概化理论在结构化面试评分误差中的应用研究   总被引：1，自引：0，他引：1  

胡月星  刘轩  赵郝锐 《西北师大学报》2006,43(4):62-65

应用概化理论对结构化面试的评分误差的控制问题进行了研究。结果表明:结构化面试评分能够较好地反映出被试的真实能力水平,评分具有较高的信度;在保证较高的面试评分信度(0.80)的情况下,建议将考官人数减少至9名,以提高结构化面试的经济性和效率性。  相似文献   

俄罗斯学生汉语补语使用偏误分析     

王媚 《云南师范大学学报(教育科学版)》2008,(4):55-58

汉语句子成分与俄语句子成分存在较大差异,俄语中没有与汉语补语完全对应的概念,并且汉语补语种类繁多,结构复杂,因此,补语是俄罗斯学生汉语学习的一大难点,在汉语补语学习中出现的偏误也较多。文章着重探讨偏误产生的原因,以期对俄罗斯学生汉语补语教学提供帮助。  相似文献   

混合酸(碱)测定结果相对误差的计算     

赖晓绮  李蕾  薛珺 《赣南师范学院学报》2003,(6):42-44

讨论混合酸(碱)滴定体系终点误差与测定结果相对误差之间的关系,对因终点误差带来的测定结果相对误差进行了具体的计算.  相似文献   

Maximal Criterion Validity and Scale Criterion Validity: A Latent Variable Modeling Approach for Examining Their Difference     

Tenko Raykov  Siegfried Gabler  Dimiter M. Dimitrov 《Structural equation modeling》2016,23(4):544-554

This article studies the difference between the criterion validity coefficient of the widely used overall scale score for a unidimensional multicomponent measuring instrument and the maximal criterion validity coefficient that is achievable with a linear combination of its components. A necessary and sufficient condition of their identity is presented in the case of measurement errors being uncorrelated among themselves and with a used criterion. An upper bound of the difference in these validity coefficients is provided, indicating that it cannot exceed the discrepancy between the maximal reliability and composite reliability indexes. A readily applicable latent variable modeling procedure is discussed that can be used for point and interval estimation of the difference between the maximal and scale criterion validity coefficients. The outlined method is illustrated with a numerical example.  相似文献   

自适应有限元方法在凹角域椭圆问题上的应用(英文)   总被引：1，自引：0，他引：1  

汤雁 《天津大学学报(英文版)》2001,7(1)

设计了一种关于线性椭圆近似解问题的自适应有限元方法 ,所考虑的计算过程是找出给定问题的近似解 U使‖ (u-U)‖ L2 (Ω ) ≤δ,其中 u是未知的精确解 ,δ>0是给定的误差容限 .最终目的是设计一种计算方法 ,能自动进行三角剖分 ,且不用关于精确解的先验信息并使相应的近似解满足上述不等式 .在凹角域上分析了此过程 ,且证明了该方法是有效的 .  相似文献   

圆筒弯扭组合变形中弯曲切应变的测量误差分析     

王美芹  吴枝根  刘一华  詹春晓  李昊 《实验技术与管理》2006,23(5):43-45

在实际测量过程中，电阻应变片的贴片位置、栅长大小以及横向效应均会对测量的精确度产生影响。该文从以上3个方面对《材料力学》课程的电测综合性实验——圆筒的弯扭组合实验中，利用全桥接法测量弯曲切应变的误差原因进行了全面分析，指出测量误差主要是由于电阻应变花的敏感栅中心偏离中性轴所致。  相似文献   

Influence of Magnetic Field on the Rectification Process of Binary Heterogeneous Azeotrope     

贾绍义  吴松海李真 贾亮 《天津大学学报(英文版)》2005,11(4):240-244

To improve separate effect of binary heterogeneous azeotrope in the magnetic field with different magnetic induction intensity, the influence of magnetic field on the rectification process of binary heterogeneous azeotrope was investigated with l-butanol-water system. The results show that the composition of liquid-liquid phase equilibrium of l-butanol-water system has definitely changed, the composition of l-butanol in light phase （l-butanol layer） increases by 1. 17%-1.63% and the composition of water in heavy phase （water layer） increases by 1.21%-1.58% under the influence of magnetic field. By separation of magnetization, the composition of l-butanol increases by 0.8%-1.2% and the recovery ratio of 1 -butanol increases by 1.6%-2.5%. Magnetic field has positive effect, however, the magnetized effect is not in proportion to magnetic induction intensity and has an optimum condition, in the range of 0.25 T-0. 3 T.  相似文献   

翻转课堂的误区及路径选择     

杨新燕  查晓虎 《宿州教育学院学报》2021,(1)

翻转课堂作为“互联网+教育”的产物受到了许多学者的青睐,但是在实施过程中翻转课堂的优势并没有真正发挥出来,随着实践的不断深入,翻转课堂的误区越来越明显。文章从厘清翻转课堂的概念出发,发现翻转课堂存在罗列书本内容、翻转形式机械运用、教师职能弱化、评价标准缺失的误区,并提出走出翻转课堂误区的路径,如科学规划教学内容、处理好“放手”与“松手”的关系、培养学生提出问题的能力、完善评价制度,以更好地促进翻转课堂的实施。  相似文献   

Evaluation of True Criterion Validity for Unidimensional Multicomponent Measuring Instruments in Longitudinal Studies     

Tenko Raykov  George A. Marcoulides 《Structural equation modeling》2017,24(4):599-608

Longitudinal studies offer unique opportunities to identify the specificity variance in the components of a psychometric scale that is administered repeatedly. This article discusses a procedure for evaluation of the relationship between true scale scores and criterion variables uncorrelated with measurement errors in longitudinally presented measures comprising unidimensional multicomponent instruments. The approach provides point and interval estimates of the true scale criterion validity with respect to a criterion that is assessed once or repeatedly, as well as a means for testing temporal stability in this validity. The outlined method is based on an application of the latent variable modeling methodology, is readily applicable with popular software, and is illustrated using empirical data.  相似文献   

Discovering the Laws of Sampling     

Keith Rennolls  Michael Massay 《Teaching Statistics》1991,13(3):71-73

That the sample mean and variance are “good” estimates of the corresponding population parameters is easily accepted as “obvious” by students, but the concept of standard error of the mean is often found to be quite a hurdle. That this standard error decreases inversely as the square-root of the sample size, and the mysterious appearance of the Normal distribution, are often taken as magical and incomprehensible effects, and non-mathematical students can often be turned away from further understanding. This article describes a program which provides an experimental framework in which the student can rapidly develop an intuition for the basic properties of sampling.  相似文献