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This study examined two levels of media agenda effects on aggregatepublic opinion from different news sources. The effects wereinvestigated immediately and cumulatively. Content analysisdata from the 2000 U.S. presidential election coverage by fournational news organizations were related to the Gallup pre-electionpoll standings of each candidate. Regression analyses foundthat both the salience of a candidate and the salience of theattributes of a candidate cumulatively, but not immediately,influenced his standing in the polls. An analysis of news sourcessupported the finding that the two levels of agenda-settingeffects seemed mostly cumulative rather than immediate. Newsfrom different sources, however, tended to have effects of differentdegrees and sometimes different directions on candidate pollstandings. Cumulative effects of candidate salience on aggregateopinion change were found for non-partisan and neutral newssources—reporters, poll reporting and public documents—whereasthe effects of candidate attribute salience mostly came frompartisan sources—the candidate himself and members ofthe competing political party. Possible political implicationsof these findings are discussed. 相似文献
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In the Netherlands, as in most other European countries, closed captions for the deaf summarize texts rather than render them verbatim. Caption editors argue that in this way television viewers have enough time to both read the text and watch the program. They also claim that the meaning of the original message is properly conveyed. However, many deaf people demand verbatim subtitles so that they have full access to all original information. They claim that vital information is withheld from them as a result of the summarizing process. Linguistic research was conducted in order (a) to identify the type of information that is left out of captioned texts and (b) to determine the effects of nonverbatim captioning on the meaning of the text. The differences between spoken and captioned texts were analyzed on the basis of on a model of coherence relations in discourse. One prominent finding is that summarizing affects coherence relations, making them less explicit and altering the implied meaning. 相似文献
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The purpose of this study is to examine the relationship between perceived ageism and depression in later life and to clarify the mechanism underlying this relationship by examining the mediating effects of self-perception of aging and purpose in life. The Health and Retirement Study surveys were used for this secondary analysis of data. The sample included 3,991 older adults, and structural equation modeling (SEM) analyses using structural regression models were conducted. SEM analyses revealed that full mediation effects of self-perception of aging and purpose in life exist. Older adults who perceive ageism are likely to have negative self-perception of aging, and this negative view of their own aging is likely to decrease purpose in life and increase depressive symptoms. The results of this study imply that more efforts and resources are necessary to reduce ageism and its negative effect on depression among older adults. Additionally, the current study suggests the necessity of anti-ageism policies and social services. Increasing positive self-perception of aging, purpose in life, and resilience could be the key to a better quality of life for older adults. 相似文献
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Some schools and teachers in Korea and Japan have begun practicing classroom-based reform according to similar visions of
a learning community. The purpose of this study was to investigate reform efforts made by teachers in Korea and Japan toward
turning classrooms into learning communities. Two elementary schools, School K in Korea and School T in Japan, were selected
as major school sites. Research data was collected from two classrooms in each school through teacher interview and classroom
observation. The results of our study showed that efforts made by teachers from the two countries, though aimed at similar
goals to create learning communities and change classroom practices, produced different results. Teachers from both countries
displayed differences in their views or attitudes toward the learning materials and the ways in which they build relationships
with their students. These differences seemed to be derived from the different social and cultural contexts of the teachers
in the two countries. 相似文献
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Hyejin Kim 《Globalisation, Societies & Education》2019,17(3):310-323
Across Asia, the international school scene has experienced marketisation and corporatisation. A consequence is that many wealthier families – outside of expatriate communities – view international schools as a desirable choice, and they seek ways to enrol their children in international schools. States have responded to this situation through policies that manage the boundaries between public or national school systems and international schools. States have made compromises in their international school policies – compromises that allow markets to creep into the broader education systems. This mode of market creation is subtle: Neither families nor state agents advocate for ‘choice’ as a value, nor are there public discourses around international schools in the region celebrating ‘choice’ in education. The compromises made in international school policy relate to whole education systems and have implications for inequality, citizenship, and national identity. 相似文献
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Recent advancements in microfluidics and lab-on-a-chip technologies enabled miniaturization and automation of many downstream nucleic acid analysis steps such as PCR. However, DNA extraction/isolation protocol remains a stand-alone sample preparation step. For a quick sample-to-result solution, downstream protocols and sample preparation protocols need to be seamlessly integrated into a single lab-on-a-chip platform. As a step toward such integration, this paper introduces microfluidic DNA isolation using the liquid–liquid extraction (LLE) method in the drop-to-drop (DTD) format. The electrowetting-on-dielectric digital microfluidic platform is capable of handling a two-phase liquid system easily, which enables DTD LLE. In this study, the extraction of plasmid DNA (pDNA) from an aqueous sample to an ionic liquid is demonstrated. Prior to pDNA extraction study, the DTD LLE protocol was developed and optimized using organic dyes as solutes. The selective extraction of pDNA in the presence of proteins as interfering molecules is also demonstrated. This work implies that DTD LLE can substitute for magnetic beads steps in standard DNA isolation protocols. 相似文献
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The purpose of this study is to validate a multidimensional measure assessing attitudes toward education for older adults. As the elderly population and the demands of education among older adults have increased, the engagement of social workers in educational settings for older adults has also increased. Therefore, assessing social workers’ attitudes toward education for older adults is critical to better understand the appropriate circumstances for successfully providing and expanding educational programs for older adults. Using a sample of 227 social work students, a multidimensional scale consisting of 38 items was developed by focusing on the three subconstructs of attitudes: cognition, emotion, and behavior. Across various statistical analyses such as the examination of coefficient α and the confirmatory factor analysis (CFA), this scale consistently demonstrated strong reliability and validity. This new reliable and valid scale may contribute to the quality of educational programs for older adults by providing for social workers and other helping professionals with an opportunity to examine their attitudes toward educational services for older adults. 相似文献
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A major decision that must be made during study pertains to the distribution, or the scheduling, of study. In this paper, we review the literature on the benefits of spacing, or spreading one's study sessions relatively far apart in time, as compared to massing, where study is crammed into one long session without breaks. The results from laboratory research provide strong evidence for this pervasive “spacing effect,” especially for long-term retention. The metacognitive literature on spacing, however, suggests that massing is the preferred strategy, particularly in young children. Reasons for why this is so are discussed as well as a few recommendations regarding how spacing strategies might be encouraged in real-world learning. While further research and applicability questions remain, the two fields—education and cognitive science—have made huge progress in recent years, resulting in promising new learning developments. 相似文献