Vocabulary development is indisputably a vital aspect of second language acquisition. In spite of the abundant attention it has garnered over the past few decades, it remains unclear how adult learners fare with intentional and incidental ways of learning. The current study investigated the effects of intentional learning (via studying a word list), incidental learning (via reading), and combined intentional-andincidental learning (via studying a word list followed by reading) conditions on 30 adult learners’ second language vocabulary acquisition. Vocabulary acquisition was measured in terms of percentage gains as well as changes in the depth of vocabulary knowledge. Results showed that while both the intentional and incidental modes of learning led to vocabulary gains, the combined intentional-and-incidental condition resulted in significantly greater gains than either the intentional-only or the incidentalonly condition. No significant differences were found between the incidental-only and intentional-only conditions.

中文翻译：

---

偶然和有意条件下的二语词汇习得研究

词汇开发无疑是第二语言习得的重要方面。尽管在过去的几十年中它获得了广泛的关注，但仍不清楚成人学习者如何以有意和无意的学习方式来学习。当前的研究调查了意向学习（通过学习单词列表），偶然学习（通过阅读）以及意向和偶然学习（通过学习单词列表后阅读）条件对30位成人学习者第二语言词汇习得的影响。词汇习得以百分比增长以及词汇知识深度的变化来衡量。结果表明，尽管有意和无意的学习方式都可以提高词汇量，有意和偶然条件相结合产生的收益要比仅有意或偶然条件产生的收益大得多。仅偶然情况和仅故意情况之间未发现显着差异。