With whom is the comprehensible input hypothesis associated?

The comprehensible input hypothesis is associated with Stephen Krashen, a linguist and educational researcher renowned for his work in second language acquisition. Krashen proposed that language learners acquire a new language most effectively when they are exposed to input that is slightly beyond their current proficiency level, often referred to as "i+1." This concept emphasizes that language acquisition occurs when learners understand the message conveyed, even if they do not grasp every single word. Krashen's theory supports the idea that meaningful communication and language exposure are crucial for effective learning, shifting the focus from rote memorization and formal instruction to more natural learning experiences. This understanding has significantly influenced modern approaches to language teaching, highlighting the importance of context, engagement, and authenticity in learning environments.