Smart people do a lot of things that look stupid from the outside. One of the most well-documented ones involves a habit you've probably been told to knock off since childhood — and if you've spent any time feeling even slightly embarrassed about it, a growing body of peer-reviewed research would like to offer some belated vindication.
Talking to Yourself Out Loud
The cultural assumption is that people who talk to themselves are, at best, a little unhinged. Science disagrees.
A 2012 study by Gary Lupyan and Daniel Swingley, published in the Quarterly Journal of Experimental Psychology, had participants search for a specific object among a group of images. Some were told to repeat the object's name out loud while they searched. Others stayed silent. The group that spoke found their target significantly faster. Lupyan and Swingley called this the label feedback hypothesis: verbal labels don't just describe the world, they actively change how we perceive it.
When you vocalize a word, two systems fire at once — language production and auditory processing — and that combination actively sharpens how the brain tracks what it's looking for. A 2023 review in Frontiers in Psychology found self-talk woven through a surprisingly wide range of mental functions, from working memory and task-switching to self-regulation and higher-order cognitive management.
What comes off as eccentric is, neurologically speaking, efficient. People who do it naturally may have stumbled onto one of the more reliable ways to keep their thinking sharp without ever knowing that's what they were doing.