体力活动与多发性硬化症研究的10大问题

摘要：全世界约有250万人患有多发硬化症（MS）,并且发病率有增加趋势。MS是一种中枢神经系统疾病,与多种症状和功能障碍相关。目前一线治疗方法对晚期患者基本无效。越来越多的证据表明体力活动（PA）有益于MS患者,但是大多数MS患者存在PA不足和静坐少动行为。因此,我们提出了10个研究问题,旨在指导今后有关PA和MS的研究：1）PA是否是一种MS的缓解性治疗行为？2）PA对MS患者有哪些益处？3）什么样的PA处方最适合MS患者？4）MS患者在PA中有哪些安全问题？5）哪些MS患者可以通过PA获得益处？6）哪些变量可以用来解释PA对MS患者的作用？7）有效促进 MS患者进行PA的行为干预方法是什么？8）我们如何将研究成果用于实际临床工作中？9）静坐少动行为对MS患者有什么影响？10）评价MS患者PA的最佳方法是什么？这些问题对于帮助我们了解PAPA对MS患者长期和短期的效果,开发新方法促进和保持MS患者的PA至关重要,解决这些问题可以大大改善MS患者的生活质量。     

Mesocycles in conserving plastics

Analysis suggests that progress in conservation of plastics objects and artworks can be described by a series of overlapping mesocycles. Focus has been placed for periods of 5–10 years each on determining the degradation pathways in the 1990s, developing strategies to inhibit those pathways from the late 1990s and, since 2006 on actively stabilizing and treating the symptoms of degradation. The primary driving forces behind the direction and rate of progress within each of these three mesocycles have been different and specific. The controlling factor in understanding degradation pathways for heritage plastics has been the origin of the data describing lifetimes. By contrast, mesocycles in developing suitable storage and display microclimates for plastics have mirrored preventive conservation practices for natural polymeric materials. The rate of the third mesocycle, interventive conservation, has been driven by the need to balance the requirements for reversibility in conservation practices with the artist's intent and significance. Developments within each of the three mesocycles from the 1990s to date are discussed in this article. Environmental science and toxicology of waste plastics offer a novel source of information about real time degradation in terrestrial and marine microenvironments that seems likely to contribute to the conservation of similar materials in contemporary artworks.     

Calibrating assessment literacy through benchmarking tasks

Abstract

In calibration tasks students assess exemplar texts using criteria against which their own work will be assessed. Typically, these tasks are used in the context of training for peer assessment. Little research has been conducted on the benefits of calibration tasks, such as benchmarking, as learning opportunities in their own right. This paper examines a dataset from a long-running benchmarking task (～500 students per semester, for four semesters). We investigate the relationship of benchmarking performance to other student outcomes, including ability to self-assess accurately. We show that students who complete the benchmarking perform better, that there is a relationship between benchmarking performance and self-assessment performance, and that students appreciate the support for learning that benchmarking tasks provide. We discuss implications for teaching and learning flagging the potential of calibration tasks as an under-explored tool.     

Increasing Research Self-Efficacy Among Students in Professional Academic Programs

Gains in research self-efficacy for 60 Social Work and 75 Speech-Language Pathology students were compared. Our interest was to investigate whether students enrolled in both research and practice courses made greater gains in research self-efficacy over a semester, as compared to students enrolled in practice courses only. Findings indicated that Speech-Language Pathology students taking both research and practice courses showed the greatest gain. Examination of the Speech-Language Pathology curriculum suggested that when research courses were augmented with opportunities to apply research learning outside of class, greater gain in student confidence was achieved. We discuss implications for curricular development and interdisciplinary discourse on curriculum matters, and these implications reach beyond the two specific disciplines.     

Täuschungshandlungen im Sport

Experimental studies on the head fake in basketball showed that participant’s responses in a pass direction identification task were delayed for incongruent compared to congruent directions of the players gaze and pass (so-called head fake effect). In these studies on the head fake effect, static pictures were presented and responses on the pass direction were given with a simple key press. The present study examines whether an increase in the response complexity affects the head fake effect and whether it can also be transferred to the presentation of dynamic stimuli. In experiment 1, participants were presented with static pictures of a basketball player who passes a ball to the left or to the right. The player’s gaze direction was either oriented in the direction of the intended pass or in the opposite direction (i.?e., a head fake). The participants were asked to respond as quickly as possible to the pass direction and to ignore the gaze direction. Participants gave responses by pressing a key (simple response) or by executing a quasirealistic defense movement (complex response). Response complexity was blocked. In experiment 2, videos replaced the static stimuli. The responses were only given with the complex, full body movement. Results show that the head fake effect is independent of response complexity and that it can also be found when presenting dynamic stimuli.     

