What does the term 'comprehensible input' refer to in language learning?

The term 'comprehensible input' refers specifically to the concept of language that learners can understand at their current level, often while still being exposed to language that is slightly above their proficiency level—a concept famously articulated by Stephen Krashen. This idea posits that learners best acquire language when they receive messages that they can mostly grasp but that also introduce new vocabulary or structures, encouraging their language development.

Thus, comprehensible input is vital for language acquisition because it allows learners to construct meaning based on context and prior knowledge while providing them with new linguistic features to challenge them and facilitate growth. This input supports the development of vocabulary, grammar, and overall language fluency in a natural and engaging manner.

In contrast, input that is too difficult for learners will likely lead to frustration and confusion, making it less effective for teaching. Input that excludes everyday language would not reflect the actual usage and needs of learners in real-life contexts. Additionally, while all forms of media can aid in language acquisition, not all media will provide comprehensible input; hence, the focus is on the clarity and understandability of language at the learner's level.