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 settings, instructional design aims to manage this load to optimize learning. According to Sweller's cognitive load theory, learning is hindered when the intrinsic load (complexity of the material) and extraneous load (how the material is presented) exceed the learner's capacity. However, by reducing extraneous load through well-structured materials, educators can free up cognitive resources for deeper processing. Recent studies have shown that incorporating multimedia elements, such as diagrams and animations, can reduce extraneous load only if they are tightly integrated with the text, otherwise they may become a source of distraction. Thus, the effectiveness of multimedia depends not merely on its presence but on its coherence with the learning objectives.