Recent studies in cognitive neuroscience have revealed that the human brain's capacity for multitasking is severely limited. When individuals attempt to perform two tasks simultaneously that require high-level cognitive processing, the brain's prefrontal cortex switches rapidly between them rather than processing them in parallel. This switching incurs a 'switch cost,' manifesting as reduced accuracy and increased reaction time. Moreover, chronic multitasking has been associated with decreased working memory performance and heightened susceptibility to distraction. These findings challenge the popular assumption that multitasking enhances productivity, suggesting instead that it may impair overall efficiency and learning outcomes.
❓ この文章で言及されている研究から導き出される主な結論は何ですか？
A. マルチタスクは、複数の脳領域を活性化させることで認知効率を向上させます。
B. 脳は、複雑な複数のタスクを同時に処理しても、大きなコストをかけることなく行うことができます。
C. マルチタスクは、切り替えコストにより生産性を低下させ、認知機能を損なう可能性があります。
D. 慢性的マルチタスクは、記憶や注意力に測定可能な影響を及ぼさない。
✅ 正确答案
Multitasking may reduce productivity and impair cognitive functions due to switching costs.
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