Unraveling the culture of the mathematics classroom: A video-based study in sixth grade     

Fien Depaepe  Erik De CorteLieven Verschaffel 《International Journal of Educational Research》2007,46(5):266-279

Changing perspectives on mathematics teaching and learning resulted in a new generation of mathematics textbooks, stressing among others the importance of mathematical reasoning and problem-solving skills and their application to real-life situations. The article reports a study that investigates to what extent the reform-based ideas underlying these mathematical textbooks impact the current teaching of mathematics. Two problem-solving lessons were videotaped in 10 sixth-grade classrooms and a coding scheme was developed to analyze these lessons with regard to three aspects of the classroom culture that are assumed to enhance students’ mathematical beliefs and problem-solving competencies: (1) the classroom norms that are established, (2) the instructional techniques and classroom organization forms, and (3) the set of tasks students are confronted with. Two instruments were administered to measure students’ beliefs about learning mathematical word problem solving, and to assess their problem-solving processes and skills. The results indicate that some reform-based aspects seemed to be easier to implement (e.g., a strong focus on heuristic skills, embedding tasks in a realistic context) than others (e.g., the use of group work, an explicit negotiation of appropriate social norms).  相似文献   

Do regression-based computer algorithms for determining the ventilatory threshold agree?     

Ekkekakis P  Lind E  Hall EE  Petruzzello SJ 《Journal of sports sciences》2008,26(9):967-976

The determination of the ventilatory threshold has been a persistent problem in research and clinical practice. Several computerized methods have been developed to overcome the subjectivity of visual methods but it remains unclear whether different computerized methods yield similar results. The purpose of this study was to compare nine regression-based computerized methods for the determination of the ventilatory threshold. Two samples of young and healthy volunteers (n = 30 each) participated in incremental treadmill protocols to volitional fatigue. The ventilatory data were averaged in 20-s segments and analysed with a computer program. Significant variance among methods was found in both samples (Sample 1: F = 11.50; Sample 2: F = 11.70, P < 0.001 for both). The estimates of the ventilatory threshold ranged from 2.47 litres.min(-1) (71% VO2max) to 3.13 litres.min(-1) (90% VO2max) in Sample 1 and from 2.37 litres.min(-1) (67% VO2max) to 3.03 litres.min(-1) (83% VO2max) in Sample 2. The substantial differences between methods challenge the practice of relying on any single computerized method. A standardized protocol, likely based on a combination of methods, might be necessary to increase the methodological consistency in both research and clinical practice.  相似文献   

Associations of Early Developmental Milestones With Adult Intelligence          下载免费PDF全文

Trine Flensborg‐Madsen  Erik L. Mortensen 《Child development》2018,89(2):638-648

The study investigated whether age at attainment of 20 developmental milestones within the areas of language, walking, eating, dressing, social interaction, and toilet training was associated with adult intelligence. Mothers of 821 children of the Copenhagen Perinatal Cohort recorded 20 developmental milestones at a 3‐year examination, and all children were administered the Wechsler Adult Intelligence Scale when they were 20–34 years old. Later attainment of a number of milestones was associated with lower adult IQ with the strongest associations found for those related to language and social interaction. The adjusted full‐scale IQ means were 107.0, 101.8, and 100.6 for being able to form a sentence at less than 24 months, at 24 months, and later than 24 months.  相似文献   

A tale of two epidemics: Contextual Word2Vec for classifying twitter streams during outbreaks     

Aparup Khatua  Apalak Khatua  Erik Cambria 《Information processing & management》2019,56(1):247-257

Unstructured tweet feeds are becoming the source of real-time information for various events. However, extracting actionable information in real-time from this unstructured text data is a challenging task. Hence, researchers are employing word embedding approach to classify unstructured text data. We set our study in the contexts of the 2014 Ebola and 2016 Zika outbreaks and probed the accuracy of domain-specific word vectors for identifying crisis-related actionable tweets. Our findings suggest that relatively smaller domain-specific input corpora from the Twitter corpus are better in extracting meaningful semantic relationship than generic pre-trained Word2Vec (contrived from Google News) or GloVe (of Stanford NLP group). However, domain-specific quality tweet corpora during the early stages of outbreaks are normally scant, and identifying actionable tweets during early stages is crucial to stemming the proliferation of an outbreak. To overcome this challenge, we consider scholarly abstracts, related to Ebola and Zika virus, from PubMed and probe the efficiency of cross-domain resource utilization for word vector generation. Our findings demonstrate that the relevance of PubMed abstracts for the training purpose when Twitter data (as input corpus) would be scant during the early stages of the outbreak. Thus, this approach can be implemented to handle future outbreaks in real time. We also explore the accuracy of our word vectors for various model architectures and hyper-parameter settings. We observe that Skip-gram accuracies are better than CBOW, and higher dimensions yield better accuracy.  相似文献   

