This paper suggests six areas of vocabulary research which the author believes would be fruitful for future research. They include (1) developing a practical model of vocabulary acquisition, (2) understanding how vocabulary knowledge develops from receptive to productive mastery, (3) getting lexical teaching/learning principles into vocabulary and…

There is current research consensus that second language (L2) learners are able to adequately comprehend general English written texts if they know 98% of the words that occur in the materials. This important finding prompts an important question: How much English vocabulary do English as a second language (ESL) learners need to know to achieve…

As researchers and practitioners are becoming more aware of the importance of multi-word items in English, there is little doubt that phrasal verbs deserve teaching attention in the classroom. However, there are thousands of phrasal verbs in English, and so the question for practitioners is which phrasal verbs to focus attention upon. Phrasal verb…

The scores from vocabulary size tests have typically been interpreted as demonstrating that the target words are "known" or "learned." But "knowing" a word should entail the ability to use it in real language communication in one or more of the four skills. It should also entail deeper knowledge, such as knowing the…

There is a large body of research indicating that L2 learners often have trouble with the word form. Learners often transfer their L1 processing routines over to the L2 in their attempt to process the L2 forms, whether those routines are appropriate to the L2 form system or not. This study explores the problems of learning L2 vocabulary word form…

Despite a number of research studies investigating the Yes-No vocabulary test format, one main question remains unanswered: What is the best scoring procedure to adjust for testee overestimation of vocabulary knowledge? Different scoring methodologies have been proposed based on the inclusion and selection of nonwords in the test. However, there…

There is little dispute that formulaic sequences form an important part of the lexicon, but to date there has been no principled way to prioritize the inclusion of such items in pedagogic materials, such as ESL/EFL textbooks or tests of vocabulary knowledge. While wordlists have been used for decades, they have only provided information about…

To date, there has been little empirical research exploring the relationship between implicit and explicit lexical knowledge (of collocations). As a first step in addressing this gap, two laboratory experiments were conducted that evaluate different conditions (enriched, enhanced, and decontextualized) under which both adult native speakers…

While formal research into the effect various technologies have on vocabulary acquisition is still in its infancy, it is clear that--intentionally or incidentally--students have used various electronic media to learn new words for some time now. Moreover, although it is still far from clear exactly how one acquires vocabulary in a second language…

Nation (2006) has calculated that second language (L2) learners require much more vocabulary than previously thought to be functional with language (e.g., 8,000-9,000 word families to read independently). This level is far beyond the highest graded reader, and would be difficult to explicitly teach. One way for learners to be exposed to…

Following growing interest in vocabulary acquisition, a number of researchers have proposed how learners' vocabulary knowledge can be measured both in terms of how many words they know (vocabulary size) and how well they know those words (depth of knowledge). However, most of the depth measures have addressed only a single depth aspect (often for…

Although the Word Associates Format (WAF) is becoming more frequently used as a depth-of-knowledge measure, relatively little validation has been carried out on it. This report of two validation studies tackles various important WAF issues yet to be satisfactorily resolved. Study 1 conducted introspective interviews regarding students' WAF…

Many studies have shown that reading can have a beneficial effect on second language learning, but relatively few of these have focused on extensive reading in classroom environments over a period of time. This study compares an extensive reading class against a more traditional class involving intensive reading and vocabulary exercises. The…

This article overviews current research on second language vocabulary learning. It concludes that a large vocabulary is necessary to function in English: 8000-9000 word families for reading, and perhaps as many as 5000-7000 families for oral discourse. In addition, a number of word knowledge aspects need to be learned about each lexical item.…

A number of studies have shown that second language learners acquire vocabulary through reading, but only relatively small amounts. However, most of these studies used only short texts, measured only the acquisition of meaning, and did not credit partial learning of words. This case study of a learner of French explores whether an extensive…