Development of system thinking skills in the context of earth system education

The current study deals with the development of system thinking skills at the junior high school level. The sample population included about 50 eighth‐grade students from two different classes of an urban Israeli junior high school who studied an earth systems‐based curriculum that focused on the hydro cycle. The study addressed the following research questions: (a) Could the students deal with complex systems?; (b) What has influenced the students' ability to deal with system perception?; and (c) What are the relationship among the cognitive components of system thinking? The research combined qualitative and quantitative methods and involved various research tools, which were implemented in order to collect the data concerning the students' knowledge and understanding before, during, and following the learning process. The findings indicated that the development of system thinking in the context of the earth systems consists of several sequential stages arranged in a hierarchical structure. The cognitive skills that are developed in each stage serve as the basis for the development of the next higher‐order thinking skills. The research showed that in spite of the minimal initial system thinking abilities of the students most of them made some meaningful progress in their system thinking skills, and a third of them reached the highest level of system thinking in the context of the hydro cycle. Two main factors were found to be the source of the differential progress of the students: (a) the students' individual cognitive abilities, and (b) their level of involvement in the knowledge integration activities during their inquiry‐based learning both indoors and outdoors. © 2005 Wiley Periodicals, Inc.     

A Peer‐tutoring Scheme to Support Independent Learning and Group Project Work in Mathematics

A peer‐tutoring scheme was introduced to an undergraduate mathematics module. This was to provide a learning support for an independent learning programme. These student support groups also functioned as task groups for group project work. In the independent learning programme, students were directed to read selected passages of text, to attempt certain exercises and to devise peer assessment tasks. For some of the sessions senior students were present and functioned as additional peer tutors. To assess the students’ attitudes to the peer‐supported independent learning programme, an Attitudes to Peer‐tutoring Questionnaire was constructed. The results show that the students readily accepted the need to work in groups and to support one another. Overall, 78% felt that they could work easily without pressure and that the sessions were not a complete waste of time. However, 65% of the students did not appear to enjoy the independent learning sessions and felt that they preferred to be responsible only for their own learning.     

Chinese and Canadian Children's Evaluations of Lying and Truth Telling: Similarities and Dfferences in the Context of pro-and Antisocial Behaviors

The present study compared Chinese and Canadian children's moral evaluations of lie and truth telling in situations involving pro- and antisocial behaviors. Seven-, 9-, and 11-year-old Chinese and canadian children were presented 4 brief stories. Two stories involved a child who intentionally carried out a good deed, and the other2 stories involved a child who intentionally carried out a bad deed. When story characters were questioned by a teacher as to who had committed the deed, they either lied or told the truth. Children were asked to evaluate the story characters' deeds and their verbal statements. Overall, Chinese children rated truth telling less positively and lie telling more positively in prosocial settings than Canadian children, indicating that the emphasis on self-effacement and modesty in Chinese culture overrides Chinese children's evaluations of lying in some situations. Both Chinese and canadian children rated trugh telling positively and lie telling negatively in antisocial situations, reflecting the emphasis in both cultures on the distinction between misdeed and truth/lie telling. The findings of the present study suggest that, in the realm of lying and truth telling, a close relation between sociocultural practices and moral judgment exists. Specific social and cultural norms have an impact on children's developing moral judgments, which in turn, are modified by age and experience in a particular culture.     

Operationalizing and validating disciplinary literacy in secondary education

The goal of this study was to define the construct and establish the validity of disciplinary literacy, which has recently gained attention from the implementation of the Common Core State Standards (National Governors Association Center for Best Practices & Council of Chief State School Officers in Common Core State Standards for English language arts & literacy in history/social studies, science, and technical subjects [PDF]. Authors, Washington, DC, 2010). After defining disciplinary literacy in the four core disciplines of English language arts, science, history and social studies, and mathematics, scales were developed and administered to a snowball sample of professionals nationwide, with 857 respondents. The data showed evidence of disciplinary literacy as a multidimensional construct with three related factors: source literacy, analytic literacy, and expressive literacy. Based on EFA and CFA results, we can conclude that there are at least three types of literacy in operation among the four core disciplines. The three factors of literacy varied significantly by the four core disciplines of English/language arts (ELA), science, history and social studies, and mathematics, supporting the notion that each discipline uses literacy uniquely. This is the first study of its kind to attempt to define, quantify, and validate the construct of disciplinary literacy.     

Statistical Power of the Multiple Domain Latent Growth Model for Detecting Group Differences

The latent growth model (LGM) in structural equation modeling (SEM) may be extended to allow for the modeling of associations among multiple latent growth trajectories, resulting in a multiple domain latent growth model (MDLGM). While the MDLGM is conceived as a more powerful multivariate analysis technique, the examination of its methodological performance is very limited. Hence, the present study compared the power of the MDLGM with that of a set of univariate LGMs for detecting group differences in growth rates over time using a Monte Carlo study with a two-group and two-domain design. The results indicated that there were different scenarios where the power rates for the MDLGM were greater than that of the set of LGMs (and vice versa) due to a joint function of the two domains’ intercorrelation size and the group difference effect size.     

波普尔的反归纳主义及其失误

波普尔认为，科学知识即理论内容的增长是科学进步最为重要的标志。然而，科学理论的内容丰富程度与逻辑概率之间正好是反变关系。因此，科学的目标不是追求理论的高概率，而是追求理论的低概率；不是追求理论的可证实性，而是追求理论的可证伪性。既然归纳推理是确立结论真实性或概然性的推理，所以归纳推理是与科学目标背道而驰的，因而应当将它从科学方法论中清除出去。然而，当波普尔引入“逼真性”概念以后，他的验证方法便不可能是完全演绎的，而是或多或少地含有归纳的成分。此外，他把塔尔斯基的真理论作为逼真性概念的理论基础也是错误的。     

强化意识 更新观念——广东图书馆国际化发展初探

作为我国对外开放的前沿阵地,广东经济最先与国际经济融为一体,现在又提出建设文化大省的伟大事业。图书馆事业是文化事业的重要组成部分,因此,在建设文化大省过程中,探讨广东图书馆的国际化问题有重要的现实意义。本文拟从强化意识方面谈谈看法。