Strategies for internationalisation at technical universities in the Nordic countries     

Kristensen  Katrine Hahn  Karlsen  Jan Erik 《Tertiary Education and Management》2018,24(1):19-33

This article investigates strategies for internationalisation at technical universities in the Nordic countries. The study explores the institutional rationales for internationalisation, the stories told in the strategy documents, the importance of leaders, faculty, administration and students for implementation of the strategy, and barriers and key components of successful internationalisation. We studied the strategic work with internationalisation across 27 technical universities in Denmark, Finland, Iceland, Norway and Sweden. This work reflects both global trends of competition and the traditional Nordic model of cooperation. Overall, the universities incorporated internationalisation in their strategies in order to increase quality in research and education, and to establish strategic partnerships and networks. There is a shift in rationales from a more traditional approach of internationalisation to a new integrated form.  相似文献   

Politics,Propaganda, and the Esthetics of Detective Fiction: The Case of Hemingway's The Fifth Column     

Erik Nakjavani 《Journal of American culture (Malden, Mass. : 2003)》1991,14(3):81-90

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A Contextual Understanding of the Process of Educational Resilience: High Achieving Dominican American Students and the “Resilience Cycle”   总被引：1，自引：0，他引：1  

Erik E. Morales 《Innovative Higher Education》2000,25(1):7-22

This article explores the lives of academically resilient Dominican American college students at a selective private university in the Northeast. The conceptual framework used to guide the inquiry is based on the assumption that there are certain protective factors that play significant roles in the students' defiance of the odds and their ultimate academic achievement. The findings presented here focus on the emergence of a resilience cycle present during these students' academic journeys. The cycle is presented and its practical implications explored.  相似文献   

Development of Oral Reading Fluency in Young Children at Risk for Failure     

Chuang Wang  Erik Porfeli  Bob Algozzine 《Journal of Education for Students Placed at Risk》2013,18(4):402-425

The body of knowledge on critical components of reading instruction is broad and deep with phonemic awareness, phonics, fluency, vocabulary, and comprehension serving as building blocks for literacy. The importance of fluent reading (i.e., with speed, accuracy, and proper expression, as well as comprehension) in the formula for success is widely accepted. The purpose of this study was to evaluate oral reading rates in a sample of 2nd-grade children. Using growth curve analysis, we identified models for a combined sample of at-risk and not-at-risk children. Large and important differences in oral reading were evident, but the growth rates remained the same throughout the 2nd- grade; in fact, the gap between at-risk and not-at-risk students remained constant. We discuss the implications of our findings for future research and the improvement of practice.  相似文献   

Longitudinal Stability of Reading-Related Skills and Their Prediction of Reading Development     

Jacqueline Hulslander  Richard K. Olson  Erik G. Willcutt  Sally J. Wadsworth 《Scientific Studies of Reading》2013,17(2):111-136

Individual differences in word recognition, spelling, and reading comprehension for 324 children at a mean age of 16 were predicted from their reading-related skills (phoneme awareness, phonological decoding, rapid naming, and IQ) at a mean age of 10 years, after controlling the predictors for the autoregressive effects of the correlated reading skills. There were significant and longitudinally stable individual differences for all four reading-related skills that were independent from each of the reading and spelling skills. Yet the only significant longitudinal prediction of reading skills was from IQ at mean age 10 for reading comprehension at mean age 16. The extremely high longitudinal latent-trait stability correlations for individual differences in word recognition (.98) and spelling (.95) left little independent outcome variance that could be predicted by the reading-related skills. We discuss the practical and theoretical importance of these results and why they differ from studies of younger children.  相似文献   

Interactivity in Society: Locating an Elusive Concept     

Erik P. Bucy 《The Information Society》2004,20(5):373-383

Interactivity has been identified as a core concept of new media, yet despite nearly three decades of study and analysis, we scarcely know what interactivity is, let alone what it does, and have scant insight into the conditions in which interactive processes are likely to be consequential for members of a social system. This article attempts to address this deficiency by critiquing three self-defeating tendencies and an erroneous assumption of interactivity research, then proposes four basic propositions around which systematic knowledge regarding interactivity in society may be built. In the spirit of bridging mass and interpersonal processes, a model of interactivity is proposed to initiate discussion about the concept as a cross-level and multivalent phenomenon—one with both positive and negative consequences—and to spur more socially relevant research. For interactivity to succeed as a concept, it must have some meaningful social and psychological relevance beyond its technical status as a property of media systems or message exchanges.  相似文献