The impact of reading material’s lexical accessibility on text fading effects in children’s reading performance     

Telse Nagler  Jan Lonnemann  Janosch Linkersdörfer  Marcus Hasselhorn  Sven Lindberg 《Reading and writing》2014,27(5):841-853

The acceleration phenomenon (AP) is defined by improvements in reading speed and reading comprehension, induced by an artificial text fading procedure corresponding to the previously determined fastest individual reading rate. Recent results, however, indicated that fading that is slower than the self-paced reading rate can produce comparable reading enhancements. As reading performance can be strongly influenced by the reading material, this study aimed at investigating to which extent reading enhancements induced by text fading depend on the reading material’s characteristics. We confronted 39 German third graders with a previously utilized text fading procedure, which was slower than their self-paced reading rate. Included text varied regarding to the lexical accessibility (LA), representing how well information can be accessed from the mental lexicon. Children’s reading rates increased statistically significant due to text fading for all LA levels. However, reading comprehension was sensitive to the text material’s characteristics: Reading comprehension enhancements were observable for easily accessible reading material, but not for material with intermediate or difficult levels of LA. Material that was difficult to retrieve from the mental lexicon even resulted in reduced reading comprehension in the fading condition. Possible influences on immediate lexical access, the impact of working memory capacity and implications for future AP research are discussed.  相似文献   

Does sensitivity to orthographic regularities influence reading and spelling acquisition? A 1-year prospective study     

Josefine Rothe  Gerd Schulte-Körne  Elena Ise 《Reading and writing》2014,27(7):1141-1161

Recent studies focused on the influence of orthographic processing on reading and spelling performance. It was found that orthographic processing is an independent predictor of reading and spelling performance in different languages and children of different ages. This study investigated sensitivity to orthographic regularities in German-speaking children (N = 31) prior and during formal reading and spelling instruction. In addition, the relationship between sensitivity to orthographic regularities and reading and spelling performance was explored. Two aspects of children’s sensitivity to orthographic regularities (sensitivity to frequent double consonants and sensitivity to legal positions of double consonants) were measured with a nonword forced choice task. The results show that sensitivity to orthographic regularities improved significantly from kindergarten to first grade. Moreover, children’s sensitivity to orthographic regularities at the end of first grade accounted for a significant amount of unique variance in their reading and spelling performance. These results suggest that orthographic sensitivity on a sublexical level is important for the development of reading and spelling skills.  相似文献   

The Nature and Role of Thought Experiments in Solving Conceptual Physics Problems     

Şule Dönertaş Kösem  Ömer Faruk Özdemir 《Science & Education》2014,23(4):865-895

This study describes the possible variations of thought experiments in terms of their nature, purpose, and reasoning resources adopted during the solution of conceptual physics problems. A phenomenographic research approach was adopted for this study. Three groups of participants with varying levels of physics knowledge—low, medium, and high level—were selected in order to capture potential variations. Five participants were selected within each level group and the study was conducted with fifteen participants in total. Think aloud and retrospective questioning strategies were used throughout the individually conducted problem solving sessions to capture variations in the participants’ thinking processes. The analysis of the data showed that thought experiments were actively used cognitive tools by participants from all there levels while working on the problems. Four different thought experiment structures were observed and categorized as limiting case, extreme case, simple case, and familiar case. It was also observed that participants conducted thought experiments for different purposes such as prediction, proof, and explanation. The reasoning resources behind the thought experiment processes were classified in terms of observed facts, intuitive principles, and scientific concepts. The results of the analysis suggested that thought experiments used as a creative reasoning tool for scientists can also be a productive tool for students. It was argued that instructional practices enriched with thought experiments and related practices not only reveal hidden elements of students’ reasoning but also provide students opportunities to advance their inquiry skills through thought experimentation processes.  相似文献   

What is not working in working memory of children with literacy disorders? Evidence from a three-year-longitudinal study     

Anne Fischbach  Tanja Könen  Chantal S. Rietz  Marcus Hasselhorn 《Reading and writing》2014,27(2):267-286

