Super-latent inhibition with delayed conditioned taste aversion testing     

L. G. De La Casa  R. E. Lubow 《Learning & behavior》2000,28(4):389-399

In three conditioned taste aversion experiments with rats, latent inhibition (LI) was examined as a function of the time interval (1 or 21 days) between the conditioning and the test phases. In Experiments 1 and 2, the effects of US intensity on LI were examined. LI increased in the 21-day condition, as compared with the 1-day condition, with medium and high US intensity, but not with weak US intensity. Groups not preexposed to the CS flavor had similar aversions when testing was conducted 1 day after conditioning, as compared with 21 days. In Experiment 3A, delay-induced super-LI was obtained when the delay was spent in the home cage and the experimental stages took place in a different context (as in Experiments 1 and 2). In Experiment 3B, when all the stages, including the delay period, were conducted in the home cage, there was no super-LI effect. The modulation of delay-induced super-LI as a function of US intensity and context extinction is discussed in relation to association deficit and retrieval interference theories of LI.  相似文献   

跨网关整合检索和整合浏览机制   总被引：19，自引：1，他引：18  

李勇文  张晓林 《图书情报工作》2002,46(9):74-78

介绍跨网关门户的3个层次,着重分析跨网关整合检索的检索协议、元数据格式和著录标引问题,提出可能的解决机制,并进-步探讨跨网关整合浏览的技术线路和基于分类映射的实现机制.  相似文献   

Mexican Americans and the push for culturally relevant education: the bilingual education movement in Tucson, 1958–1969     

Maritza De La Trinidad 《History of education》2015,44(3):316-338

This essay traces the bilingual education movement that began in Tucson through the efforts of local teachers, university faculty and educational leaders. It is argued that Mexican Americans and their allies played a crucial role in promoting the merits of bilingual education at the local, state and national levels. Their advocacy of Spanish-for-Spanish-speakers programmes as a culturally relevant means of improving educational outcomes for Mexican American students led to a push for bilingual education with the support of the National Education Association. The work that educators from Tucson accomplished focused national attention on the education of Mexican Americans and ultimately contributed to the passage of the Bilingual Education Act of 1968. This legislation sparked a national movement to expand bilingual education programmes throughout the Southwest and other parts of the nation.  相似文献   

Social Justice Education in a Diverse Classroom: Examining High School Discussions about Race,Power, and Privilege     

Anjalé D. Welton  Tiffany Octavia Harris  Priya G. La Londe  Rachel T. Moyer 《Equity & Excellence in Education》2015,48(4):549-570

High school students who participate in social justice education have a greater awareness of inequities that impact their school, community, and society, and learn tools for taking action to address these inequities. Also, a classroom that consist of students with a diverse set of identities creates an ideal circumstance in which a teacher can build upon student differences in order to facilitate meaningful discussions about social justice, especially issues of race. Therefore, in this article we use qualitative case study approaches to examine a high school course on social justice education, paying specific attention to the classroom pedagogy and dialogue on issues of race, power, and privilege. The course was purposefully diverse in enrollment, which brought students together who might not have had interactions with each other prior to the class. We employ Hackman's (2005) five components of social justice education (SJE) as a framework for the analysis of the pedagogy and discussions constructed in the classroom, as well as a common language for what constitutes as social justice education in our research inquiry. Students in the course developed a facility for defining and identifying various forms of oppression and injustice. However, we questioned to what extent these very same issues played out in the class dialogue. Due to the level of student diversity, the course was a unique space to learn about racism and intersecting issues of social justice. However, there was still some student resistance to acknowledging certain aspects of racism. In conclusion, we discuss how social justice education is not absolved from, but rife with complex racial politics.  相似文献   

Energy cost and kinematics of level,uphill and downhill running: fatigue-induced changes after a mountain ultramarathon     

Gianluca Vernillo  Aldo Savoldelli  Andrea Zignoli  Spyros Skafidas  Alessandro Fornasiero  Antonio La Torre 《Journal of sports sciences》2015,33(19):1998-2005

This study aimed to determine whether the fatigue induced by a mountain ultramarathon (MUM) led to changes in energy cost and kinematic during level and graded running. Pre- and post-race, 14 ultratrail runners ran on a level, uphill (5%) and downhill (5%) treadmill at 10 km · h^?1. Kinematic data were acquired using a photocell system. Post-race, the downhill energy cost increased by 13.1% (P < 0.001). No change was noted in level and uphill running. Duty factor and stride frequency were increased, whereas swing time, cycle time and stride length were decreased in all conditions (P < 0.05). Contact time was increased and the rate of force generation was decreased only in the uphill and downhill conditions (P < 0.05). Positive correlations were observed between performance time and the pre- to post-changes in the energy cost of level (r = 0.52, P = 0.04) and uphill running (r = 0.50, P = 0.04). MUM-induced fatigue resulted in physiological and spatiotemporal changes, though the response to fatigue varied considerably between running conditions. These changes resulted in a significant increment only in the downhill energy cost. Incorporating downhill locomotion in the training programmes of ultratrailers may help to improve performance-related physiological and biomechanical parameters.  相似文献   

信息素养领域研究主题的演化与研究热点分析     

曹高芳  赵学云  姚岚 《情报科学》2011,(8)

通过对国内核心期刊1992-2010年间刊载的信息素养领域学术论文的年代与期刊分布,由不同时间段的关键词共词聚类分析表征的主流研究领域的发展与演化情况进行分析,揭示目前的研究热点与研究前沿,以期为专家学者在该领域的研究提供借鉴。  相似文献   

关于民办中小学教师流动问题的思考     

李拉 《济宁师范专科学校学报》2006,27(4):82-85

民办中小学教师不合理地流动及其带来的不稳定性已成为影响民办教育事业健康发展的一个重要问题。民办中小学教师不合理流动的原因是多方面的。建立一支结构稳定、素质优良的民办中小学教师队伍,要采取各种措施,转变观念、健全制度,为教师发展提供良好的发展空间和条件。  相似文献   

高校公体武术课教学现状分析与对策研究   总被引：12，自引：0，他引：12  

刘劲松李玉玲  彭彦铭 《吉林体育学院学报》2004,20(4):102-103

通过文献资料、专家访问等方法对目前高校公体武术课教学现状进行客观分析，找准存在的问题，针对在普通高校武术课中采取的教学手段与方法，提出了若干对策。旨在使武术运动在高校健康发展。  相似文献   

Resources     

La Vergne Rosow 《TechTrends》2000,44(4):51-51

  相似文献   

The social status of children with learning disabilities: a reexamination     

W L Stone  A M La Greca 《Journal of learning disabilities》1990,23(1):32-37

Although the low social status of children with learning disabilities (LD) has been well documented, little is known about the specific types of peer status problems that characterize these children. The present study utilized current sociometric procedures in order to clarify the nature of social status difficulties encountered by children with LD. Consistent with previous studies, results revealed that children with LD obtain significantly lower sociometric scores relative to their nondisabled peers. Moreover, children with LD were found to be disproportionately overrepresented in the rejected and neglected sociometric groups, and underrepresented in the popular and average groups. Over half of the total LD sample was classified into one of the low status categories, with approximately equal numbers in the rejected and neglected groups. Implications of these findings and suggestions for future research are discussed.  相似文献