How Multitasking Reduces Focus During Study Sessions

Oxyzen Institute October 04, 2026

You Feel Busy at Your Desk, but Your Brain Barely Took Anything In

It is 8 p.m. You have your notes open, a lecture video playing, a group chat running, and a music tab in the background. Your phone sits next to your keyboard, lighting up every few minutes.

You feel busy. You feel productive.

Then you close the laptop and realize you cannot explain what you just studied. Two hours at the desk, maybe thirty minutes of real learning. That gap between effort and results is exhausting.

Why the Wrong Beliefs Keep You Stuck

  • "I'm just good at multitasking." Research reviews suggest students often misjudge how much it hurts their results.
  • "Switching is free." Every jump to a new task asks your mind to restart.
  • "More hours will fix it." Extra hours spent switching often just add more of the same.
  • "Everyone does it." Common does not mean effective.
  • "It's a willpower problem." Many times it is a setup problem, like open tabs and a phone within reach.

What It Quietly Does to Your Confidence

  • You re-read pages and still feel lost, so you start doubting your memory.
  • You study longer than your friends but score lower, which feels unfair.
  • You feel guilty after every phone check, and the guilt adds stress.
  • You rush before exams because your daytime hours disappeared.
  • You start to think you are "not smart enough," when the real issue is split attention.

What Multitasking Really Is (Hint: It Is Mostly Rapid Switching)

Here is the surprising part. When you "multitask" while studying, your mind is rarely doing two things at once. It is jumping back and forth between them, very quickly.

Think of a chef who keeps leaving the stove to answer the door. Each trip may only take a few seconds, but the sauce still burns.

What it feels likeWhat is often happening
"I'm doing two things at once."Your attention is jumping back and forth.
"I'm saving time."Each jump costs a little focus, and the costs add up.
"I can still follow along."You catch pieces but miss how the ideas connect.

Here is another way to picture it. Reading with a video playing is like trying to listen to two radio stations at once. You hear bits of both, and you understand neither well.

What Research Says About Studying With Many Things Open

Researchers have studied this for years, mostly with college students. One review of media multitasking and academic performance found that it interferes with attention and working memory.

The studies in that review link it to lower GPA, weaker test scores, poorer recall, and worse reading comprehension. They also link it to lower-quality note-taking.

A Number Worth Remembering

In one study covered by that review, 441 college students reported what they used while preparing for an exam. Students who used 0 to 2 digital technologies scored significantly better than students who used 7 or more.

This was an observational study, so it shows a link, not proof of cause. Still, the pattern fits what many students feel at their own desks.

Why You Might Not Notice the Damage

The same review notes that students tend to underestimate how much multitasking hurts them. It also says students often cover for the lost focus by re-reading or redoing work.

In plain words, you may pay for multitasking with extra time instead of lower scores. That is why a "short" study session can quietly turn into a long one.

Another team tested 130 college students on a timed reading test, with and without a video playing alongside. They concluded that cognitive load, meaning how much your brain is juggling, plays a big role in how much you remember.

Myth vs. Reality

Myth: "All multitasking is equally bad."

Reality: The picture is more mixed than headlines suggest. One study of online learners found that study-related device use, like taking notes or checking course materials, was linked with better self-regulation and academic performance.

The authors argue that the effect depends on the purpose behind the media use, not on multitasking alone. Messaging a friend and opening your lecture slides are very different moves.

Another study found that media multitasking explained only a limited share of differences in students' verbal processing. So other factors matter too, such as sleep, stress, and study habits.

Myth: "Only weak students get distracted."

Reality: A survey study of 135 US high school students cites a Common Sense Media report saying about half of teens often or sometimes use social media while doing homework. This is common, and it says nothing about intelligence.

Three Experiments to Try in Your Next Study Session

Instead of promising to "stop multitasking forever," run small tests. Treat each one like a science project on your own brain.

1. Write a One-Line Mission

Before you open a single tab, finish this sentence on paper: "For the next 25 minutes, I am only doing ______."

Maybe it is "reading Chapter 4" or "solving ten algebra problems." A clear mission gives your brain a reason to say no to everything else.

2. Close the Side Doors

Distractions are easier to avoid when they are not one click away. Before you start, do three quick things:

  • Close every tab you do not need for this task.
  • Silence notifications on your laptop and phone.
  • Move your phone out of arm's reach.

If you need your laptop for notes, keep only the notes and the material open. This follows the idea from the study above: device use that serves the task is a different animal from device use that pulls you away.

3. Run a Ten-Minute Face-Off

Here is a way to see the effect for yourself. Pick two short reading passages of similar length.

Read the first with your phone beside you and a chat window open. Read the second with the phone in another room and only the passage on screen. After each one, write down three things you remember without looking back.

Pro Tip: Do not judge the result after just one try. Repeat the face-off on two or three days, and see which way the numbers lean.

This is not a lab experiment, and your results may differ from the studies above. But it gives you something better than a general rule: proof from your own life.

The Hidden Time Tax You Pay Every Time You Jump Between Tasks

In Part 1, we saw that "multitasking" is mostly rapid switching. Now let's look at what each switch costs, and how to keep that cost low.

