Why Multitasking Doesn't Work: A Look at the Science

Rarely is a task performed as efficiently when attention is divided between it and another activity, yet multitasking continues to be celebrated as a valuable professional skill. Cognitive science, however, tells a rather different story: these cognitive limits are not a personal failing, but simply how human attention works.

Contrary to popular belief, the human brain does not process two demanding tasks simultaneously; instead, attention is rapidly switched back and forth between them, a process researchers term “task-switching.” Having been measured repeatedly in controlled laboratory settings, this switching cost has been found to slow down performance and increase the likelihood of errors, even among people who consider themselves skilled multitaskers.

Not only is productivity reduced by constant task-switching, but the quality of the work produced is also frequently compromised. Employees who are interrupted mid-task, for instance, often take significantly longer to complete that task once interrupted, since valuable time is spent reorienting to where they had left off. Seldom do those affected even notice this cost themselves, having grown so accustomed to switching between emails, messages, and reports throughout the day.

Particularly vulnerable to this effect are tasks requiring deep concentration, such as writing or complex problem-solving. Broken repeatedly by notifications and unrelated interruptions, this kind of focused work rarely reaches the depth it would otherwise achieve. Some researchers argue that true multitasking, in the sense of genuinely parallel processing, may not exist at all — what is commonly labelled multitasking is, more accurately, a rapid and costly sequence of single tasks.

What this research ultimately suggests is not that ambition should be abandoned, but that fewer, more focused tasks, tackled one at a time, are likely to be completed both faster and to a considerably higher standard.

Grammar Structure (Phân tích ngữ pháp)

• Inversion: Ví dụ trong bài: “Not only is productivity reduced by constant task-switching, but the quality of the work produced is also frequently compromised”.
• Complex Passive: Ví dụ: “this switching cost has been found to slow down performance and increase the likelihood of errors”.
• Participle Clause: Ví dụ: “Having been measured repeatedly in controlled laboratory settings, this switching cost has been found…”.