1. 研究目的与意义（文献综述包含参考文献）

literature review

the notion of accuracy, and fluency are two dimensions for describing language performance, being used to describe performance by l1 and l2 learners (pallotti, 2009). they are factors for describing language performance, most frequently used as dependent variables to assess variation with respect to independent variables such as acquisitional level or task features (pallotti, 2009). due to the limitation in l2 learners#8217; attentional resources, they put priority in accuracy and fluency while dealing with oral tasks and these two dimensions are linked but compete with each other (skehan, 1998).

fluency is considered as a significant component of communicative language ability, which puts emphasis on the moderate and fluent speeches. much research have done on the fluency on both first and second language learners. fillmore (1979, p. 256) pointed out four types of fluency in as ”the ability to keep the speech flow going” ”the ability of pack meaning in a coherent fashion into discourse” ”the ability to say something appropriate to situation interlocutor etc. and not be tongue-tied or lost for words” and ”the ability to be witty and imaginative”. faerch et al. (1984) distinguished three factors in fluency, which were the fluency in semantics, in vocabulary and grammar, and in pronunciation. sajavarra (1987) considered the language acceptability and coherence are two factors in fluency. according to wenzhong zhang (2001, p. 343), ”continuity” ”coherence” and ”acceptability” are three aspects in evaluating the fluency in oral performance of second language learning.

2. 研究的基本内容、问题解决措施及方案

methodology

the object of the study is to find out the relationship between these two dimensions by using corelative analysis. by studying this, the research is aimed to solve the following questions:

1. what is the relationship between sr and pe100 in efl learners#8217; impromptu speeches?