Lipreading, processing speed, and working memory in younger and older adults

Area of Science:

• Cognitive Psychology
• Auditory Perception
• Human Aging

Background:

• Lipreading ability varies significantly among individuals.
• Cognitive and perceptual factors are hypothesized to influence lipreading performance.
• Age-related cognitive changes may impact sensory processing.

Purpose of the Study:

• To investigate the role of working memory (WM) and processing speed (PS) in lipreading.
• To explore perceptual abilities like closure and disembedding skill in lipreading.
• To determine if these cognitive patterns differ across age groups.

Main Methods:

• Compared 43 younger adults (mean age 20.8) and 38 older adults (mean age 76.8).
• Assessed lipreading ability, verbal WM, spatial WM (SWM), PS, and perceptual skills.
• Analyzed predictor variables across age groups.

Main Results:

• Younger adults outperformed older adults in lipreading and perceptual skills.
• Younger participants had superior WM spans and faster PS.
• SWM and PS significantly predicted lipreading ability in both age groups, with consistent patterns.

Conclusions:

• Individual differences in SWM and PS partially explain variability in lipreading.
• Age-related decline in SWM and PS may contribute to poorer lipreading in older adults.
• These cognitive factors are crucial for understanding lipreading performance across the lifespan.