Scientists Say We've Been Wrong About Multitasking, How to Actually Work Smarter

If you have ever been told that multitasking is a myth and your brain can only switch rapidly between jobs, new neuroscience suggests the story is more interesting than that. A study from Georgetown University, published June 4 in the Journal of Cognitive Neuroscience and reported by Inc., found that with enough deliberate practice the brain can physically rewire itself to run two demanding tasks at the same time. At Metaintro, we track the research that changes how you work, and this one reframes a productivity belief most offices treat as settled. The catch is that true parallel processing is earned, not assumed, and the way to actually work smarter is to build deep skill before you try to combine tasks.

What Did the Georgetown Study Actually Find?

The research was led by senior author Maximilian Riesenhuber, a professor of neuroscience at the Georgetown University School of Medicine, with first author Patrick Cox, now an assistant professor of psychology at Lehigh University. The team published its findings, titled "Extensive Experience Remodels Neural Task Circuitry to Escape the Frontal Bottleneck and Increase Automaticity of Categorization," in the Journal of Cognitive Neuroscience. Coverage from Neuroscience News, Medical Xpress, and a Georgetown release distributed through EurekAlert laid out the core result clearly.

Participants trained on an image-sorting task using a mobile app, sorting morphed car images into categories and completing more than 30,000 trials over roughly five to ten weeks. Before and after that training, researchers scanned their brains using both functional MRI and EEG, which let them track not just whether performance improved but where in the brain the activity was happening. The key discovery was a shift in location. Early on, the task lived in the prefrontal cortex, the region responsible for conscious executive control. After extensive practice, the same task migrated to the temporal cortex, an area tied to object recognition and memory. That migration is the whole story, because it is what physically frees the executive region to take on something new.

Why does that matter? Because the prefrontal cortex is a bottleneck. It can really only manage one effortful task at a time, which is why untrained multitasking fails. Once a skill becomes automatic and moves to the temporal cortex, it frees the prefrontal region to handle something else, so two things really can run in parallel. The researchers described this as the brain escaping the frontal bottleneck, the same phrase that anchors the paper's title, a framing echoed in science coverage from News Medical.

The remodeling was not a quick fix. It showed up only after sustained, deliberate repetition, and the brain scans captured a genuine structural change rather than a temporary boost. That distinction matters for anyone hoping to shortcut the process. There is no app or trick that grants instant parallel processing. The capacity is built the slow way, through volume of practice, and the scans are what separate this study from the long line of productivity advice that simply asserts focus is good.

Have We Really Been Wrong About Multitasking?

For years the dominant view held that humans never truly multitask. Instead, the theory went, we switch attention back and forth so quickly it only feels simultaneous, paying a small cost in speed and accuracy each time we toggle. That picture is not wrong for most everyday situations. The Georgetown work refines it rather than tossing it out.

The nuance is that the rapid-switching model describes what happens before a task is automatic. The new finding is that sufficient experience can remodel the underlying neural circuitry so a learned task no longer needs constant executive oversight. As Riesenhuber put it, "Experience remodels the brain to bypass that frontal bottleneck." In other words, the bottleneck is real, but it is not permanent for skills you have drilled deeply enough.

This fits a broader pattern in how people master complex work. The prefrontal cortex learns a task, packages it, and hands it off to regions that can run it on autopilot. That handoff is what lets a seasoned driver hold a conversation while steering a familiar route, or a fluent typist think about wording instead of keystrokes. The skill is so embedded it no longer competes for the same scarce attention.

It is worth noting that other recent work still emphasizes the limits. A separate 2025 study from researchers at Martin Luther University Halle-Wittenberg, the Medical School Hamburg, and the FernUniversitat in Hagen, published in the Quarterly Journal of Experimental Psychology, ran dual-task experiments over multiple days and found that even practiced participants slowed down and made more errors when the tasks changed slightly. Lead author Torsten Schubert noted that the brain is very good at sequencing processes so they stop interfering with each other. As NBC News summarized the broader body of work, people can become capable of multitasking, but it takes patience and practice rather than willpower in the moment. Read together, the two studies tell a consistent story. The brain can automate and offload a specific, heavily drilled task, but it stays fragile the moment conditions shift or the task is unfamiliar. Automaticity is narrow, and it does not transfer freely to new situations.

Which Tasks Can You Actually Combine?

This is the practical heart of the research, and it comes with a sharp warning. Not every pair of tasks can be merged. Cox offered a memorable line on where the limits sit. "We can walk and chew gum at the same time, but looking at our phones to text while driving will never be safe, because we take our eyes away from the road," he said. The deciding factor is whether two tasks can run on fully separate, automated neural circuits without fighting over the same input.

Texting and driving both demand your eyes and overlapping attention, so they can never become compatible no matter how much you practice. Walking and talking use different systems, so they coexist easily. The lesson for your workday is to stop combining tasks that pull on the same resource, reading and writing at once, listening on a call while drafting an email, or scanning a document while someone explains a different problem.

