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41.
Four experiments explored the composition and stability of internalorthographic representations of printed words. In three experiments,subjects were presented on successive occasions with words that wereconsistently spelled correctly or were consistently misspelled. On thesecond presentation, subjects were more likely to judge both kinds ofwords as correctly spelled than on the first presentation, suggesting thattheir preexperimental orthographic representations had been altered tomatch what they had seen on the first presentation. However, onlymisspellings that were consistent with the correct phonology wereaccepted; spellings that altered the phonology were rarely accepted,suggesting that some parts of the orthographic representation are lessstable than others. Also, subjects' reliance on orthographic vs.phonological memory when judging a word's spelling was affected by thekinds of other misspellings in the list. Lists that contained somephonologically implausible spellings for real words (e.g., *assostance)induced subjects to rely more on phonological plausibility when judgingthe correctness of other words in the list and less on orthographic memory.An individual grapheme in an internal orthographic representation wasunstable when there were many phonologically acceptable alternatives forit. The results are contrary to the view that the strength of an internalrepresentation is uniform across all its graphemes and is a function only ofvisual experience with the printed form. Results were interpreted in thecontext of a theory that considers spelling knowledge to be a by-productof the reading process, a process that involves phonological analysis. 相似文献
42.
This longitudinal study explored the relation betweenpreschool phoneme awareness and initial reading development. Distinctions were made between formal and functional letter knowledge and between foundation and subsequent phases of reading development. 44 children with at least average language comprehension were followed from the beginning of grade 1(7 years) until the end of grade 2. They were divided intotwo groups: one group of 21 children with high phonemic awareness (HPA) and 23 children with low phonemic awareness (LPA) on entering grade 1. The results showed persistent group differences in favour of the HPA children regarding letter-knowledge and word reading. The results confirmed a significant impact of functional letter knowledge on the length of the foundation period and on later reading development. Length of foundation period was shown to have a significant impact on reading development at the end of grades 1 and 2. It is argued that phonemic awareness is an indispensable catalystin the development of initial word processing ability. 相似文献
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45.
Nicole Landi W. Einar Mencl Stephen J. Frost Rebecca Sandak Kenneth R. Pugh 《Annals of dyslexia》2010,60(1):102-121
Using functional magnetic resonance imaging, we investigated multimodal (visual and auditory) semantic and unimodal (visual only) phonological processing in reading disabled (RD) adolescents and non-impaired (NI) control participants. We found reduced activation for RD relative to NI in a number of left-hemisphere reading-related areas across all processing tasks regardless of task type (semantic vs. phonological) or modality (auditory vs. visual modality). Moreover, activation differences in these regions, which included the inferior frontal gyrus, the superior temporal gyrus, and the occipitotemporal region, were largely independent of in-scanner performance in our auditory semantic task. That is, although RD participants and NI participants differed in performance in visually presented conditions, they did not differ significantly in the auditory condition, yet similar patterns of reduced activation were observed in these regions across conditions. These findings indicate a neurobiological marker in RD that is independent of task, modality, or performance. These findings are discussed in the context of current neurobiological models of RD. 相似文献
46.
Leadership, governance, and management are frequently conceptualized as conflictory institutional logics. The recent shift to a ‘new managerialism’ in universities, for example, clearly favors business-like leadership and management styles over collegial governance practices. This article provides a micro foundation of leadership, governance, and management in universities based on the underlying communication of strategic issues among governing bodies. Reporting on a longitudinal case study of a comprehensive reorganization of a German university, it illustrates how institutional logics translate into micro patterns of communication. The findings suggest that leadership, governance, and management are not necessarily conflictory but reflect in four complementary micro patterns. Rather than ‘managerialism’ replacing ‘collegialism,’ organizational change unfolds in oscillating sequences of these four micro patterns. The findings furthermore indicate that the strategic issues of research and teaching at the university’s core remain largely autonomous, despite their increasing managerial regulation. 相似文献
47.
