Implicit vs. Explicit Learning: Unveiling the Two Sides of Knowledge Acquisition
Learning is a multifaceted process, and understanding how we acquire knowledge is crucial for effective teaching and personal development. Two fundamental approaches to learning are implicit and explicit learning. This article explores the definitions of each, their characteristics, examples, and how they interact to shape our understanding and skills.
Introduction to Implicit and Explicit Learning
Implicit and explicit learning represent two distinct ways in which we acquire knowledge and skills. The difference between implicit and explicit learning isn't that one is good and the other bad. Which kind of learning is best for the task at hand depends on what you want to do with the information! And sometimes, one kind of learning is better suited to particular kinds of information.
Defining Implicit Learning
Implicit learning describes learning that happens through experience, interaction, and practice. Implicit knowledge is generally described as knowledge acquired without conscious awareness of what has been learned. It is often learned incidentally while engaging in communicative activities, such as conversation or reading. Instead of focusing on memorization and the rules themselves, implicit learning is the result of using the rules to solve problems, learn from mistakes, and develop instincts for the new patterns or information. 💡Implicit learning often happens without even realizing it.
Ellis (2015) defines implicit learning as, “acquisition of knowledge… by a process which takes place naturally, simply and without conscious operations”.
Characteristics of Implicit Learning
- Unconscious Acquisition: Knowledge is acquired without conscious effort or awareness.
- Experience-Based: Learning occurs through direct experience, interaction, and practice.
- Intuitive Understanding: Development of instincts and intuitions for new patterns or information.
- Incidental Learning: Often occurs unintentionally while engaging in other activities.
Defining Explicit Learning
Explicit learning happens through direct instruction that tells the learner the rules, how something works, or what the pattern is. Explicit knowledge refers to the conscious awareness of language rules and structures. Learners gain explicit knowledge through direct instruction, studying grammar explanations, or engaging in metalinguistic discussions. Unlike implicit knowledge, explicit knowledge can be verbalized.
Read also: Understanding Implicit Bias Education Programs
Ellis (2015) defines explicit learning as “a more conscious operation where the individual makes and tests hypotheses in a search for structure”.
Characteristics of Explicit Learning
- Conscious Awareness: Knowledge is acquired through deliberate and focused attention.
- Direct Instruction: Learning occurs through explicit teaching, explanations, and rules.
- Verbalization: Knowledge can be articulated and explained.
- Structured Learning: Often occurs in formal educational settings.
Examples of Implicit and Explicit Learning
Whether you’ve heard of these terms or not, you've definitely done both kinds of learning!
Capital Cities
If you want to learn the capital city of every country in the world, you might explicitly memorize them-by creating flashcards, studying a map, or making a song to help remember them. But some of the capitals you might already know implicitly, from having learned them through experience-maybe you once read a book that took place in Paris (capital of France), backpacked through South America years ago and know Lima (capital of Peru) and Santiago (capital of Chile), or had a friend who moved to Manila (capital of the Philippines).
Greatest Hits of 2003
You could google "top 50 songs of 2003" and then explicitly learn them by memorizing them, studying the trends in pop music in the early 2000s, or learning one a day for 50 days. However, there are many among us who acquired knowledge of the 2003 chart-toppers implicitly, from hearing "Seven Nation Army" on the radio 100 times an hour back in '03, stealing their older sister's copy of Dangerously in Love, and remembering exactly where they were when they heard "In da Club" for the very first time.
Secret Talents
If you wanted to impress your peers with a juggling act, you could read about the physics of juggling, read step-by-step instructions, and otherwise try to learn explicitly… but to actually juggle it would probably be best to start learning implicitly as soon as possible! If you want to use your new juggling skill, knowing about juggling won't be as useful to you as being able to get a few objects into the air (even if they're not there for long!).
Read also: Implicit Learning: An In-Depth Look
Learning a Language
Imagine someone traveling in Québec, for example. They might pick up a few words or phrases they didn’t know before, such as Bonjour (French for Hello) or Comment ça va? (French for How are you?). They might not know what “Comment ça va?” means the first time they hear it, but they certainly would after the 10th time. Even with nobody translating it for them, nobody speaking in English, and nobody trying to explain it, the meaning would sink in, and they would learn implicitly.
On the other hand, if you are in a Portuguese class and the teacher points to something red and says, “vermelho“, this is explicit instruction.
Implicit Learning in Second Language Acquisition (SLA)
Implicit and explicit knowledge are two contrasting types of knowledge often discussed in the field of second language acquisition (SLA). Implicit knowledge refers to the unconscious, intuitive knowledge that learners develop through meaningful exposure and use of a language. In contrast, explicit knowledge involves conscious understanding of language rules, often acquired through formal instruction or study.
Early SLA researchers, such as Stephen Krashen, drew a strong distinction between conscious language learning and subconscious language acquisition. Krashen argued that conscious learning (akin to explicit knowledge) is less effective in developing true linguistic competence. Krashen's Input hypothesis posits that learners acquire language primarily through exposure to comprehensible input, leading to the development of an implicit linguistic system. Krashen claimed that the role of conscious learning is minor, mainly helping learners monitor their output rather than acquire new rules. This viewpoint has influenced debates around how much direct grammar instruction is beneficial.