A useful way to audit your own habits is to ask what each task needs. If two tasks both require active language processing or both require your visual focus on different things, they will collide. We explored a related angle in our look at the distraction economy and its toll on focus, where competing inputs quietly drain output. Pairing a truly automatic task with an effortful one is the only combination the brain handles well.

Think about the difference in concrete terms. A barista can take an order while steaming milk because the milk routine is fully automatic after thousands of reps, freeing attention for the conversation. A new hire cannot, because both tasks still demand conscious control and crash into the same bottleneck. The same logic governs a desk job. Listening on a video call while answering an unrelated message feels productive, but both pull on language and working memory, so quality drops on at least one. The research gives you a clean test. If you cannot do one of the two tasks without thinking, you cannot safely run it alongside anything else.

What Does This Mean for Your Career?

The takeaway is not that you should try harder to multitask. It is that depth of skill is what unlocks the ability to do more at once, and that depth takes real repetition. The participants in the study needed tens of thousands of trials before their brains reorganized. That is a strong argument for building genuine mastery in the core skills of your role rather than spreading attention thin across a dozen half-learned ones.

For most knowledge workers, the immediate win is the opposite of multitasking. Until a skill is automatic, batching and single-tasking will beat splitting your focus every time. We covered the evidence for structured recovery in our piece on science-backed break strategies, and the case for protecting deep focus in our breakdown of habits that boost professional performance. Both point the same direction, which is to do one hard thing well before reaching for the next.

This also reframes how you should think about productivity tools and the constant pressure to do more. Many workers respond to a heavier load by trying to layer tasks on top of each other, answering messages during meetings, drafting one document while reviewing another. The Georgetown findings suggest that strategy fights your biology unless the underlying tasks are genuinely automatic. The more honest move is to identify which parts of your job you have truly mastered and which still demand your full mind, then protect the second group ruthlessly. Mastery, not hustle, is what creates real bandwidth.

There is also a longer game here. Automating your foundational skills does not just let you combine tasks, it frees mental room to learn new ones. When a routine part of your job runs on autopilot, your prefrontal cortex has spare capacity to absorb the next capability your field demands. The study authors highlighted exactly this point, noting that moving a learned skill into the temporal cortex could let the brain use that old information as a building block for learning something new. In a market where the skills that keep you employable keep shifting, as we discussed in our guide to staying employable through constant change, that spare capacity is a real advantage. The people who keep advancing tend to be the ones who automate yesterday's hard skill so they can spend their attention on tomorrow's.

How Should You Apply This Tomorrow?

Start by separating your work into tasks that are genuinely automatic for you and tasks that still demand full concentration. The automatic ones, the things you could do half-asleep, are the only ones safe to pair with something else. Everything else deserves a single, protected block of attention.

Next, be honest about the false multitasking that fills most workdays. Flipping between a report and a chat thread is not parallel processing, it is costly switching that the older research already documented well. If a task is not yet automatic, the fastest route to doing it alongside others is to practice it on its own until it is. Heavy digital overload can even dull the cognitive sharpness you rely on, a risk we examined in our coverage of how short bursts of AI use affect the brain. Constant context-switching also feeds the kind of low-grade exhaustion that quietly builds over a workday, which we unpacked in our look at an AI burnout brain study.

It also helps to design your environment around this reality. Group similar tasks so your brain stays in one mode rather than thrashing between unrelated demands. Protect a daily window for the work that still requires full concentration, and push automatic chores like routine email or status updates into separate, lower-stakes blocks. The goal is to stop asking your prefrontal cortex to do two effortful things at once, because the research is now clear that it simply cannot, no matter how capable you feel in the moment.

Finally, invest your repetitions where they compound. Pick the two or three skills most central to your job and drill them until they feel effortless. That is how you escape your own frontal bottleneck, and it is a far more reliable path to working smarter than trying to juggle everything at once. The workers who get the most done are rarely the ones doing the most things simultaneously. They are the ones who have practiced their core work into automaticity, then guard their remaining attention for whatever genuinely needs it.

People Also Asked

Q: Is multitasking actually possible according to new research?

A: Yes, but with a major condition. The Georgetown study published in the Journal of Cognitive Neuroscience found that after extensive practice the brain can move a task from the prefrontal cortex to the temporal cortex, letting two tasks run in parallel. The catch is that this only works once a skill is fully automatic, which can take tens of thousands of repetitions, so most everyday multitasking still fails.

Q: Why does multitasking hurt productivity for most people?

A: Because untrained tasks compete for the prefrontal cortex, which can only handle one effortful job at a time. Switching between them adds a cost in speed and accuracy on every toggle. Until a task becomes automatic and offloads to another brain region, single-tasking and batching produce better, faster work than splitting your attention.

Q: How do I work smarter based on this study?

A: Sort your work into automatic tasks and effortful ones, then only pair an automatic task with a demanding one. Protect single-task focus blocks for anything that still requires conscious thought, group similar tasks together, and invest heavy repetition in your two or three core skills until they feel effortless and free up mental space.

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