Increasing cheat robustness of crowdsourcing tasks     

Carsten Eickhoff  Arjen P. de Vries 《Information Retrieval》2013,16(2):121-137

Crowdsourcing successfully strives to become a widely used means of collecting large-scale scientific corpora. Many research fields, including Information Retrieval, rely on this novel way of data acquisition. However, it seems to be undermined by a significant share of workers that are primarily interested in producing quick generic answers rather than correct ones in order to optimise their time-efficiency and, in turn, earn more money. Recently, we have seen numerous sophisticated schemes of identifying such workers. Those, however, often require additional resources or introduce artificial limitations to the task. In this work, we take a different approach by investigating means of a priori making crowdsourced tasks more resistant against cheaters.  相似文献   

Gustavo Bueno: Sciences as Categorical Closures     

Íñigo Ongay de Felipe 《Science & Education》2013,22(9):2347-2349

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The COVID-19 epidemic in Brazil: how statistics education may contribute to unravel the reality behind the charts     

da Silva  Alexandre Sousa  Barbosa  Maria Tereza Serrano  de Souza Velasque  Luciane  da Silveira Barroso Alves  Davi  Magalhães  Marcos Nascimento 《Educational Studies in Mathematics》2021,108(1-2):269-289

Educational Studies in Mathematics - The world is now facing the most severe health, social, and economic event of the last hundred years, which has made the need to acquire statistical thinking to...  相似文献   

Cortisol levels of caregivers in child care centers as related to the quality of their caregiving     

Elles J. de Schipper  J. Marianne Riksen-Walraven  Sabine A.E. Geurts  Carolina de Weerth 《Early childhood research quarterly》2009

The present study examined whether stress in professional caregivers – as reflected in salivary cortisol levels – is related to the quality of their caregiving behavior. The 221 professional female caregivers in 64 child care centers were observed in three different situations and saliva samples were taken three times during the morning. Results showed that higher levels of cortisol, particularly at the beginning of the workday, predicted lower-quality caregiver behavior beyond the contribution of three other predictors, namely a higher self-reported physical workload, more children under age two in the care group, and lower caregiver age. Contrary to the expectation, higher cortisol levels did not mediate the relation between higher self-reported physical workload and more children under age two on the one hand and lower-quality caregiving behavior on the other.  相似文献   

Mi Superheroe/Heroina: Una Composicion Controlada En Ingles     

M. Paz de la Serna 《Cultura y Educación》2013,25(14):125-126

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What Can Be Learned from Computer Modeling? Comparing Expository and Modeling Approaches to Teaching Dynamic Systems Behavior     

Sylvia P. van Borkulo  Wouter R. van Joolingen  Elwin R. Savelsbergh  Ton de Jong 《Journal of Science Education and Technology》2012,21(2):267-275

Computer modeling has been widely promoted as a means to attain higher order learning outcomes. Substantiating these benefits, however, has been problematic due to a lack of proper assessment tools. In this study, we compared computer modeling with expository instruction, using a tailored assessment designed to reveal the benefits of either mode of instruction. The assessment addresses proficiency in declarative knowledge, application, construction, and evaluation. The subscales differentiate between simple and complex structure. The learning task concerns the dynamics of global warming. We found that, for complex tasks, the modeling group outperformed the expository group on declarative knowledge and on evaluating complex models and data. No differences were found with regard to the application of knowledge or the creation of models. These results confirmed that modeling and direct instruction lead to qualitatively different learning outcomes, and that these two modes of instruction cannot be compared on a single “effectiveness measure”.  相似文献   

How to foster collaborative learning in communities of teachers and student teachers: Introduction to a special issue     

W. Admiraal  S. F. Akkerman  R. de Graaff 《Learning Environments Research》2012,15(3):273-278

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Emotion work and emotional exhaustion in teachers: the job and individual perspective     

Gérard Näring  Peter Vlerick  Bart Van de Ven 《Educational studies》2012,38(1):63-72

Teaching requires much emotion work which takes its toll on teachers. Emotion work is usually studied from one of two perspectives, a job or an individual perspective. In this study, we assessed the relative importance of these two perspectives in predicting emotional exhaustion. More than 200 teachers completed a questionnaire comprising the DISQ (Demand‐Induced Strain Compensation Questionnaire), the Dutch Questionnaire on Emotional Labour (D‐QEL), and the UBOS (Utrechtse Burnout Schaal [Utrecht Burnout Scale]). In line with previous studies, our findings indicated that emotional exhaustion is positively associated with emotional job demands and surface acting. The relative importance of the two operationalisations of emotion work was assessed by comparing the results of two regression analyses. Whereas the model with job demands explained 18% of the variance, the model with emotional labour explained only 5%. In understanding what might contribute to emotional exhaustion in teachers, the emotional job demands might be much more important than the self‐regulation perspective that is measured with emotional labour.  相似文献   

Entertainment Education and social change: Evaluating a children's soap opera in Kenya     

Liesbeth de Block 《International Journal of Educational Development》2012

This article discusses audience responses to a children's soap opera produced and broadcast in Kenya. It examines the evaluation process in relation to qualitative audience research within Cultural Studies. It challenges an Entertainment–Education model of media as vehicles for messages and links strongly with Communication for Social Change priorities in which media are the facilitators. In such an approach this soap opera should not only fit into the cultural and social contexts of its child audience but should actively promote discussion and the interactive negotiation of meaning. The narratives address post conflict concerns of democracy, rights, peace and reconciliation, encouraging dialogue with peers and family about extremely difficult issues. The question is how we evaluate and assess such processes.  相似文献   

Teachers' expectations of teacher–student interaction: Complementary and distinctive expectancy patterns     

R.J. de Jong  J. van Tartwijk  N. Verloop  I. Veldman  T. Wubbels 《Teaching and Teacher Education》2012

In this study it is investigated what student responses teachers expect in particular teacher behaviour vignettes, and whether experience and gender produce differences in expectations. Teacher behaviour vignettes were presented to teachers (N = 46), who described the student responses they anticipated. Anticipated student responses were then rated on their level of control and affiliation. Results indicated teachers' expectations were indeed complementary except for hostile vignettes, where teachers expected more submissive responses than other populations. There were no significant differences as a result of experience, however, female teachers expected friendlier responses than male teachers in friendly as well as in hostile vignettes.  相似文献