Robert A. Frost 《Community College Journal of Research & Practice》2013,37(9):710-723
Globalization is a highly contested notion of the rapid changes taking place through the movement of labor, capital, communications, and information transcending all previous notions of borders and similarly defined territories. Historically, community college missions have been limited by their district borders. This study presents findings from interviews at a small, midwestern community college that indicate how community colleges provide human resources and social development functions that support private industries. This indicates that the effects of globalization at the local level are being offset at public expense. The paper concludes with a reconsideration of the community college mission in the early 21st century. 相似文献
48.
K Reshma V Rao Ashalatha M Dinesh DM Vasudevan 《Indian journal of clinical biochemistry : IJCB》2005,20(1):160-164
Flavonoids extracted from the leaves of Indian holy basil, Ocimum sanctum showed promising results as radioprotector in rodents.
Hence it was thought pertinent to analyze the antioxidants of erythrocytes in oral cancer patients who were concurrently treated
with radiation and ocimum flavonoids. Oral cancer patients consisted of 2 groups. Group A (n=17) received radiation alone
while Group B(n=17) received radiation and ocimum flavonoids(OF). Samples of heparinised blood were collected prior to treatment,
15 and 30 days respectively after treatment. Blood from normal healthy volunteers were taken as controls (n=25). Erythrocytes
were analyzed for the antioxidants viz. glutathione, glucose 6 phosphate dehydrogenase, glutathione peroxidase and superoxide
dismutase by the standard methods. Results of analysis indicated that erythrocytes from cancer patients (Group A and B) had
significantly high glutathione levels before as well as after treatment compared to controls. It was observed that Group B
which received OF showed a significant reduction in glutathione levels in comparison with Group A. All the other parameters
showed no statistical significant changes. Results of the study suggest that erythrocytes from cancer patients responded to
oxidative stress by elevating glutathione levels, while a decrease in glutathione levels observed in Group B, could be due
to the free radical scavenging effect of OF, sparing the glutathione. However OF did not seem to exert its effect on other
antioxidants of erythrocytes. 相似文献
49.
Catherine Frost 《The Information Society》2006,22(1):45-49
Might online social relations play a role in the rise of political solidarities sufficient to support a democratic postnationalist project? As things currently stand, it does not appear that the Internet supports either the commitment or cohesiveness needed to underpin a demanding new mode of social and political relations. Looking at factors such as conceptions of community and social interaction, systems of meaning, political engagement, and social inclusivity can help us assess the question. The exercise suggests that while the Internet may be a factor in change, it may not yield the kind of change many are anticipating. This finding raises doubts concerning the postnationalist hope that new social and political bonds will help ground transnational projects such as the European Union. 相似文献
50.
Frost DM Cronin JB Newton RU 《Sports biomechanics / International Society of Biomechanics in Sports》2008,7(3):372-385
Explosive upper-body movements, with which the load is not thrown (non-ballistic), may comprise a phase during which forces are produced in opposition to the motion of the load. Thirty men completed three test sessions (free weight, ballistic, and pneumatic), each consisting of a one-repetition maximum (1-RM) and four explosive repetitions of a bench press at six loads (15, 30, 45, 60, 75, and 90% 1-RM). The end of the lifting phase for the non-ballistic conditions (free weight and pneumatic) was defined by: the point of peak barbell displacement and the point at which the vertical force became negative (positive work). When analysed by peak displacement, the ballistic condition elicited significantly greater mean velocity, force, and power at loads of 15-60% 1-RM compared with the free weight condition. When the period of negative work was removed, the mean free weight velocity, force, and power at loads below 60% 1-RM increased. Consequently, the only differences between the free weight and ballistic conditions were found at loads of 15% and 30% 1-RM. Including a period of negative work may underestimate all kinematic and kinetic variables dependent on the time to, or position of, the end of the lifting phase, for non-ballistic efforts. 相似文献