Why Multitasking Is a Myth
Neuroscientists have consistently demonstrated that what we call multitasking is actually task switching. Your brain cannot process two cognitively demanding tasks simultaneously — it can only alternate between them. Each switch takes a fraction of a second, but those fractions add up dramatically over a day.
A landmark Stanford study found that heavy multitaskers were worse at filtering irrelevant information, slower at switching between tasks, and had poorer working memory than people who typically focused on one thing at a time. Paradoxically, the people who multitasked most were the worst at it.
The costs are not just cognitive. Multitasking increases cortisol (the stress hormone) and adrenaline, which over time leads to anxiety, fatigue, and brain fog. It also reduces the quality of your work — a study published in the Journal of Experimental Psychology found that multitasking reduces productivity by up to 40%.
How to Practice Monotasking
Monotasking requires two things: choosing one task and eliminating everything that competes for your attention. Before starting, decide on a single task and a time duration. Close all browser tabs except those needed for the task. Put your phone face down in a drawer. Close email and messaging apps.
Then work on that one task until the timer ends or the task is complete. If a thought about another task pops into your head — and it will — write it on a notepad and return to your current task immediately. This capture-and-return habit is essential because it lets you acknowledge the thought without following it.
Start with short monotasking sessions of 20 to 30 minutes if you are used to multitasking. Your brain will resist at first — the urge to check your phone or switch to something else can feel almost physical. That urge fades with practice. Gradually extend your sessions as your focus muscles strengthen.
Building a Monotasking Schedule
Monotasking works best when supported by a structured schedule. Use time blocking to create dedicated single-task sessions throughout your day. Each block is labeled with one task, and during that block, nothing else exists.
Group your monotasking blocks by cognitive demand. Place your most difficult single-task sessions during peak energy hours and save lower-demand tasks for the afternoon. Include short breaks between blocks to let your brain reset before shifting to a new task.
This approach sounds simple, but it is radically different from how most people work. Instead of having five browser tabs, three messaging apps, and an inbox open simultaneously, you have one task visible on your screen. The result is faster completion, fewer errors, and significantly less mental fatigue at the end of the day.