Vocabulary learning is a crucial aspect of acquiring building blocks in second language acquisition, and its impact on proficiency has garnered significant interest among researchers, teachers, and materials developers. Once considered a neglected area, vocabulary has reclaimed its position in language teaching, with educators shifting focus from accuracy to fluency. This evolution has led to the recognition of two major types of teaching programs:
incidental vocabulary teaching and learning, and the deliberate approach. These two types are not mutually exclusive but rather complementary, employing different strategies and combinations to facilitate word acquisition.
Goals for vocabulary learning often involve considering the number of words in the target language, the number of words known by native speakers, and the number of words required for using another language. It's important to note that even native speakers don't know all the words in a language, making the goal of knowing every word in a target language exceptionally difficult. The efficiency of learning, whether deliberate or incidental, is achieved by following one or more vocabulary learning strategies, which researchers examine from various perspectives.
Deliberate Vocabulary Learning: Focused Effort and Explicit Instruction
Deliberate vocabulary learning, also referred to as explicit, intentional, active learning, or direct instruction, involves a focused and conscious effort to acquire new words. Nation uses the term "decontextualized vocabulary learning," contrasting it with "learning from context." Advocates of this paradigm, such as Coady and Nation, acknowledge that context is a primary source for vocabulary acquisition but argue that learners need support to build sufficient vocabulary and develop strategies for handling context, especially at lower proficiency levels. While extensive reading might suffice for advanced students, it needs to be supplemented with deliberate learning for those at intermediate or lower proficiency levels.
Kennedy supports this notion, suggesting that deliberate learning is more appropriate for students up to an intermediate level, whereas incidental learning, which can occur outside the classroom, is more valuable for higher proficiency students. Given limited classroom time, deliberate teaching of vocabulary is often recommended, as only a few words or a small part of what is required to know a word can be taught at once. Ma and Kelly argue that learning a word demands more "deliberate mental effort" than merely engaging in meaning-focused activities. Although Schmitt demonstrates that deliberate vocabulary learning can be time-consuming and laborious, and Nation even claims it's "one of the least efficient ways" to improve vocabulary knowledge, both agree it's a vital component in teaching programs. Schmitt emphasizes that deliberate learning offers learners the "greatest chance" for acquiring vocabulary by directly focusing their attention on target words, aligning with the psychological principle that deeper processing leads to better retention.
Strategies for Deliberate Learning: Retrieval Practice and Spaced Repetition
Deliberate vocabulary learning benefits significantly from specific strategies like retrieval practice and spaced repetition. Retrieval practice requires learners to actively recall previously studied words rather than just reviewing them. Research in second-language vocabulary learning indicates that repeated retrieval can enhance long-term retention, though its effectiveness depends on factors such as the number of retrieval opportunities and the practice duration. Spacing, another technique, distributes learning or retrieval opportunities over time instead of concentrating them in a single session. Studies have shown that massed repetition alone is generally less effective than approaches that strengthen connections between word forms and meanings.
Combining spaced repetition with retrieval practice and semantic elaboration has been identified as a potentially effective approach for strengthening vocabulary learning. Word cards and digital flashcards provide practical formats for deliberate learning because they necessitate recalling a word's meaning or form before revealing the answer, distinguishing them from simple rereading. Research has also explored different retrieval formats and their effects on subsequent learning. It's crucial to understand that retrieval practice is not merely repetition; it demands active access to information from memory. Therefore, the effectiveness of deliberate vocabulary learning activities varies based on whether learners are asked to actively retrieve target words and how these retrieval opportunities are distributed over time. High-frequency words, and sometimes even low-frequency words, benefit from explicit teaching through methods like word cards, word part analysis, and dictionaries, as recommended by Nation. While deliberate learning might require more focused effort, it is often easier than incidental learning when measuring difficulty by results, and it is essential for reaching a threshold vocabulary size, serving as a prerequisite for incidental learning.
Incidental Vocabulary Learning: Learning from Context and Exposure
Incidental vocabulary learning, often referred to as implicit learning, occurs without a direct, conscious focus on acquiring new words. This type of learning happens naturally through exposure to language, such as during extensive reading or conversation. While deliberate learning provides a structured approach, incidental learning allows for a more organic expansion of vocabulary, particularly for higher proficiency students who can infer meanings from context. The two approaches are not in competition but rather mutually reinforcing, with each contributing to a comprehensive vocabulary acquisition program.
Educators have recognized the value of both deliberate and incidental methods, moving away from solely grammar-focused teaching to more communicative approaches. Incidental learning, while less structured, plays a significant role in developing fluency and expanding a learner's lexicon in a naturalistic way. The combination of explicit instruction and contextual exposure creates a robust framework for language learners to build and refine their vocabulary over time, ensuring both foundational knowledge and the ability to acquire words autonomously.
