Recent studies in cognitive psychology have challenged the traditional view that multitasking enhances productivity. Researchers found that when individuals attempt to perform two tasks simultaneously, their brains rapidly switch attention between tasks rather than processing them in parallel. This switching incurs a cognitive cost, often referred to as 'task-switching penalty,' which reduces overall efficiency and increases error rates. Moreover, habitual multitaskers tend to perform worse on tests of sustained attention compared to those who focus on one task at a time. These findings suggest that the human brain is not optimized for concurrent processing, and that what is often perceived as multitasking is actually rapid sequential attention shifts. Consequently, in academic and professional settings, prioritizing single-tasking may lead to higher quality outcomes and better time management.
❓ 本文によると、マルチタスクが効率を低下させる主な理由は何ですか?
A. A. 脳は複数のタスクを同時に処理するため、過負荷につながる。
B. B. 脳は注意を急速に切り替え、認知的コストを伴う。
C. C. マルチタスカーには持続的な注意に必要なスキルが欠けている。
D. D. 学術環境はマルチタスクを奨励せず、ストレスを引き起こす。
✅ 正确答案
B. The brain switches attention rapidly, incurring a cognitive penalty.
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