While filler words can help conversations flow, research suggests overusing them may signal uncertainty or a shaky command of the material (or language in general). In professional settings—like work ...

“Filler words are part of your mental dictionary, even things like um or uh,” said Dr. Idan Blank, assistant professor of psychology and linguistics at the University of California, Los Angeles.

The tiniest quirks in our speech can change how we’re perceived. But, um, filler words aren’t the villains they’re made out to be. They’re, you know, working behind the scenes. “We group them all ...