"Why do they keep making the same mistake?" the answer is not what you think

Have you ever explained something clearly, yet students continue making the same mistake? Or why do they confidently say, “I understand,” but still use the wrong form in practice? This situation can be frustrating. The issue, however, may not be intelligence or effort. It may be a lack of noticing. In 1990, Richard Schmidt introduced the Noticing Hypothesis in second-language learning. His central idea was simple but powerful. Learners cannot truly acquire a language feature unless they consciously notice it. Hearing correct grammar is not enough. Reading a rule is not enough. Even repeated practice may not lead to improvement if learners do not recognise the gap between their performance and the correct model. This concept is especially important for adult learners. Unlike children, adults usually require focused attention and deliberate effort to improve. Teachers may apply different methods, such as explaining grammar rules, encouraging communication in the target language, or emphasising listening and speaking practice. These approaches are useful; however, they become far more effective when students clearly see their own recurring errors.