Ellen Bialystok was also one of the first researchers to formally propose a distinction between implicit and explicit linguistic knowledge. Bialystok's distinction was motivated by practical concerns in SLA research, particularly the need to explain the differential success of learners in achieving fluent and accurate performance in a second language.
Read also: Understanding PLCs
Rod Ellis significantly advanced the study of implicit and explicit knowledge in SLA through a systematic psychometric approach aimed at operationalizing and validating these constructs. Ellis's principal component factor analysis revealed that scores from the imitation test, oral narrative test, and timed GJT loaded on one factor, interpreted as measuring implicit knowledge.
John Williams and Patrick Rebuschat further advanced the study of implicit and explicit knowledge by focusing on the role of awareness in language learning. Williams explored how implicit learning occurs in controlled experimental settings, often using artificial grammars to investigate whether learners acquire linguistic patterns without conscious awareness. His studies provided evidence that learners can implicitly acquire linguistic patterns even in the absence of explicit instruction. Rebuschat extended this line of inquiry by developing methods to measure awareness during learning tasks.
The Interface Problem: How Implicit and Explicit Knowledge Interact
The relationship between implicit and explicit knowledge is a subject of ongoing debate.
- The strong interface hypothesis posits that explicit knowledge can transform into implicit knowledge through extensive practice and proceduralization.
- The no interface hypothesis, closely associated with Krashen's distinction between learning and acquisition, argues that implicit and explicit knowledge are fundamentally distinct systems. According to this perspective, explicit knowledge cannot be transformed into implicit knowledge.
- The weak interface hypothesis suggests that explicit knowledge can aid the development of implicit knowledge under certain conditions, such as when learners consciously notice a gap between their interlanguage and target language norms.
However, recent findings highlight that the Interface Problem cannot be fully understood solely through the traditional question of whether explicit knowledge transforms into implicit knowledge. For instance, N. Ellis (2005) argues that conscious attention and explicit knowledge facilitate the development of pattern recognition abilities, which serve as a foundation for implicit learning. Additionally, Dienes and Perner (2001) and Williams (2005) suggest that learners' unconscious implicit knowledge can later trigger conscious noticing and the formation of explicit rules.
Implications for Pedagogy
The debate surrounding implicit and explicit knowledge has important implications for language pedagogy. Some researchers propose an integrated approach, balancing meaningful input-based instruction with carefully timed explicit feedback on form.
Balancing Implicit and Explicit Instruction
Given the complexity of teaching, it’s no surprise that there isn’t a one-size-fits-all answer in the implicit versus explicit learning debate. On one hand, a study conducted by researchers at Vanderbilt University found that many students fared better with explicit instruction, and many other researchers have found similar results. For you as a teacher, this means implicit and explicit instruction can work hand-in-hand.
Implicit Learning on Duolingo
Duolingo courses leverage implicit learning because we want our learners to be able to use the information they're studying. After all, if you're studying a language, you probably want to speak it or enjoy music or movies in the language. And you're probably not studying math to impress friends and colleagues at parties-you probably want to put it into practice out in the world!
That's why in our courses, learners interact with information right from the start, in their very first lesson. This hands-on experience recognizing the information-words, decimals, anything!-and having to produce it, too, gets learners to pay close attention, look for patterns, test out hypotheses, and start using the language. We also create exercises that visually draw learners' attention to the most relevant information, to help you notice and remember it. This approach also means learners make mistakes… and that's ok! Mistakes are part of the learning process: They are your brain testing the possible rules, and making a mistake heightens your attention to all the parts of the pattern so you can improve your hypothesis for next time.
But there's a place for explicit instruction, too. Implicit and explicit learning can work together effectively for many topics, especially if it's difficult to get enough exposure to or interaction with some kinds of information. Explicitly learning a rule or pattern can help move your learning along by directing you to the correct hypothesis-but remember that knowing the information won't be a replacement for learning to use it. That's why Duolingo courses give you extra, explicit information in section overviews, unit guidebooks, and right here on the blog-but putting it to use should be a priority!
Benefits and Drawbacks of Implicit vs. Explicit Instruction
The benefits and drawbacks of each approach can vary based on factors such as your students’ ages and existing knowledge.
Implicit Instruction
Benefits:
- Independent learning. Since implicit learning environments are less structured, students have more space to think creatively and independently about the subject matter.
- Efficiency. Implicit instruction can be more efficient because it’s less focused on achieving strict learning goals.
- Lifelong skills. Being able to take in knowledge and interpret it without direct instruction is a valuable lifelong skill.
Drawbacks:
- Falling through the cracks. One of the biggest shortcomings of implicit instruction is the potential for some students to fall behind due to a lack of direction.
- External motivation. When using an implicit approach, you might also encounter challenges with student motivation.
Explicit Instruction
Benefits:
- Clear learning progress. The clear outlines of explicit instruction can make it easier for you to track students’ progress.
- Student investment. You can closely monitor students’ progress via explicit instruction-and so can the students themselves.
- Ease of implementation. Due to its highly structured nature, explicit learning can be easier to implement in a classroom.
Drawbacks:
- Reduced self-direction. The rigid requirements of explicit teaching can demotivate more self-directed learners.
- Too much structure. Student frustration points to another potential problem with explicit instruction.
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