The effects of stimulus similarity on different types of behavioral contrast

Pigeons were trained on multiple schedules with component stimuli of different degrees of similarity. In Experiment 1, a two-component schedule was used in which the two stimuli were either two line orientations or a line orientation versus a diffuse color. Reinforcement rate was varied in one component to determine the effects of stimulus similarity on different aspects of behavioral contrast. Contrast in terms of average response rates (molar contrast) was larger with less similar stimuli. Local contrast effects at the beginning of the component were larger for more similar stimuli, but these effects were more variable and did not attain statistical significance. Independent of the level of molar contrast, the local pattern of schedule interaction differed for the two levels of similarity: with more similar stimuli, the maximum degree of interaction occurred at the beginning of the components and then decreased; with less similar stimuli, the degree of interaction increased throughout the components and was at its maximum near their end. In Experiment 2, the same three stimuli were used while reinforcement rate in the middle component of a three-component sequence was varied; this isolated the effects of the preceding schedule from those of the following schedule. Contrast effects were generally greater in the target component preceding the variable schedule, and these were enhanced by less similar stimuli. Contrast in the target component following the variable schedule was manifested primarily in terms of the behavior at the beginning of the component, and these effects were inconsistently related to stimulus similarity. The functional separation of the effects of stimulus similarity on the different locations of contrast suggest that “anticipatory contrast” and “local contrast” depend upon different mechanisms, thus excluding any account of contrast solely in terms of relative rate of reinforcement.     

中国国家图书馆中文名称规范工作的思考

我国中文名称规范工作处于发展起步阶段,在实践中面临诸多问题.数据整合过程中编目业务流程内外如何协调和制作标准如何统一,以及规范控制中是否所有书目数据中的名称标目都要做规范数据、是否所有名称都要并尽量区分、规范记录是否要面面俱到等等,都是需要思考与解决的问题.当前阶段的规范工作应该避免单纯的理论化,需借鉴国外经验,重视可行性.     

高校分析测试中心功能拓展的探讨

介绍了高校分析测试中心在发展中的主要举措和初步成效.通过高校分析测试中心发展的3个阶段及其功能定位,探讨了高校分析测试中心在软件建设及服务地方经济建设中的功能拓展.     

Developing teaching assistants’ skills in positive behaviour management: an application of Video Interaction Guidance in a secondary school

This paper reports an action research project in a school in the UK designed to investigate the impact of a brief Video Interaction Guidance (VIG) intervention in promoting skills of non-teaching staff in positive behaviour management. A summary of the literature in relation to VIG is provided before describing the project and data collected. Ten teaching assistants (TAs) from a secondary school took part in an intervention using VIG. The impact on TA skills and confidence was assessed using participant ratings of the specific target outcomes of the intervention using the Target Monitoring and Evaluation (TME) system. Participants’ experiences of the intervention were explored during a focus group discussion after the intervention had taken place. TME data suggested a positive impact on TA skills and confidence to support individual pupils, while thematic analysis of focus group data showed a number of themes relevant to the application of VIG in this context, including promotion of effective staff development.     

Predictors of school readiness in five‐ to six‐year‐old children from an Australian longitudinal community sample

This paper reports on school readiness (SR) and its predictors in five‐ to six‐year‐old children from a prospective, longitudinal study of children from eight months to seven years (the Early Language in Victoria Study – ELVS). The ELVS children came from a representative sample of children recruited though the State Government Infant and Child Health Centres at the age of eight months who were studied at yearly intervals with a combination of parent surveys and face‐to‐face assessments. The study had a focus on language, pre‐literacy and behavioural development. In pre‐school and preparatory grade, teachers of the children completed a brief questionnaire rating SR characteristics, including cognitive, language and personal/social competencies. The data bank on these children provided a set of hypothesised child and family predictors of the SR score which were tested via factor analysis and regression analyses. Significant predictors of SR in the equation were evident from two years of age, and were all related to language and pre‐literacy factors from two to six years. Twelve per cent of the children showed language impairment (LI) at five years according to their scores on the Clinical Evaluation of Language Fundamentals, 4th edition (CELF‐4). In an additional analysis we found that these children were significantly lower on SR; they were also of lower social class compared with the remainder of the sample. The most influential factors in readiness for school were child language competencies and pre‐literacy capacities, including phonemic awareness and letter knowledge. Preparation for school involving systematic emphasis on language and pre‐literacy enrichment is recommended for all children before school entry and particularly for children at risk, including those coming from socio‐economic disadvantage and those with delayed and impaired early language development. This addition to pre‐school programmes can have lasting positive effects into pre‐school and beyond, and prevent early school failure.     

A phenomenographic investigation on the use of iPads among undergraduate art and design students

The increasingly widespread use of iPads in higher education (HE) brings to the forefront questions about the contribution of these computer tablets towards teaching and learning. However, there is a noticeable gap of research on the instructional potential of iPads in HE. This paper describes the first stage of a research project on the use of iPads in undergraduate art and design disciplines, and is a collaboration between the research lab “Networked Learning Technologies in Art and Design” at Cyprus University of Technology, and the “Centre for Pedagogic Research” at Falmouth University in England. The participants from both institutions provided a student‐centred perspective, and the qualitative analysis (phenomenography) revealed varied perceptions. Based on the findings of this project, the implication is that there are a number of challenges and obstacles in embedding the use of iPads in art and design education. Further research in the second stage of this collaborative research will investigate the views and motivations of art and design faculty. A video abstract of this article can be viewed at https://www.youtube.com/watch?v=ZBXnuVJ8eBY     

Effect of ischemic preconditioning on repeated sprint ability in team sport athletes

This study investigated whether ischemic preconditioning (IPC) in a trained population affected repeated sprint performance. A secondary aim was to assess responses according to gender. Sixteen (nine females and seven males) well trained team sport athletes took part in a randomised crossover study design. Participants underwent an IPC and placebo treatment involving three periods of 5 min occlusion applied unilaterally (3 × 5 min occlusion to each leg) at either 220 mmHg or 50 mmHg. Each period of occlusion was followed by 5 min reperfusion. Following treatment 5 × 6 s maximal effort sprints were undertaken on a cycle ergometer against 7.5% body mass, each interspersed by 24 s recovery. Measured parameters included peak power, total power, percentage decrement, post-exercise blood lactate and ratings of perceived exertion. Nor within subject main effect for IPC was observed, neither was there an interaction effect with gender. Effect sizes were trivial (ES < 0.2) with the exception of a moderate (ES < 1.2) change in post-exercise blood lactate in the female cohort (1.6 ± 0.4 mmol^?1 lower following IPC). Results suggest no benefit to team sport players in utilising IPC as a means of enhancing repeated sprint performance. A lower blood lactate response in female participants following IPC may suggest improved blood flow through vasodilation.     

Responsibility and School Choice in Education

Consider the following argument for school choice, based on an appeal to the virtues of the market: allowing parents some measure of choice over their particular children's education ultimately serves the interests of all children, because creating a market mechanism in state education will produce improvements through the same pressures that lead to greater efficiency and quality when markets are deployed in more familiar contexts. The argument fails, because it is committed to a principle of equal concern, which (after analysis) implies that a market in education is acceptable only if it is right to hold children disadvantaged by their parents' poor market choices substantively responsible for the fact. Since that claim is untenable, the market‐based argument for school choice not only fails, but also turns out to rely on principles which in fact condemn the very policy it was supposed to support.