Your ‘Ums’ and Pauses Could Reveal Early Dementia Risk, New Study Finds

Have you ever caught yourself saying “um” or “uh” more than usual during a conversation? Or maybe you pause for a moment while searching for the right word. According to new research, these everyday speech habits might offer important clues about your brain health.

A study from scientists at Baycrest, the University of Toronto, and York University has found that subtle speech characteristics—including pauses, filler words like “um” and “uh,” and difficulty retrieving words—are closely linked to executive function. Executive function is the group of mental skills that control memory, planning, attention, and flexible thinking.

These findings provide some of the strongest evidence so far that the way we naturally speak is connected to key cognitive abilities. The research also builds on earlier studies showing that older adults who speak more quickly tend to maintain stronger thinking skills over time.

What the Study Found About Speech and Brain Health

For this study, participants looked at detailed images and described them in their own words. They also completed standard tests that measure executive function. Researchers then used artificial intelligence to analyze the speech recordings in depth. The AI system detected hundreds of subtle speech features, including how long and how often people paused, how many filler words they used, and timing-related patterns in their speech.

These speech markers consistently predicted how well participants performed on cognitive tests. This was true even after researchers adjusted for factors such as age, sex, and education level. The findings suggest that speech patterns are not just a matter of personal style but may reflect underlying brain health.

“The message is clear: speech timing is more than just a matter of style, it’s a sensitive indicator of brain health,” said Dr. Jed Meltzer, Senior Scientist at Baycrest’s Rotman Research Institute and senior author of the study.

Why Executive Function Matters for Your Daily Life

Executive function is like the brain’s air traffic control system. It helps you plan your day, stay focused on tasks, switch between activities, and control impulses. When executive function starts to decline, everyday activities can become more challenging.

You might notice it when you have trouble following a recipe, managing your finances, or keeping track of conversations. These changes can affect your work, relationships, and overall quality of life. Executive function naturally weakens with age, but it is often affected during the early stages of dementia.

The Problem with Current Cognitive Testing

Standard cognitive tests can be difficult to repeat often. They take time, and people often improve simply because they become familiar with the test questions. This makes it hard for doctors to track changes in brain function over time.

Natural speech offers a simpler alternative. Because speaking is part of daily life, it can be measured repeatedly and without much effort. Researchers also noted that speech provides valuable insight into processing speed and overall cognitive function in real-world situations—without the strict time limits that are common in many traditional cognitive assessments.

How This Research Could Change Dementia Detection

The team believes speech analysis could eventually become a practical way to identify people whose cognitive decline is progressing faster than expected. These individuals may face a higher risk of developing dementia.

“This research sets the stage for exciting opportunities to develop tools that could help track cognitive changes in clinics or even at home,” said Dr. Meltzer. “Early detection is critical for any cure or intervention, as dementia involves progressive degeneration of the brain that may be slowed.”

Currently, dementia is often diagnosed only after symptoms become noticeable. By that time, significant brain damage may have already occurred. If speech analysis can detect subtle changes earlier, doctors might be able to intervene sooner with treatments, lifestyle changes, or clinical trials that could slow the disease.

What Experts Generally Say About Speech and Brain Health

Many experts in neurology and geriatric care agree that speech patterns can reveal important information about brain function. However, they caution that occasional pauses or filler words are normal and not a cause for alarm. Everyone says “um” sometimes.

The key is change over time. If you or a loved one notice that speech is becoming noticeably slower, more hesitant, or filled with more pauses than before, it may be worth discussing with a doctor. Speech changes alone are not enough to diagnose dementia, but they can be one piece of a larger picture.

Experts also emphasize that maintaining brain health involves many factors, including physical activity, social engagement, healthy eating, and managing conditions like high blood pressure and diabetes.

Practical Takeaways for Readers

While speech analysis is not yet available as a home test, there are steps you can take to monitor your own brain health:

• Pay attention to changes in your speech patterns over time. If you or family members notice more frequent pauses or word-finding difficulty, mention it to your doctor.
• Stay mentally active by reading, doing puzzles, learning new skills, or having conversations that challenge your thinking.
• Keep physically active with regular exercise, which supports brain health and blood flow.
• Maintain social connections because social interaction helps keep your mind sharp.
• Manage chronic conditions like high blood pressure, diabetes, and high cholesterol, which can affect brain health.
• Get regular check-ups and discuss any cognitive concerns with your healthcare provider.

What Comes Next for This Research

The researchers say more long-term studies are needed to follow changes in speech over time and distinguish normal aging from the earliest signs of disease. They also suggest that combining speech analysis with other health measures could make early detection of cognitive decline more accurate, practical, and widely available.

This study was supported by the Mitacs Accelerate program and the Natural Sciences and Engineering Research Council of Canada (NSERC). Materials were provided by Baycrest Corporate Centre for Geriatric Care.

As research continues, the hope is that one day, a simple conversation—perhaps even a phone call or a chat with a virtual assistant—could help doctors spot early warning signs of dementia. Until then, staying aware of your own speech patterns and overall brain health is a smart step for everyone.

Source: ScienceDaily