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.
❓ この文章によると、マルチタスクの主な結果は何ですか？
A. 脳のリソースをより有効に活用することで、全体的な効率が向上します。
B. 脳が注意を切り替える必要があるため、パフォーマンスが低下します。
C. 長期的には認知機能に影響を及ぼすことはありません。
D. 時間にのみ影響し、エラー率には影響しません。
✅ 正确答案
It reduces performance due to the brain's need to switch attention.
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