Why speaking a new language might actually be the wrong way to learn it
In short: Linguist Stephen Krashen argues that speaking is not the cause of language acquisition, but rather its byproduct. According to his influential input hypothesis, we learn by subconsciously absorbing comprehensible messages just slightly above our current level, rather than through conscious study, grammar drills, or forcing ourselves to speak prematurely.
Developed by Stephen Krashen in the 1970s and 1980s, the input hypothesis is the cornerstone of a broader framework known as the monitor model. It posits that linguistic competence grows only when learners engage with comprehensible input—language they understand that sits at their 'i+1' level, where 'i' is their current knowledge and '+1' is the next logical increment. Crucially, Krashen argues that conscious learning, such as memorizing grammar rules, cannot produce spontaneous speech; it only serves as a 'monitor' to check or correct output, a process that often slows down communication and requires significant time and focus.
The model relies on five interconnected hypotheses. The acquisition-learning hypothesis distinguishes between subconscious acquisition—the natural way we learn our native language—and conscious learning, which Krashen deems less effective. The natural order hypothesis suggests that language features are acquired in a fixed, predictable sequence regardless of how they are taught. Meanwhile, the affective filter hypothesis explains how negative emotions like fear, anxiety, or boredom act as a psychological barrier, effectively blocking the brain from processing input. To succeed, Krashen suggests lowering this filter by creating low-anxiety environments.
While highly influential in American education, the theory faces significant academic criticism. Skeptics argue that the hypotheses are difficult to test empirically and that the strict separation between acquisition and learning lacks definitive proof. Some researchers, such as Wolfgang Butzkamm and John A. W. Caldwell, have proposed refinements, suggesting that while comprehensible input is necessary, it is not sufficient on its own. They argue for 'dual comprehension,' where learners must understand both the meaning of a message and the literal anatomy of how it is constructed to fully internalize the language.
Ultimately, the theory challenges traditional classroom methods that prioritize output and explicit instruction. By advocating for a 'silent period' and focusing on meaning over form, Krashen’s work has inspired methodologies like the natural approach and TPR Storytelling. Despite ongoing debates about its limitations, the input hypothesis remains a fundamental pillar in modern discussions regarding how humans develop linguistic ability.
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Sources
- Summary by Intellect · source: Input hypothesis
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