Incidental Vocabulary Acquisition: A Literature Review

Introduction to Vocabulary Acquisition Research

For several decades, second language acquisition research revolved primarily around strategies of generative learning rather than vocabulary-acquisition learning. Laufer and Rozovski-Roitblat (2011) — noted scholars in the field — acknowledge that until the later part of the 20th century, the emphasis was largely placed on constructing a rules-based use of language that could ultimately facilitate vocabulary expansion. By contrast, they observe, increasing emphasis on the value of language acquisition strategies has prompted a host of investigations into which methods are most effective. Their article, "Incidental vocabulary acquisition: The effects of task type, word occurrence and their combination," published in Language Teaching Research, Vol. 15, No. 4, is one such exploration. The article is intended to measure the effectiveness of specific task types as they pertain to students' success in achieving adequate levels of vocabulary acquisition.

Laufer and Rozovski-Roitblat (2011): Task Type and Word Occurrence

The study, based in Haifa, Israel, made its primary focus the issue of long-term vocabulary retention among students with intermediate-level English skills. Learners were divided into two groups distinguished by different task approaches to their shared learning goal. As Laufer and Rozovski-Roitblat explain, "the tasks were: reading a text with occasional Focus on Form when learners used dictionaries (T+F), or reading a text with Focus on Forms, i.e. word focused exercises (T+Fs)" (Laufer & Rozovski-Roitblat, p. 391).

By distinguishing sample populations according to either the occasional or constant presence of focus-on-form strategies — and between the use of a dictionary versus word-focused exercises — Laufer and Rozovski-Roitblat take the position that there is a greater opportunity for linguistic acquisition when the learner is more directly engaged in a specific and directed task than when simply attempting to contextualize and define vocabulary in question. As the researchers argue at the outset of the study, while immediate retention of vocabulary may be positive with a dictionary-and-definition strategy, more dynamic and active task orientation may be a stronger determinant of long-term retention — and, in turn, of proficiency in usage.

Study Design and Methodology

This is an important point where broader research interests are concerned. The study by Laufer and Rozovski-Roitblat suggests that there may be a direct connection between the degree of active engagement of English-language learners and their ability to convert that engagement into usable vocabulary and, ultimately, linguistic fluency. The research set out to demonstrate this by administering a pattern of unannounced tests over the duration of a 13-week course. Over this period, learners were given 60 target words. The method of delivery depended upon whether the subject was placed in the T+F or the T+Fs group. Testing was structured around different "task × occurrence" combinations, differentiated by the frequency with which target terms appeared. As the article reports, target words occurred 2–3, 4–5, and 6–7 times, depending on the stage of the course.

Min (2008): Reading Plus Vocabulary Enhancement Activities

Language acquisition is a process that requires an evolving understanding of syntax, a growing ability to translate mnemonic devices into working knowledge, and a continuing enhancement of one's vocabulary. It is this third dimension of the process that is of particular relevance to the study by Min (2008). Min's "EFL Vocabulary Acquisition and Retention: Reading Plus Vocabulary Enhancement Activities and Narrow Reading," published in Vol. 58, No. 1 of Language Learning, reports on growing interest in methods of linguistic contextualization as a way of building improved vocabulary in non-native English learners. Using a sample population of children studying English in schools in Taiwan, the article identifies reading activities as the most effective way to help construct the type of vocabulary required to meet basic English expectations.

According to Min, even as interest in improving English aptitude grows in Taiwan, there is a pattern of relatively inadequate preparation for students entering EFL secondary high schools. Min sets the baseline of vocabulary adequacy at the capacity of students to comprehend the basic vocabulary featured in most English textbooks used in that high school setting. With roughly 3,000–5,000 word families represented, Min indicates that most students are not given sufficient preparation in vocabulary acquisition to facilitate successful use of such materials. Min identifies a problem area of continuing research interest: the failure of currently popular vocabulary acquisition strategies to prepare students for the scope of vocabulary they will ultimately encounter if they are to successfully use acquired English skills.

Min's research is grounded in the theoretical construct of input-oriented language acquisition, which holds that English learners will be more capable of making connections between meaning and form when processing occurs within a meaningful context. For this reason, the article espouses the strategic use of reading and reading-based activities as a way of not simply gathering the needed scope of vocabulary but also retaining its intended meaning and associated usage patterns. Min points out that this approach has been challenged for failing to provide what is perceived as the necessary balance between contextualization and basic word-based activity. It is for this reason that Min sets forth with the current research, intending to add evidence in support of the argument that vocabulary acquisition through contextual reading must be supplemented by enhanced reading, which involves word-related activities.

The article concedes that "despite the general consensus among researchers that reading is one important source for acquiring vocabulary, the effectiveness (whether learners can correctly infer the meaning of an unknown word during reading and retain it afterwards) and efficiency (how many exposures are required to ensure successful vocabulary acquisition and retention) of this approach has been seriously challenged, especially when it is compared with reading plus supplementary word-focused activities and applied in an instructed foreign language context" (Min, p. 73).

In a study using two groups of twenty-five third-year male students identified as having intermediate-level English proficiency, participants were divided according to reading instruction methodology. The groups were distinguished by those who participated in enhanced reading with word-based activities and those who participated in what the researcher called "narrow reading," which occurred without supplementary instruction. Both groups were asked to retain the same set of fifty selected vocabulary words. Min found that those in the former group — denoted the "RV" group — performed significantly better than those in the "NR" group. As Min explains, "the results show that the RV group demonstrated significantly more knowledge about the target vocabulary than the NR group on the acquisition and retention tests. The researcher concludes that reading plus focused vocabulary exercises are more effective and efficient than the narrow reading approach in enhancing target vocabulary acquisition and retention among EFL secondary students" (Min, p. 75).

Min goes on to suggest that the value of this study lies in its endorsement of strategies aimed at improving the supplemental instruction used to complement reading activities. Moreover, the study contributes the notion that the deficiencies shown by students entering EFL secondary high schools may result from a narrow reading strategy that does not do enough to optimize the retention of meaning and usage.

Conclusion and Broader Implications

Indeed, as Min acknowledges in reflecting on the study's findings, the distinct value of this research and the source of its conclusions may lie in its nuance. Researchers sought not only to investigate students' ability to define or recall certain vocabulary terms, but also to evaluate their understanding of function, meaning, and usage. In this evaluation, Min sufficiently demonstrates that an effective strategy for assisting in the process of language acquisition must also account for these critical areas of linguistic development. This makes the study by Min distinctly useful to broader research purposes by providing empirical evidence of the consequences of failing to guide vocabulary acquisition effectively.

Taken together, both studies reviewed here — Laufer and Rozovski-Roitblat (2011) and Min (2008) — contribute meaningful empirical support for the argument that active, task-oriented, and contextually enriched engagement with target vocabulary is superior to passive or definition-only exposure strategies. Their findings together suggest that the most productive path toward second language vocabulary acquisition and long-term retention lies in combining meaningful reading contexts with focused, word-level activities designed to deepen comprehension and reinforce functional usage.

Works Cited

Laufer, B. & Rozovski-Roitblat, B. (2011). Incidental vocabulary acquisition: The effects of task type, word occurrence and their combination. Language Teaching Research, 15(4), 391–411.

Min, H.T. (2008). EFL vocabulary acquisition and retention: Reading plus vocabulary enhancement activities and narrow reading. Language Learning, 58(1), 73–115.