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Bibliometric analysis to identify core reference sources of virtual reference transactions 总被引：1，自引：0，他引：1
As the use of electronic reference sources becomes commonplace, virtual reference services are expanding in scope, modes, and popularity. Simultaneously, reference practices are evolving as well. One concept that may be challenged by these trends is the notion of the core reference collection. What are the sources that form this core collection, and what are its characteristics? Are similar sources used to answer users' questions in virtual and traditional reference? How do core collections of public and academic libraries differ? An analysis of 1851 e-mail and chat reference transactions from public and academic libraries reveals that the notion of a core reference collection persists in the world of virtual reference services. In both types of libraries, responses to patrons showed a skewed bibliographic distribution; librarians used a small group of sources to answer most of the questions. Almost all sources used were electronic. Academic libraries tended to make greater use of fee-based sources, but public libraries more often used sources freely-available on the Web. 相似文献
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The researchers addressed two questions: (1) Does maternal reading mediation and family home literacy environment (HLE) relate
to children’s emergent literacy (EL) level? and (2) Do the relationships among these variables differ as a function of socioeconomic
strata (SES) level. A total of 94 5–6-year-old children, 47 from low SES (LSES) and 47 from high (HSES) families, and their
mothers participated. Mother–child interactions while reading an unfamiliar book were videotaped and their verbal expressions
were coded for extracting maternal mediation level. Children’s independent EL level was assessed prior to the interaction.
Compared with the LSES group, HSES children showed higher EL levels and their homes had a richer literacy environment. Maternal
mediation level differed by SES: LSES mothers paraphrased text more often; HSES mothers’ higher mediation level included a
discussion of the written system and making connections beyond the text. In the HSES group, maternal mediation level and HLE
related to children’s EL; no such relationships appeared in the LSES group. Results are discussed in terms of children’s socio-economic
background and their reading experiences. Implications for researchers and educational practices about the relationships between
children’s literacy development, SES, HLE, and parental mediation are discussed. 相似文献
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An innovative learning environment is the current outcome of the constructivist approach, the essence of which is co-construction of knowledge in an Information and Communication Technology (ICT) environment. We examined how Israeli students perceived 10 characteristics of their classroom learning environment—student cohesiveness, teacher support, involvement, task orientation, investigation, cooperation, equity, differentiation, computer usage and young adult ethos. Particular foci were students’ perceptions of the actual state of their learning environment compared with the preferred state, and which characteristics predicted students’ cooperation. Participants were 1022 students in 33 classes from 12 computerised elementary and middle schools in Israel. Data were collected using the Technology-Rich Outcomes-Focused Learning Environment Inventory (TROFLEI). Results indicated a gap between the actual and the preferred states for all characteristics, although the scope of these gaps differed between elementary-schools students and middle-school students for certain characteristics. Structural equation modelling (SEM) analysis indicated that nine characteristics of the innovative environment in both actual and preferred states were related to cooperation, with these relations being primarily direct with the exception of teacher support and differentiation which had an indirect influence. Teacher support was mediated through student cohesiveness, involvement, equity and young adult ethos, whereas differentiation was mediated through investigation. Evaluation of the innovative learning environment might lead to better insights regarding the behaviours and needs of twenty-first century students in Israel’s education system. These insights could advance constructivist processes and teaching methods and bring the students to effective cooperative learning in an innovative learning environment. 相似文献
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A global perspective on library association codes of ethics 总被引：1，自引：0，他引：1
Pnina Shachaf 《Library & information science research》2005,27(4):513-533
This study of 28 countries involves comparative content analysis of the English versions of codes of ethics proposed by professional associations. It yielded an empirically grounded typology of principles arranged in twenty categories. The most frequently identified principles were professional development, integrity, confidentiality or privacy, and free and equal access to information. While confidentiality and privacy, and equal access to information, appear in all existing typologies of library and information science ethics, other principles, such as copyright and intellectual property, democracy, and responsibility toward society, which appear in almost all other typologies, were evident in fewer than half of the codes. This empirical study provides a global perspective on library association code of ethics. 相似文献
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This article presents a visual documentation tool for the observation of art classes. The documentation of an art class, like the documentation of any active class, is a complex task that requires focusing on clearly designated components. Quick structured sketching, as proposed here, is able to reflect varied simultaneous activities of teachers and students within specific learning environments, and enables triangulation with the customary means of documentation. The observations took place in 21 primary school and junior high art classes and the findings enabled the characterization of three different approaches implemented by the teachers. 相似文献
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Associations between parenting quality and 3-year-olds' school readiness, receptive, and expressive language were examined in relation to the amount of time they spent in childcare, based on data from the NICHD Study of Early Child Care and Youth Development ( N = 1,364). Associations for school readiness and receptive language were stronger among children who experienced medium amounts of childcare than among children who experienced high amounts of childcare, and they were not weaker than among children who experienced primarily maternal care. Contrary to expectations, the association between parenting quality and school readiness among children who experienced medium amounts of childcare was significantly stronger than among children who experienced predominantly maternal care. 相似文献
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