The Multitasking Myth: Why Only 2.5% of People Are “Supertaskers” Whose Brains Work Smarter, Not Harder
Only 2.5% of people can genuinely handle two cognitively demanding tasks at once without measurable performance loss, according to research from the University of Utah. For everyone else, what feels like productive juggling is something far less efficient. And the people most confident in their abilities tend to be the worst at it.
What Does the Research Actually Say About Multitasking Ability?
Roughly 97.5% of people experience measurable performance loss when attempting two cognitively demanding tasks simultaneously. In the 2010 study by Watson and Strayer published in Psychonomic Bulletin and Review, 200 participants were tested in a high-fidelity driving simulator while performing simultaneous cognitive tasks.
Non-supertaskers saw braking reaction times slow by 20%, following distances stretch by 30%, memory performance drop 11% and math accuracy fall 3%.
A follow-on neuroimaging study from the same team, also in Psychonomic Bulletin and Review, found that supertaskers show reduced prefrontal cortex activation during dual tasks. Their brains aren’t working harder — they’re wired more efficiently. It’s a rare neurological trait, not a skill that practice builds.
Are You a Supertasker or Just Used to Being Distracted?
Almost certainly not a supertasker — and if you’re confident you are, that confidence is itself a warning sign. A 2009 Stanford study by Ophir, Nass and Wagner, published in Proceedings of the National Academy of Sciences, found that people who self-identify as strong multitaskers consistently perform worse on multitasking tests than people who describe themselves as poor at it. Heavy media multitaskers showed the steepest declines on attention and task-switching assessments. Confidence ran in the opposite direction of competence.
What most people call multitasking isn’t multitasking at all. It’s rapid task-switching driven by notifications, open tabs and always-on communication tools. Genuine parallel processing is a fixed neurological trait. Habitual context-switching is a learned behavior — and learned behaviors can be unlearned.
How Much Productivity Does Multitasking Actually Cost?
Task-switching can reduce effective productivity by up to 40% on complex tasks, per the American Psychological Association’s review of the research. The losses come from switch costs, or measurable hits to time and accuracy every time the brain changes focus.
Those costs compound throughout the day. Gloria Mark at UC Irvine, whose field research is detailed in her 2023 book Attention Span, found it takes an average of 23 minutes and 15 seconds to fully regain focus after a single interruption.
Stack several pings, messages and quick email checks across a workday and sustained cognitive work gets squeezed into the margins. The drop isn’t just speed — accuracy declines too, which means task-switching often creates rework that wouldn’t have happened during sustained attention.
How Do You Stop Multitasking and Recover Your Focus?
The most effective fix is structural rather than motivational: protect a block of single-tasking time with notifications off and a hard stop. The goal is removing the option to switch, not relying on willpower to resist it.
A few practices that follow directly from the research:
- Close every tab and app not tied to the current task
- Silence all notifications for the full block, not just phone do-not-disturb
- Batch communication into two or three set windows rather than checking continuously
- Treat the 23-minute recovery cost as real — every quick interruption is a 23-minute interruption
The people who feel busiest are often the ones getting the least done. For 97.5% of us, the multitasking we’ve normalized isn’t a strength — it’s a leak that a single protected focus block can start to fix.
This article was created by content specialists using various tools, including AI.
