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.
❓ According to the passage, what is the main consequence of multitasking?
A. It improves overall efficiency by using brain resources better.
B. It reduces performance due to the brain's need to switch attention.
C. It has no effect on cognitive functions in the long term.
D. It only affects response times, not error rates.
✅ Correct Answer
B. It reduces performance due to the brain's need to switch attention.