The goals of this study were to explore the deficits in working memory associated with literacy disorders (i.e. developmental disorders of reading and/or spelling) and the developmental trajectories of these working memory deficits. The performance of 28 children with literacy disorders was compared to a non-disabled control group with the same group size at five bi-annual times of measurement in a three-year-longitudinal study beginning at the end of primary school (9.5 years of age). Storage capacity and central-executive working memory were assessed in phonological and visual-spatial modalities, the latter under static and dynamic conditions. Overall, children with literacy disorders were outperformed by their typical developing peers in all phonological and in dynamic visual-spatial storage and central-executive tasks except for the static visual-spatial storage task. Results at single times of measurement revealed that the most consistent deficit was found in the storage capacity of the phonological loop. An additional central-executive impairment is supported by low backward spans. The causes for output deficits in dynamic visual-spatial tasks and good performance under static visual-spatial condition are discussed.  相似文献   

Phases of Mediatization     

Josef Seethaler 《Journalism Practice》2014,8(3):258-278

As election campaigns changed substantially in Western countries, it is generally hypothesized that this change in campaign communication is rooted in a revolution in communications, with the media rejecting its former role as mere transmitters and becoming a major actor in the campaigning process. Regarding the analysis of the “mediatization of politics”, Strömbäck presented a four phases model which offers a way to explore such a process in an explicit and systematic fashion. The resulting struggle between political parties and the media over who shall control the agendas of campaigns forces politicians to adapt to and, finally, to adopt media logic. By operationalizing these four phases in order to allow for empirical research, we investigated the roles of the news media and the political parties in Austrian campaign communication in the last four decades. Taking the agenda-setting power as an indicator for changes in this relationship, our study is based on the concepts of agenda-building and policy agenda-setting as extensions of the agenda-setting model. To establish party and media agendas, a content analysis was conducted on news releases of all Austrian parliamentary parties, the main evening newscasts of all Austrian broadcasters, as well as the political coverage of two quality papers and two major tabloids during the “hot phase” of the campaign. For examining the “struggle over agendas”, a time-series cross-section design (including data on 20 different policy dimensions) was applied. First results are based on the analysis of five election campaigns in 1970, 1983, 1990, 1999, and 2008.  相似文献   

Editorial     

Beat F. Schmid  Peter Glotz  Peter Gomez  Dörte Wittig 《媒体管理杂志》2013,15(2)

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Trivializing the News? Affective Context Effects of Commercials on the Perception of Television News     

Werner Wirth  Jörg Matthes 《Mass Communication and Society》2013,16(2):139-156

This study examined whether affect induced by television commercials influences the perception of news programming. An experiment showed that viewers in positive moods generated by television commercials perceive news stories viewed both after and before watching the commercials as more entertaining, relaxing, realistic, and more credible than viewers exposed to neutral commercials do. Of interest, viewers in positive mood, as compared to neutral mood, perceived the topic presented in the news story as less important and serious.  相似文献   

Realism as part of pragmatism     

Sami Pihlström 《Metascience》2014,23(3):565-572

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Deformability-based red blood cell separation in deterministic lateral displacement devices—A simulation study     

Timm Krüger  David Holmes  Peter V. Coveney 《Biomicrofluidics》2014,8(5)

We show, via three-dimensional immersed-boundary-finite-element-lattice-Boltzmann simulations, that deformability-based red blood cell (RBC) separation in deterministic lateral displacement (DLD) devices is possible. This is due to the deformability-dependent lateral extension of RBCs and enables us to predict a priori which RBCs will be displaced in a given DLD geometry. Several diseases affect the deformability of human cells. Malaria-infected RBCs, for example, tend to become stiffer than their healthy counterparts. It is therefore desirable to design microfluidic devices which can detect diseases based on the cells'' deformability fingerprint, rather than preparing samples using expensive and time-consuming biochemical preparation steps. Our findings should be helpful in the development of new methods for sorting cells and particles by deformability.  相似文献   

Instructional Leadership in Compulsory Schools in Iceland and the Role of School Principals     

Börkur Hansen  Steinunn Helga Lárusdóttir 《Scandinavian Journal of Educational Research》2013,57(5):583-603

The purpose of this paper is to present findings from a study of instructional leadership in 20 Icelandic compulsory schools. More specifically, the perceptions of staff concerning supervision of instruction, and the views of principals regarding their role as supervisors of instructional development. Data was collected with questionnaires from staff and interviews with principals. The approach was based on a mixed-methods design. The findings indicate that supervision of instruction differs between the schools. Principals provide for little direct supervision of teachers, however, they provide considerable indirect supervision. The supervision of instruction suggests that collegial supervisory emphasis is considerable in most of the schools. The collegial model, however, emphasizes systematic collection of data on what happens in classrooms, an important element that is largely neglected in the Icelandic schools.  相似文献