Science Says Your Attention Span Isn't Broken. Your Environment Is.

47 seconds. That's how long the average office worker stays on one screen before switching, per Gloria Mark's research at UC Irvine. In the mid-2000s it was two and a half minutes.

So the attention span is dying, right? Wrong. That's the surprise in David Adam's piece for Nature, republished by Scientific American in May 2026. A 2024 meta-analysis covering more than 21,000 people across 32 countries, tested between 1990 and 2021, found no decline in the brain's underlying capacity to concentrate. Adult scores actually improved slightly.

Here's the distinction that matters. Capacity is what your brain can do in a controlled setting. Behavior is what you actually do at your desk with six tabs open and a phone face-up next to the keyboard. Capacity held steady. Behavior fell apart. And Mark's data shows the cost: more errors, slower completion, higher stress. One more finding worth taping to your monitor: people are about as likely to self-interrupt as they are to be interrupted. Half the problem walks in the door with you.

The fix follows from the diagnosis. Researcher Monica Rosenberg puts it plainly: changing your environment beats trying to change yourself. Put the phone in another room during your 90-minute blocks. In some studies, people performed worse with a silent phone in their pocket. Close the inbox tab instead of minimizing it. Raise the stakes of the task in front of you by tracking one number that tells you it mattered.

Your focus isn't gone. It's waiting for you to clear the junk out of the room.

Originally published by David Adam at Nature, via Scientific American. Read the full piece here: https://www.scientificamerican.com/article/are-attention-spans-really-shrinking-what-the-science-says/