You've probably heard that the human attention span is eight seconds, shorter than a goldfish's. It isn't. That figure has no good source. How long people can focus depends almost entirely on the task and the setting: minutes on a dull monitoring job, hours on something absorbing. What research does show is that sustained effort declines over time, and that on screens we switch far more often than we used to.
The goldfish myth
The eight-second claim spread in 2015, when a Microsoft Canada marketing report quoted it. The number traced back to a website of statistics that didn't cite any research, and journalists who went looking, including the BBC's statistics programme More or Less, found no study behind it. Goldfish, for the record, can remember things for months. There's no fixed “attention span” to measure in seconds, because attention isn't one thing.
What research actually shows
Focus fades on monotonous tasks
In the 1940s, the psychologist Norman Mackworth asked RAF radar operators to watch a clock-like pointer for an unusual double jump. Detection fell off noticeably within the first half hour. This “vigilance decrement” is one of the sturdiest findings in attention research: on boring, repetitive tasks, accuracy slides with time.
We switch more on screens
Gloria Mark has measured how long people look at one screen before switching to another. In her studies the average fell from about two and a half minutes in 2004 to around 75 seconds a few years later, and to about 47 seconds in more recent work. That's not a limit on ability: it's a habit, shaped by notifications and tabs, and it can be changed.
The “10-minute lecture” is shaky too
Teachers are often told students lose focus after 10 to 15 minutes. Reviews of the evidence, such as Karen Wilson and James Korn's in 2007, found that claim poorly supported; attention in lectures varies more with the lecturer and the material than with the clock.
Hard thinking has a daily ceiling
Studies of expert performers, like Anders Ericsson's work with violinists, found that even the best rarely sustained more than about four hours of deliberate practice a day, in sessions of up to about 90 minutes.
So how long can you focus?
| Kind of work | A realistic session |
|---|---|
| Something you're dreading | 10–25 minutes to get going |
| Email, admin, routine tasks | 25–30 minutes, then switch |
| Writing, study, analysis | 45–60 minutes |
| Deep, absorbing problems | 60–90 minutes |
| A whole day | About 3–4 hours of real focus |
These are starting points. Find your own by setting a timer and noticing when you start rereading, reaching for your phone or yawning. Then set sessions just under that, and lengthen them slowly.
How to focus for longer
- Remove the switches. Fewer tabs, no notifications, phone elsewhere: most of the 47 seconds is habit.
- Use a timer. The Pomodoro timer to start, the deep work timer to stretch.
- Take real breaks, away from screens. Our guide to breaks that work explains why.
- Sleep. Attention is one of the first things to go after a short night.
Focus with an end in sight
Long sessions feel easier when you can see how much is left. In Flight, your session is a real flight with a plane crossing the map, and it lands when your time is up.