Local responses to school‐based management in Hong Kong

This paper adopts a qualitative approach to study the perceptions of six secondary teachers from two schools with a similar background and history of school‐based management (SBM). The study aims to explore the views of the teachers in the following areas: changes in school administration and the structure of the school under SBM; changes in the role of teachers and the activities of the Parent–Teacher Associations; the challenges facing principals; and teachers' worries and concerns under SBM. The study is significant as it supplements the limited number of researches on the roles of teachers and principals under SBM in Hong Kong. As serving teachers now play increasingly important roles in schools and work closely with their principals in administrative and educational matters, they can provide invaluable insights into the new era of change.     

The Impact of a Science Education Game on Students’ Learning and Perception of Inhalants as Body Pollutants

This study investigated the knowledge gains and attitude shifts attributable to a unique online science education game, Uncommon Scents. The game was developed to teach middle school students about the biological consequences of exposure to toxic chemicals in an environmental science context, as well as the risks associated with abusing these chemicals as inhalants. Middle school students (n = 444) grades six through eight participated in the study consisting of a pre-test, three game-play sessions, and a delayed post-test. After playing the game, students demonstrated significant gains in science content knowledge, with game usability ratings emerging as the strongest predictor of post-test content knowledge scores. The intervention also resulted in a shift to more negative attitudes toward inhalants, with the most negative shift occurring among eighth grade students and post-test knowledge gains as the strongest predictor of attitude change across all grade levels. These findings suggest that the environmental science approach used in Uncommon Scents is an efficacious strategy for delivering both basic science content and influencing perceived harm relating to the inhalation of toxic chemicals from common household products.     

Simple Marketing Techniques and Space Planning to Increase Circulation

In the academic Information Commons, the frontline staff are key library assets. This article demonstrates one example of frontline staff observing, analyzing, and modifying user behavior using simple marketing techniques and space planning. James Madison University East Campus Library personnel increased circulation of books by increasing the visibility of the book collection. Minor furniture changes in the lobby, adding rotating themed book displays and providing digital and print signage, produced a dramatic effect. Circulation numbers essentially doubled for the lobby browsing book collection and markedly increased for books highlighted in the displays.     

Learning Together: The Student/Parent/Teacher Triad

This report contains an analysis of both quantitative and qualitative data on participant perceptions of the co‐production of learning. It constitutes a refinement of the working model of the triadic relationship between parents, students, and teachers which was the basis of previous reports (Coleman, Collinge, & Seifert, 1992; Coleman, Collinge, & Tabin, 1992; Coleman & Tabin, 1992; Coleman & Collinge, 1991). Given our earlier findings the focus in this paper is upon the theme of collaboration, which is emerging as one critical element in the relationships within the student/teacher/parent triad.

The analysis shows that there are sharp differences in perceptions of collaboration between different triad members. Collaboration between parents and students is perceived to be both strong and balanced in initiation. Teachers show little awareness of its strength. Collaboration between teachers and parents is perceived by both to be one‐sided; each party sees the other as unresponsive. It is invisible to students. Collaboration between students and teachers varies between classrooms, and seems to be based upon the teachers’ perception of student acceptance of responsibility; parents are very keenly aware of this collaboration where it exists. Classroom level differences are also strong; teacher attitudes and practices clearly determine the extent of collaboration.

In British Columbia parent and student attitudes towards classrooms and teachers are affected, sometimes strongly, by teacher practices of parent involvement. These attitudes contribute to parent and student rating of particular schools.     

Lived experiences and reflections of joint NCATE‐state reviews

Abstract

Teacher education faculty members, state certification officers, and NCATE staff share what they have learned from their NCATE‐state joint review and accreditation visits. Dilemmas concerning the joint review are addressed and include (a) proactive versus reactive measures for institutions of higher education and state affiliations of the American Association of Colleges for Teacher Education, (b) issues of partnership versus separateness, and (c) process versus product frameworks in planning and documenting growth. Conceptual and practical suggestions are offered for working collaboratively to develop high quality teacher education programs and successful joint review and accreditation visits.