英语论文网

1. Introduction 

1.1 Research Background 
With the coming of  the 21st century, the researches of second language  acquisition have been  undergoing  significant  changes.  The  language  nativism  has  gradually  faded  out.  In contrast,  frequency  effects  proposed  by  usage-based  theories  such  as  connectionism  have regained  their  wider  attention  from  scholars  both  at  home  and  abroad.  But  there  is  essential difference  between  the  new  researches  about  effects  of  frequency  and  previous  ones,  as  the foundations  of  the  new  researches  rely  on  achievements  of  many  new  subjects.  No  matter from psycholinguistics to corpus linguistics or from computer simulation science to cognitive science,  results  show  that  frequency  plays  an  important  role  in  the  process  of  human’s language learning. In the field of second language acquisition, Ellis who is an exponent of this theory  proposes  task  frequency  is  the  decisive  factor  in  language  learning,  having  a  good command of language knowledge does not merely depend on the abstract grammar rules, but also  is  based  on  the  memory  storage  of  the  knowledge  that  learners  have  ever  read  (Ellis, 2002).  Proficient  usage  of  linguistic  knowledge  does  not  rely  on  the  abstract  grammatical rules, but based on the memory of many exemplars that appear in our mind. Frequency effects involve  all  aspects  of  language  acquisition.  To  linguistic  phenomenon  of  different  levels processing  all  rely  on  frequency  knowledge.  Although  frequency  effects  in  these  emerging theories  have  become  a  hot  topic  in  second  language  acquisition  these  years,  the  related studies  are  comparatively  fewer,  even  much  fewer  in  China,  especially  the  researches  on second language writing. Rott (2002) studied the influence of task frequency on vocabulary acquisition and proved that the task frequency that learners’ applied to vocabulary learning is indeed closely related to their vocabulary level. Jensen&Vinther (2003) and Kiewra&Mayer (1991) both studied frequency’s influence on listening  understanding.  They  found  that  task  frequency  was  helpful for improving learners’ listening  comprehension  to  some  extent.  Compared  with  other  language  skills,  scholars  do much more researches on oral English, and most of them attach much more importance to the influence  that  task  frequency  gives  to  the  fluency  of  oral &nb本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。