排序方式： 共有102条查询结果，搜索用时 625 毫秒
41.
我国电化教育理论研究重心的嬗变 总被引：1，自引：1，他引：1
从20世纪70年代末我国电化教育事业重新起步至今，我国电化教育的发展经历了三个阶段：1．以媒体为核心的阶段；2．人与媒体并重的阶段；3．以人为核心的阶段。由重视物到人、物并重，再到重视人，以人为核心，这就是我国电化教育理论研究重心嬗变的轨迹。 相似文献
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Utkun Aydın Zelha Tunç-Pekkan Rukiye Didem Taylan Bengi Birgili Mustafa Özcan 《The Journal of educational research》2018,111(2):151-162
In this quasiexperimental study, the authors investigated the effects of university within school partnership model, within which faculty members acted as teacher-researchers to improve fractional knowledge among middle school (Grades 5–8) students. Students in nine Grade 6 mathematics classes from two public middle schools in Turkey were assigned to two conditions: University within school model instruction and traditional instruction. Pre- and posttest data showed that the students exposed to instruction through the university within school partnership model significantly outperformed their traditional instruction peers on the fractions test. Results indicated that students made significant gains in fractional knowledge in the experimental classrooms and in different subgroup populations. It was suggested that a substantial amount of mathematical infusion through partnership could have a positive impact on middle school students' fractional knowledge. The educational implications of the study were also discussed. 相似文献
43.
Jimmy De La Torre 《Journal of Educational Measurement》2008,45(4):343-362
Most model fit analyses in cognitive diagnosis assume that a Q matrix is correct after it has been constructed, without verifying its appropriateness. Consequently, any model misfit attributable to the Q matrix cannot be addressed and remedied. To address this concern, this paper proposes an empirically based method of validating a Q matrix used in conjunction with the DINA model. The proposed method can be implemented with other considerations such as substantive information about the items, or expert knowledge about the domain, to produce a more integrative framework of Q‐matrix validation. The paper presents the theoretical foundation for the proposed method, develops an algorithm for its practical implementation, and provides real and simulated data applications to examine its viability. Relevant issues regarding the implementation of the method are discussed. 相似文献
44.
Gerda Jimmy Roland Seiler Urs Mäder 《Measurement in physical education and exercise science》2013,17(3):236-248
The purpose of this study was to compare the validity and output of the biaxial ActiGraph GT1M and the triaxial GT3X (ActiGraph, LLC, Pensacola, FL, USA) accelerometer in 5- to 9-year-old children. Thirty-two children wore the two monitors while their energy expenditure was measured with indirect calorimetry. They performed four locomotor and four play activities in an exercise laboratory and were further measured during 12 minutes of a sports lesson. Validity evidence in relation to indirect calorimetry was examined with linear regression equations applied to the laboratory data. During the sports lessons predicted energy expenditure according to the regression equations was compared to measured energy expenditure with the Wilcoxon-signed rank test and the Spearman correlation. To compare the output, agreement between counts of the two monitors during the laboratory activities was assessed with Bland-Altman plots. The evidence of validity was similar for both monitors. Agreement between the output of the two monitors was good for vertical counts (mean bias =??14 ± 22 counts) but not for horizontal counts (?17 ± 32 counts). The current results indicate that the two accelerometer models are able to estimate energy expenditure of a range of physical activities equally well in young children. However, they show output differences for movement in the horizontal direction. 相似文献
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编者按:凯瑟琳·博尔斯(Katherine C Boles)博士从70年代起一直从事小学、中学,以及大学的课堂教学,现任哈佛大学教授和"教师与领导艺术"和"教与学"教学项目主任.除了执教,她还发表、出版了许多关于学校改革、教师教育以及教师领导新形武方面的文章和书籍.她提倡通过政府教育政策的变化,来对教育领域进行改组;主张实行职业阶梯制,给予教师职业晋级的机会,基于教师的工作成就给予加薪,从而提高教师在社会上的地位. 相似文献
46.
A Note on the Invariance of the DINA Model Parameters 总被引：1，自引：0，他引：1
Cognitive diagnosis models (CDMs), as alternative approaches to unidimensional item response models, have received increasing attention in recent years. CDMs are developed for the purpose of identifying the mastery or nonmastery of multiple fine-grained attributes or skills required for solving problems in a domain. For CDMs to receive wider use, researchers and practitioners need to understand the basic properties of these models. The article focuses on one CDM, the deterministic inputs, noisy "and" gate (DINA) model, and the invariance property of its parameters. Using simulated data involving different attribute distributions, the article demonstrates that the DINA model parameters are absolutely invariant when the model perfectly fits the data. An additional example involving different ability groups illustrates how noise in real data can contribute to the lack of invariance in these parameters. Some practical implications of these findings are discussed . 相似文献
47.
甄暾 《中国教育技术装备》2003,(10):13-14
教育技术由教育智慧经验、方法技能和工具手段三大要素有机结合而成。教育技术装备的特征是:真实再现性、具象性、可重复使用性和经济性。因地制宜是教育技术应用的重要准则。 相似文献
48.
郝暾 《河北广播电视大学学报》2014,(1):48-53
语言中总有一部分词或临时出现于另一类词的位置上而成为一种活用,或由于这种活用的广泛使用而成为一种兼类,而什么样的名词可以发生这种游移是一个值得探寻的问题。从《吕氏春狱》来看,不仅具有非典型特征的名词可以活用,具有高依附性的典型名词也可以活用。依附性的高低是指名词所表示的概念与其他概念关联的紧密程度。名词活用为动词的五种转喻模式反映了活用的模式和动因。动名之间活用的不平衡性则反映出汉语动词性可能的历时变化。 相似文献
49.
We consider a multi-stage retrieval architecture consisting of a fast, “cheap” candidate generation stage, a feature extraction stage, and a more “expensive” reranking stage using machine-learned models. In this context, feature extraction can be accomplished using a document vector index, a mapping from document ids to document representations. We consider alternative organizations of such a data structure for efficient feature extraction: design choices include how document terms are organized, how complex term proximity features are computed, and how these structures are compressed. In particular, we propose a novel document-adaptive hashing scheme for compactly encoding term ids. The impact of alternative designs on both feature extraction speed and memory footprint is experimentally evaluated. Overall, results show that our architecture is comparable in speed to using a traditional positional inverted index but requires less memory overall, and offers additional advantages in terms of flexibility. 相似文献
50.