雅思阅读

📖 Reading Passage

The concept of 'cognitive load' refers to the total amount of mental effort being used in the working memory. In educational psychology, cognitive load theory suggests that learning is most effective when instructional materials are designed to minimize extraneous cognitive load, allowing learners to focus on the intrinsic load necessary for understanding the subject. For instance, when presenting complex diagrams, separating related text and visuals can reduce split-attention effects, thereby freeing mental resources for deeper processing. However, researchers caution that reducing cognitive load is not always beneficial; some desirable difficulties, such as interleaving practice, may increase load in the short term but enhance long-term retention and transfer. Thus, the optimal level of cognitive load depends on the learner's expertise and the nature of the task, making it a dynamic rather than static target in pedagogical design.