Recent studies in cognitive neuroscience have revealed that the human brain's capacity for multitasking is far more limited than previously assumed. Contrary to popular belief, engaging in multiple tasks simultaneously does not enhance productivity but rather leads to a significant decline in overall efficiency. This phenomenon, known as 'task-switching cost,' arises because the brain must constantly reorient its attention and working memory when shifting between activities. Neuroimaging data indicate that the prefrontal cortex, which is responsible for executive control, becomes heavily taxed during such switches, resulting in slower response times and increased error rates. Furthermore, research suggests that chronic multitasking may impair long-term cognitive functions, such as sustained attention and deep information processing, potentially affecting academic and professional performance.
❓ 根据文章所述，多任务处理的主要后果是什么？
A. 它通过更好地利用大脑资源来提升整体效率。
B. 它会因大脑需要切换注意力而降低表现。
C. 长期来看，它对认知功能没有影响。
D. 它只影响响应时间，不影响错误率。
✅ 正确答案
It reduces performance due to the brain's need to switch attention.