Recent studies in cognitive neuroscience have revealed that the human brain's capacity for multitasking is severely limited. When individuals attempt to perform two tasks simultaneously that require high-level cognitive processing, the brain's prefrontal cortex switches rapidly between them rather than processing them in parallel. This switching incurs a 'switch cost,' manifesting as reduced accuracy and increased reaction time. Moreover, chronic multitasking has been associated with decreased working memory performance and heightened susceptibility to distraction. These findings challenge the popular assumption that multitasking enhances productivity, suggesting instead that it may impair overall efficiency and learning outcomes.
❓ 文中提到的研究得出的主要结论是什么？
A. 多任务处理通过激活多个大脑区域来提高认知效率。
B. 大脑能够同时处理多项复杂任务，且不会产生显著的成本消耗。
C. 多任务处理可能因切换成本而降低生产力并损害认知功能。
D. 长期多任务处理对记忆力或注意力没有可测量的影响。
✅ 正确答案
Multitasking may reduce productivity and impair cognitive functions due to switching costs.