交际性语言测试理论与新CET-4写作测试

交际性语言测试以测试交际能力为宗旨。具体到写作命题，它侧重命题本身的交际性。大学英语四级（CET-4）对促进大学英语教学功不可没，但其写作部分在命题、任务类型、评分标准等方面受到众多质疑。新CET-4交际性写作命题必将对写作教学产生积极的反拨作用。     

Covariate Adjusted Correlation Analysis via Varying Coefficient Models

Abstract.  We propose covariate adjusted correlation (Cadcor) analysis to target the correlation between two hidden variables that are observed after being multiplied by an unknown function of a common observable confounding variable. The distorting effects of this confounding may alter the correlation relation between the hidden variables. Covariate adjusted correlation analysis enables consistent estimation of this correlation, by targeting the definition of correlation through the slopes of the regressions of the hidden variables on each other and by establishing a connection to varying-coefficient regression. The asymptotic distribution of the resulting adjusted correlation estimate is established. These distribution results, when combined with proposed consistent estimates of the asymptotic variance, lead to the construction of approximate confidence intervals and inference for adjusted correlations. We illustrate our approach through an application to the Boston house price data. Finite sample properties of the proposed procedures are investigated through a simulation study.     

Minimum distance lack-of-fit tests for fixed design

This paper discusses a class of tests of lack-of-fit of a parametric regression model when design is non-random and uniform on [0,1]. These tests are based on certain minimized distances between a nonparametric regression function estimator and the parametric model being fitted. We investigate asymptotic null distributions of the proposed tests, their consistency and asymptotic power against a large class of fixed and sequences of local nonparametric alternatives, respectively. The best fitted parameter estimate is seen to be n^1/2-consistent and asymptotically normal. A crucial result needed for proving these results is a central limit lemma for weighted degenerate U statistics where the weights are arrays of some non-random real numbers. This result is of an independent interest and an extension of a result of Hall for non-weighted degenerate U statistics.     

Asymptotically optimal Berry-Esseen-type bounds for distributions with an absolutely continuous part

Recursive and closed form upper bounds are offered for the Kolmogorov and the total variation distance between the standard normal distribution and the distribution of a standardized sum of n independent and identically distributed random variables. The method employed is a modification of the method of compositions along with Zolotarev's ideal metric. The approximation error in the CLT obtained vanishes at a rate O(n^−k/2+1), provided that the common distribution of the summands possesses an absolutely continuous part, and shares the same k−1 (k?3) first moments with the standard normal distribution. Moreover, for the first time, these new uniform Berry-Esseen-type bounds are asymptotically optimal, that is, the ratio of the true distance to the respective bound converges to unity for a large class of distributions of the summands. Thus, apart from the correct rate, the proposed error estimates incorporate an optimal asymptotic constant (factor). Finally, three illustrative examples are presented along with numerical comparisons revealing that the new bounds are sharp enough even to be used in practical statistical applications.     

交际法的语言社会化价值

交际能力的发展需要认知与交际二者互动。在交际功能中,相互触发、相互作用。交际法的互动观突出强调交际的枢纽作用,正是交际驱动了语言社会化的过程。交际驱动了个体的语言社会化,而语言社会化又会加速全面的社会化,包括认知、道德、情感、社会技能等的发展。在交际中发展语言能力,由此也实现充分社会化。     

试论中学语文教学法课程的教学方法——中学语文教学法课程教学改革研究之三

我国近百年来中学语文教学法课教学方法的基本特征是“讲授中心” ,始终没走出重讲授轻训练、重理论轻实践、重分数轻素质的误区。造成这种积久病状的主要原因是 :教学方法受到错误教学目的和内容的制约 ,对教学法课教学方法的理论研究不够 ,实践性教学的管理措施不力 ,教学法课教师自身素质不高。现在必须改革 ,关键是要在教学目的和内容正确的前提下用好 4类共 1 2种基本的教学方法     

CLT与中国农林高校外语教学

始于 70年代的CLT ,作为一种语言教学思想 ,其核心是语言作为一种交际工具来教、来学、来使用。学外语是为了交际 ,教外语就是要培养学习者的交际能力 ,外语教学的过程即学生语言交际能力的习得过程。本文在对CLT理论研究的基础上 ,探讨了农林高校外语教学在实践这一理论的过程中存在的困难和误区 ,并提出了相应的对策。     

以交际教学法为中心的英语听力教学初探

交际教学法以成为培养学习者交际能力的主要教学法,也就是如何教学习者用得体的,可接受的语言进行交际,更适用于听力课堂教学。教师可以利用听力教室的多媒体等现在辅助教学工具,通过组织各种视听活动和各种支配原则下的角色扮演活动来达到提高学生交际能力的目的。