二语阅读中生词密度对附带词汇习得效率的影响研究

发布时间：2018-11-28 17:51

【摘要】：二语阅读中的词汇附带习得一直是二语习得研究关注的一个重要方面，其中，生词密度被认为是影响阅读中的词汇附带习得的一个重要因素，有研究认为生词密度是导致研究阅读中附带习得的实证研究中习得率不同的重要原因之一。现有研究认为，当生词密度太高时，学习者的注意力分散以及语境支持减少，导致词汇学习费时低效；而当生词密度太低时，学习者能够从阅读中学习的生词有限，同样影响到词汇的附带习得，因此研究普遍认为，适于阅读中词汇附带习得的生词密度应该是是一个适中的范围，例如2%~5%之间，但未获实证研究证实。本研究通过实验的方式，观察四组相同水平受试通过阅读四种不同生词密度（2%，，4%，6%，8%）的材料获得的即时和长期词汇附带习得效率，以期为验证适于词汇附带习得的阅读材料的生词密度是否应为适中的范围提供实证证据，并为旨在通过阅读提高词汇量的学习者在选择适宜的阅读材料时提供一种挑选阅读材料的方式。实验结果表明：在即时和延时测试中，生词密度为4%实验组习得效率最高，提示对于阅读中的附带词汇习得而言，4%是一个合适的生词密度；在即时测试中，6%实验组表现良好，习得效率仅次于4%实验组，但在延时测试测试中，习得效率下降明显，落于2%实验组之后，提示对长期记忆而言，2%~4%生词密度区间效果可能好于4%~6%区间。
[Abstract]:Incidental vocabulary acquisition in second language reading has always been an important aspect of second language acquisition. Among them, the density of new words is considered to be an important factor affecting incidental vocabulary acquisition in second language reading. Some studies suggest that the density of new words is one of the important reasons for the different acquisition rates in the empirical study of incidental acquisition in reading. Current studies suggest that when the density of new words is too high, learners' attention and contextual support are reduced, which leads to time-consuming and inefficient vocabulary learning. However, when the density of new words is too low, the learners can only learn new words from reading, which also affects incidental vocabulary acquisition. Therefore, it is generally believed that the density of new words suitable for incidental vocabulary acquisition in reading should be a moderate range. For example, between 2% and 5%, but not confirmed by empirical research. In this study, we observed the incidental efficiency of immediate and long-term vocabulary acquisition of four groups of subjects at the same level by reading four different kinds of new word densities (2%). In order to verify whether the density of new words in reading materials suitable for incidental vocabulary acquisition should be of moderate scope, It also provides a way for learners to choose suitable reading materials for improving their vocabulary through reading. The experimental results show that the experimental group has the highest acquisition efficiency when the density of new words is 4% in both instant and delay tests, suggesting that 4% is an appropriate density of new words for incidental vocabulary acquisition in reading. In the instant test, 6% of the experimental group performed well, and the acquisition efficiency was second only to 4% of the experimental group. However, in the delayed test, the acquisition efficiency decreased significantly, falling behind 2% of the experimental group, suggesting that for long-term memory, 2 the effect of 4% new word density interval may be better than that of 4% / 6% interval.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：H09

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