Recent studies in cognitive psychology have challenged the traditional view that multitasking enhances productivity. Researchers have found that the human brain is not designed to process multiple complex tasks simultaneously; instead, it rapidly switches attention between tasks, leading to a phenomenon known as 'attention residue.' This residue impairs performance on subsequent tasks because mental resources remain partially engaged with the previous activity. Furthermore, neuroimaging data reveal that heavy multitaskers show reduced activity in brain regions associated with sustained attention and working memory, compared to light multitaskers. These findings suggest that while multitasking may feel efficient, it often results in slower completion times and more errors, particularly for tasks requiring deep concentration.
❓ 本文によると、マルチタスクが非効率的である主な理由は何ですか？
A. A. 脳は一度に複数のタスクを処理することができず、集中力を乱す精神的残留物を残す。
B. B. マルチタスクは脳のすべての領域の活動を低下させ、全体的な認知機能の低下を引き起こす。
C. C. ヘビーマルチタスカーは、ライトマルチタスカーよりも作業記憶容量が少ない。
D. D. 深い集中を要するタスクは、マルチタスクを行う際には完了させることが不可能である。
✅ 正确答案
A. The brain cannot handle multiple tasks at once and leaves mental residue that disrupts focus.
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