Psychologists measure this with task-switching experiments. The American Psychological Association's summary of switching costs explains that people lose time when they switch, and the loss grows when the tasks are complex or unfamiliar.

Researcher David Meyer has said that even brief mental blocks from shifting tasks can cost as much as 40 percent of someone's productive time. That is an upper estimate, not a promise about your next study session. But it shows why small switches matter.

Think of stop-and-go traffic. Each stop only lasts a few seconds, yet the trip takes far longer than it would on an open road.

Group the Small Stuff Into One Window

Picture a student named Priya. She answers texts, checks her class portal, and reads emails whenever they pop up during study time.

Each check takes a minute. But her mind needs time to get back into the chemistry problem each time.

Now she tries a new rule. She keeps a "quick list" and handles all small chores in one 10-minute window after each study block. If you like planning your day in blocks, our guide on time boxing versus time blocking shows how to give each kind of work its own slot.

Keep Your Mental Desk Clear

Your working memory is like a small desk. It can only hold a few things at once.

When you study while chatting and watching a video, you pile extra items on that tiny desk. Your notes have to fight for space. If you want to understand this better, read about how working memory affects studying.

Try this: before a study block, jot down everything that is on your mind. Getting it onto paper clears space on the desk.

Leave a Breadcrumb Before Every Switch

Sometimes you have to stop. A class starts, a family member calls, or dinner is ready.

Before you leave, write one line: "Stopped at question 7. Next step: check the formula." That tiny note makes it much easier to restart without re-reading everything.

Think of it as a trail of breadcrumbs back to where you were.

Treat Sound as Part of Your Setup

Background music, podcasts, and videos are also a form of doubling up. For some people they help. For others they pull attention away from reading.

Don't guess. Use the ten-minute face-off from Part 1, once with sound and once without, and compare what you remember. Our post on using background music to improve study concentration can help you set up the test.

Make the Habit Last

Good habits fade without a little upkeep. These small routines keep your progress steady:

  • Do a weekly check. Ask yourself where you switched most this week, and why.
  • Keep one study-only spot. Your brain learns that this desk means one task.
  • Count clean blocks, not hours. A "clean block" is a study stretch with no switching.
  • Handle the phone first. If it keeps winning, try the ideas in how to avoid phone distractions while studying.

Progress here looks small each day. After a few weeks, it adds up to more learning in less time.

Mistakes That Quietly Bring Multitasking Back

Most students who try to study with one task at a time slip into the same few traps. Here are the biggest ones.

Multitasking in Disguise

You put your phone away, but then you "just check it" every five minutes. That is still switching, only slower.

Save checks for your planned break. A scheduled check is a break. An unplanned check is a switch.

Going Cold Turkey

Some students promise to go a full day with no phone and no music. By afternoon, they break the rule and feel like failures.

Start with one clean block. Then add another. Small wins are easier to repeat.

Treating Every Tool as an Enemy

Your laptop is not the problem. Using it for notes or course material is very different from using it to scroll.

Remember the finding from Part 1: the purpose behind the device use matters. Ask yourself, "Is this open for the task, or is it pulling me away?"

Switching Because You Are Tired or Bored

Often the urge to jump to something else is a signal. Your brain may be tired, or the task may feel too big.

Take a short break instead of grabbing your phone. If the task feels huge, break it into a small first step and begin there.

Measuring Hours Instead of Results

Four hours at a desk sounds impressive. But if half of that time was spent switching, your results will show it.

Check what you learned, not how long you sat. Quiz yourself after each block, and let the answers guide your next session.

What Happens If You Skip These Fixes

Study time stretches out while understanding stays thin. You may feel more tired by exams, since you spent long hours without clear progress.

That can wear down your confidence, which makes you more likely to reach for distractions next time. The good news is that every one of these traps has a simple fix.

Do's and Don'ts at a Glance

Do:

  • Batch small chores into one window.
  • Write a breadcrumb note before you stop.
  • Test your own music and phone rules.

Don't:

  • Promise a perfect day on day one.
  • Label every device as the enemy.
  • Judge your study time by the clock alone.

Quick Questions Students Ask

Can I ever multitask while studying?
Some pairings are fine when one task is automatic, like sorting your notes while a familiar playlist plays. For learning something new, one task at a time usually works better.

What if I get my best ideas while switching?
Write them on your parking-lot note and come back to them during your break. You keep the idea without losing your place.

What if I still cannot focus, even with one task?
Try shorter blocks and check your sleep and stress levels. If the trouble is constant or worrying, talk to a doctor or school counselor.

Your Single-Task Checklist: Keep It on Your Desk

You do not need a perfect setup. You need a simple routine you can repeat.

Print this list or copy it onto a sticky note:

  1. I wrote my one-line mission for this block.
  2. I wrote down what is on my mind.
  3. My phone is out of reach.
  4. Only the tabs I need are open.
  5. My quick list is ready for later.
  6. I left a breadcrumb note before stopping.
  7. I tested what I remembered after the block.

One clear task, done well, beats three tasks done halfway. Pick one item from this list today, try it, and see how your next study session feels.

Disclaimer: This article is for educational purposes only and is not medical or professional advice. If you have ongoing difficulty with focus, sleep, or stress, please speak with a qualified healthcare professional or a school counselor.

Sources

Author Name: Most. Sraboni Akter

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