Frequent Filler Words May Signal Early Dementia Risk
Canadian researchers found that frequent use of filler words like "um" and speech hesitations may signal early cognitive decline and dementia risk, with AI analysis showing fluent speakers demonstrate better brain function.
Researchers have revealed that frequent use of filler words like "um" and "uh," along with speech hesitations, may indicate an early warning sign of dementia risk and should not be overlooked. On July 14, 2026, Canadian researchers presented a compelling study showing that using filler words frequently, including pauses during speech, could signal early-stage cognitive decline.
A research team from Baycrest Foundation, in collaboration with York University and University of Toronto, used artificial intelligence to analyze speech patterns in elderly individuals to assess brain health.
The study involved 76 participants aged 65-75 with normal cognitive function, who described images in their own words and completed executive function tests. AI then analyzed hundreds of speech characteristics and found that those who spoke fluently with fewer pauses generally demonstrated better brain function, even after accounting for age, gender, and education level.
Researchers identified four key factors the AI used in assessment: speech hesitations or pauses, use of filler words such as "um" and "uh," word-finding difficulties, and speech rhythm and continuity. All of these relate to the ability to control thoughts, working memory, and decision-making. If these abnormalities occur frequently, they may reflect declining brain function.
Dr. Jed Meltzer, senior scientist on the research team, stated: "Speech rhythm is not just a matter of communication style, but a highly sensitive indicator of brain health." He noted that analyzing speech patterns using AI could become a screening tool for dementia risk detection from the earliest stages, before symptoms become apparent. This would allow patients to receive care and treatment planning more quickly.
