网球正手击球准确性的教具教学实验研究——以哈尔滨体育学院为例     

张旭辉 《哈尔滨体育学院学报》2013,(4):79-82

本文运用文献资料法、实验法等,以哈尔滨体育学院网球专修学生为研究对象进行教具教学实验,并对测试正手击球准确性进行,结果发现,有教具教学的实验组,击球准确性明显高于无教具教学的对照组,且此差距在实验后能持续提高。说明教具的合理使用能为学生练习提供目标和反馈,激发学生练习的积极性,促进学生积极思考,提高学生的学习效率。  相似文献   

The accuracy of student self-assessments of English-Chinese bidirectional interpretation: a longitudinal quantitative study     

Chao Han  Mehdi Riazi 《Assessment & Evaluation in Higher Education》2018,43(3):386-398

The accuracy of self-assessment has long been examined empirically in higher education research, producing a substantial body of literature that casts light on numerous potential moderators. However, despite the growing popularity of self-assessment in interpreter training and education, very limited evidence-based research has been initiated to shed insight into the formative assessment of language interpretation. This longitudinal study was therefore conducted to investigate to what extent student self-assessments of English-Chinese interpretation are accurate and how the accuracy level would change over time. Major findings are: (1) in general self-assessment accuracy improved over time for both interpreting directions; (2) regarding the three scoring dimensions of information completeness, fluency of delivery and target language quality, there was greater self-assessment accuracy for English-to-Chinese interpretation than in the other direction; (3) while information completeness was most accurately self-assessed in English-to-Chinese direction, the pattern was reversed in the opposite direction; and (4) the students tended to over-score the three quality dimensions for Chinese-to-English interpretation at each time point. These results are discussed in the light of the accuracy issue, its longitudinal trend and potential factors affecting the self-assessment of bidirectional interpretation.  相似文献   

Trait anticipatory public speaking anxiety as a function of self‐efficacy expectations and self‐handicapping strategies     

Anne E. Lucchetti  Gina L. Phipps  Ralph R. Behnke 《Communication Research Reports》2013,30(4):348-356

The purpose of this study was to determine if the independent variables of self‐efficacy expectations and self‐handicapping strategies would predict trait anticipatory public speaking anxiety. A model was proposed and tested in which self‐efficacy expectations were found to be significant independent predictors of trait anticipatory public speaking anxiety. Self‐handicapping was not a significant predictor. Implications for future research are discussed.  相似文献   

Cricket fast bowling performance and technique and the influence of selected physical factors during an 8-over spell     

Marc R. Portus  Peter J. Sinclair  Stephen T. Burke  David J.A. Moore  Patrick J. Farhart 《Journal of sports sciences》2013,31(12):999-1011

The aims of this study were to determine the influence of an 8-over spell on cricket fast bowling technique and performance (speed and accuracy), and to establish the relationship of selected physical capacities with technique and performance during an 8-over spell. Fourteen first-grade fast bowlers with a mean age of 23 years participated in the study. Physical capacities assessed were abdominal strength, trunk stability, selected girth and skinfold measures. During the delivery stride, bowlers were filmed from an overhead and lateral perspective (50 Hz) to obtain two-dimensional data for transverse plane shoulder alignment and sagittal plane knee joint angle respectively. Ball speed was measured by a radar gun and accuracy by the impact point of each delivery on a zoned scoring target at the batter's stumps. Shoulder counter-rotation did not change significantly between overs 2 and 8 for all bowlers, but was significantly related to a more front-on shoulder orientation at back foot impact. When the front-on fast bowlers ( n = 5) were isolated for analysis, shoulder counter-rotation increased significantly between overs 2 and 8. Ball speed remained constant while accuracy showed some non-significant variation during the spell. Shoulder counter-rotation was significantly related to accuracy scores during the second half of the 8-over spell. Chest girth and composition and body composition were significantly related to ball release speed at various times during the spell.  相似文献   

全站仪EDM三角高程测量及其精度分析   总被引：1，自引：0，他引：1  

圣少兵 《辽宁科技学院学报》2005,7(3):15-16

阐述全站仪三角高程测量的原理及精度,在此基础上得出达到四等水准测量的精度要求.  相似文献   

一种提高计算机自动赋词标引准确性的综合方法——基于创新型CBA数据库的实证分析     

赵衍  张永娟  陈成材  陈恒 《情报杂志》2012,31(5):185-191

准确性问题一直是困扰计算机自动赋词标引工作的一大难点,很多学者从不同的角度提出了多种提高信息标引准确性的方法。通过比较研究,设计了一种信息标引"前-中-后"综合联动的控制方法来提高计算机自动赋词标引的准确性。该方法由标引前预处理、标引同期控制和后期反馈控制三阶段组成。系统地论述了该方法的原理、特点和实现方式,并在创新型CBA(中国生命科学文摘)数据库中进行实证研究,验证了此方法在提高计算机自动赋词标引准确度方面的有效性。  相似文献   

A conceptual analysis of five measures of metacognitive monitoring   总被引：1，自引：1，他引：0  

Gregory Schraw 《Metacognition and Learning》2009,4(1):33-45

This paper describes five indices of metacognitive monitoring referred to as absolute accuracy, relative accuracy, bias, scatter, and discrimination. I provide definitions, formulae, and a discussion of the underlying construct that each of the five types of scores measures. I discuss the type of information provided by each measure and compare situations in which each measure is most appropriate. Recommendations are made for best measurement practice, as well as directions for future research. Recommendations focus on providing an operational definition of the construct being measured, selecting the most appropriate outcome measure, and using multiple measures whenever possible to triangulate findings.  相似文献   

Effective factors on accuracy of principal diagnosis coding based on International Classification of Diseases,the 10th revision (ICD-10)     

Mehrdad Farzandipour  Abbas Sheikhtaheri  F. Sadoughi 《International Journal of Information Management》2010

Quality of diagnostic data depends on accurate coding. The purpose of this study was to assess the accuracy of principal diagnosis coding and its effective factors. To achieve this aim, three hundred and seventy medical records were randomly selected and recoded blindly (as gold standard). The effects of possible factors on accuracy of coding which was gathered through observation method were analyzed by Chi-square (χ²), Fisher exact test, odds ratio (OR), and confidence interval 95% for OR.  相似文献   

如何提高初学者跳远助跑的准确性   总被引：1，自引：0，他引：1  

唐远金 《四川体育科学》2002,(2):33-33,36

对如何提高跳远助跑的准确性进行分析研究，证明提高跳远助跑准确性的练习方法，分析解决了提高跳远助跑准确性的几个问题，特别是在跳远运动实践中，速度训练效果如何转化为提高跳远助跑准确性进行了详细的理论分析，认识到跳远教学和训练中如何提高助跑的准确性。  相似文献   

Dyslexia speed problems in a transparent orthography     

Serrano F  Defior S 《Annals of dyslexia》2008,58(1):81-95

This study was intended to help clarify the nature of dyslexia in Spanish. A sample of 30 children, 8 to 16 years old, participated in this study. Dyslexic children were compared to two control groups, a chronological age-matched control group and a reading level-matched control group. Measures included nonword and pseudohomophone reading (phonological procedure), homophone choice (orthographic procedure), and phonological awareness tasks (syllabic, intrasyllabic, and phonemic level). For each task, accuracy (error percentage) and performance time were measured. Results showed a deficit in the dyslexic group on all the tasks, which was more evident when time was considered. With the results consistent with studies in other transparent orthographies such as Italian and German, speed problems seem to be more evident and relevant than accuracy problems in Spanish dyslexic children.

Sylvia DefiorEmail:

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