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.
❓ What is the main conclusion drawn from the studies mentioned in the passage?
A. Multitasking improves cognitive efficiency by engaging multiple brain regions.
B. The brain can process multiple complex tasks simultaneously without significant cost.
C. Multitasking may reduce productivity and impair cognitive functions due to switching costs.
D. Chronic multitasking has no measurable effect on memory or attention.
✅ 正确答案
Multitasking may reduce productivity and impair cognitive functions due to switching costs.
IELTS Reading Tips
Skim the questions first, underline keywords, then locate in the passage
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