A Simple Model to Determine the Efficient Duration of Exams     

Jules L. Ellis 《Educational and psychological measurement》2021,81(3):549

This study develops a theoretical model for the costs of an exam as a function of its duration. Two kind of costs are distinguished: (1) the costs of measurement errors and (2) the costs of the measurement. Both costs are expressed in time of the student. Based on a classical test theory model, enriched with assumptions on the context, the costs of the exam can be expressed as a function of various parameters, including the duration of the exam. It is shown that these costs can be minimized in time. Applied in a real example with reliability .80, the outcome is that the optimal exam time would be much shorter and would have reliability .675. The consequences of the model are investigated and discussed. One of the consequences is that optimal exam duration depends on the study load of the course, all other things being equal. It is argued that it is worthwhile to investigate empirically how much time students spend on preparing for resits. Six variants of the model are distinguished, which differ in their weights of the errors and in the way grades affect how much time students study for the resit.  相似文献   

Memory for Expository Text: the effects of verbal and pictorial enhancements     

Meredyth Daneman  Maralyn Ellis 《教育心理学》1995,15(2):115-126

Previous research has shown that pictures can be effective in enhancing text memory. For example, Waddill and McDaniel (1992) found that pictures depicting detail information in an expository text effectively enhanced recall of those details and pictures depicting relational information effectively enhanced recall of those relations. However, the research on picture enhancement effects raises the question of whether the mnemonic value of pictures is simply a by‐product of having drawn attention to parts of the text through selective repetition of text content. The present study addressed the question by comparing the relative effectiveness of pictures versus simple verbal captions in promoting text memory. The results replicated the Waddill and McDaniel (1992) pictorial enhancement effect. However, the results showed that repeating the targeted information in a verbal caption was as effective as providing a pictorial illustration, thus suggesting that repetition of text content rather than nonverbal pictorial illustrations produced the effect. The findings generalized across three texts that differed in the amount of spatial content they conveyed.  相似文献   

The role of schools in explaining individuals’ subject choices at age 14     

Jake Anders  Morag Henderson  Vanessa Moulton  Alice Sullivan 《牛津教育评论》2018,44(1):75-93

Abstract

The subjects that young people study from age 14 onwards may have important consequences for their future academic and labour market outcomes. These decisions are shaped by the schools in which they find themselves. Schools also face constraints of their own. This paper explores the extent to which individuals’ decisions are affected by the school they attend and to what extent this is affected by the composition of schools in terms of academic attainment, gender, and socioeconomic background. We use multi-level variance decomposition models applied to administrative data on the subjects that young people in mainstream state-funded schools in England study between ages 14 and 16. Our results highlight the important role that constraints on schools play in subject choice decisions. We also note the particular role of attending a non-selective school within a selective schooling district.  相似文献   

Bumble Boosters: Students Doing Real Science     

Golick  Douglas A.  Schlesselman  Diana M.  Ellis  Marion D.  Brooks  David W. 《Journal of Science Education and Technology》2003,12(2):149-152

Bumble Boosters was a lottery grant funded cooperative project between the University of Nebraska – Lincoln Department of Entomology, the Lincoln Public Schools Science Focus Program, and the Lincoln Folsom Children's Zoo. The primary education goal of the project was to create a community of learners to conduct authentic research on bumble bees in Nebraska. Participants were actively engaged in collecting bumble bees and placing nesting domiciles. Internet technology was employed to facilitate networking between project participants. Systematic evaluation was conducted during and after the project.  相似文献   

Teaching about the history and nature of science and technology: An introduction     

Rodger W. Bybee  James D. Ellis  Michael R. Matthews 《科学教学研究杂志》1992,29(4):327-329

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Implementing microcomputers in science teaching     

Dr. James D. Ellis  Paul J. Kuerbis 《Journal of Science Teacher Education》1992,3(3):65-75

Conclusion The most important finding from this study is that if one adheres to the guidelines from the literature on staff development and educational change, teachers can and will change their teaching behaviors. It is very easy, however, to underestimate the time and resources required to implement change in schools. Even a seemingly simple change such as increasing use of educational computing, which teachers can implement in their individual classrooms without an overhaul of schools, is immensely complex and difficult. Helping teachers and schools change requires a systematic effort, with intensive on-going support over a period of three or more years. Science educators, school leaders, and the public must learn that school improvement is not an event but a continual process of renewal and refinement. This study demonstrates the importance of allocating resources to staff development and implementation along with those for curriculum development. Fortunately, the National Science Foundation has recognized the importance of implementation in school improvement by requiring that implementation be an integral part of all curriculum development projects it funds. As Hall (1986) said, “It is not enough to build pretty boxes; what is important is to get the boxes used.” This article is based on work supported by the National Science Foundation under Grant No. MDR-8470061. Any opionions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the National Science Foundation.  相似文献   

Film courses in U.S. colleges and universities     

Jack C. Ellis 《Educational technology research and development : ETR & D》1957,5(1):370-377

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The truth,but not yet: avoiding naïve skepticism via explicit communication of metadisciplinary aims     

Jake Wright 《Teaching in Higher Education》2019,24(3):361-377

ABSTRACT

Introductory students regularly endorse naïve skepticism – unsupported or uncritical doubt about the existence and universality of truth – for a variety of reasons. Though some of the reasons for students’ skepticism can be traced back to the student – for example, a desire to avoid engaging with controversial material or a desire to avoid offense – naïve skepticism is also the result of how introductory courses are taught, deemphasizing truth to promote students’ abilities to develop basic disciplinary skills. While this strategy has a number of pedagogical benefits, it prevents students in early stages of intellectual development from understanding truth as a threshold concept. I argue that we can make progress against naïve skepticism by clearly discussing how metadisciplinary aims differ at the disciplinary and course levels in a way that is meaningful, reinforced, and accessible.  相似文献   

Context-sensitive rules and word naming in Italian children     

Laura Barca  Andrew W. Ellis  Cristina Burani 《Reading and writing》2007,20(5):495-509

The present study examines the role of orthographic complexity on Italian children’s word reading. Two experiments are reported in which elementary school children (3rd and 5th graders) read aloud words containing simple or contextual letter-sound conversion rules. In Experiment 1, both groups of participants read words containing contextual rules more slowly and less accurately than words containing simple, non-contextual rules. Experiment 2 showed that the effect of rule complexity held for low but not high frequency words, on both reading speed and accuracy. No interactions with grade were found. This pattern is in line with previous findings on the effects of rule contextuality on adult performance [Burani, C. Barca, L. & Ellis, A. W. (2006). Psychonomic Bulletin & Review, 13, 346–352]. Despite the regularity of the Italian orthography, the presence of complex rules influences both reading speed and accuracy of young readers. Moreover, the reading system of readers of a shallow orthography seems efficient from the first years of reading instruction.  相似文献   

Computer-managed instruction in Naval technical training     

Nick Van Matre  John Ellis  William Montague  Wallace Wulfeck 《Instructional Science》1992,21(4):295-311

Based on the success reported by the behaviorally oriented programmed instruction movement in the 1960s, the Navy in the late 1960s and early 1970s began to individualize and self-pace a number of their high student throughput apprentice training courses. To facilitate self-pacing the Navy set up a centralized computer-managed instruction (CMI) system to manage self-paced courses. This paper describes the evolution of that CMI system, reviews a number of studies done on the system over 10 years (many of which were published as internal technical reports with restricted distribution), describes the demise of the system, and discusses future directions of self-paced and individualized instruction.  相似文献