skills rather than "doing for" the patient. 相似文献
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Inmaculada García José Alberto Molina María Navarro 《Journal of Family and Economic Issues》2007,28(4):546-565
This paper first identifies the determinants of spouses’ satisfaction levels within the household with respect to their leisure
time and, secondly, characterizes whether their preferences have some degree of altruistic or egoistic character in regard
to this particular satisfaction. To that end, it formulates a theoretical framework from the collective family model whose
stochastic formulations are estimated for 14 EU countries. The general empirical results first reveal that the presence of
children has a significantly negative impact on the leisure satisfaction of both spouses. Then, increases in individual incomes
lead to lower own leisure satisfaction levels. Both husbands and wives show egoistic behavior with respect to the labor and
non-labor incomes (wage rate) of their respective spouses’ satisfaction levels.
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María NavarroEmail: |
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Frederick H. Buttel 《Sociological Forum》1989,4(2):247-261
This paper is a commentary on the current tendency among sociologists to embrace the notion that high technologies will be revolutionary or epoch making. The implicit neo-Schumpeterian logic of these claims is detailed, and a preliminary framework for empirical examination is developed for the case of biotechnology. Available evidence suggests that biotechnology, because it will be applied primarily in declining sectors of the economy and is mainly a substitution technology, is unlikely to be an epoch-making technical form. The implications of these observations for sociological reasoning about new technologies and technological change are discussed. 相似文献
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Claims that children need both a mother and father presume that women and men parent differently in ways crucial to development but generally rely on studies that conflate gender with other family structure variables. We analyze findings from studies with designs that mitigate these problems by comparing 2‐parent families with same or different sex coparents and single‐mother with single‐father families. Strengths typically associated with married mother‐father families appear to the same extent in families with 2 mothers and potentially in those with 2 fathers. Average differences favor women over men, but parenting skills are not dichotomous or exclusive. The gender of parents correlates in novel ways with parent‐child relationships but has minor significance for children's psychological adjustment and social success. 相似文献
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Sarah Beth Estes 《Sociology Compass》2011,5(3):233-243
Work–family policies are commonly thought to aid parents in attending to their conflicting work and family responsibilities. Some scholars postulate that policies might detract from the gendered division of domestic labor, in which women take a greater responsibility for housework and childcare than men, while others expect that policies encourage women to maintain traditional family roles even while employed. A review of cross‐national research in market economies shows that policies are not uniformly related to the gendered division of domestic labor, although parental leave offers the most promising avenue through which the gendered division of domestic labor may be diminished. 相似文献
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Blair Stevenson 《Intercultural Education》2014,25(6):468-483
This paper highlights findings of a survey conducted with the Kativik School Board, Canada, to gain insight into the perceptions of Inuit teachers concerning how Inuit culture is taught in the classroom. While findings indicate that teachers are integrating Inuit culture to varying degrees, roughly half of respondents suggest that not enough Inuit culture is being taught. Responses additionally suggest that attempts to articulate culture in schools should consider teachers’ access to cultural knowledge, the creation of effective learning spaces, and the inclusion of community Elders. 相似文献
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Bridging the social networks, field methods and ethics literatures, I make the case that the process of reporting research findings is an ethical issue, and recommend elevating it in the research design. I draw on a reflective account of three research experiences with settings in, respectively, online health communities, economic organizations, and the mainstream media. I proceed in steps, discussing release of personal network results to individual participants, of whole network results to the researched community, and finally of general results to wider audiences, under a unifying idea that a reciprocity obligation underlies the reporting process. I claim that communication should follow an iterative rather than a linear approach to reach all relevant stakeholders, thereby mitigating the vulnerabilities that arise from research. 相似文献
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Structures of evolving populations are traditionally derived from traits of its members. An alternative approach uses network metrics to define groups that evolve jointly. This supposes that selection acts not only on who members are (i.e., traits) but also on to whom they are connected (i.e., interdependent relationships). This paper presents a method to meaningfully quantify differences in evolutionary forces over multiple levels of population taxonomies and tests almost 1000 multilevel partitions of 8 empirical networked populations evolving over time. It shows that multilevel network metrics as selection criteria identifies stronger evolutionary natural selection than trait based population taxonomies. 相似文献