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Age-Related Changes in Audiovisual Simultaneity Perception and Their Relationship With Working Memory
Yi-Chuan Chen1, Su-Ling Yeh2,3, Pei-Fang Tang4,5
1Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.
Summary
Audiovisual simultaneity perception declines with age, affecting both sensory integration and executive functions. This decline in perceiving simultaneous visual and auditory stimuli is linked to reduced working memory capacity in older adults.
Area of Science:
- Cognitive Neuroscience
- Human Perception
- Aging Research
Background:
- Effective integration of multisensory information, particularly audiovisual stimuli, is crucial for human function.
- Age-related changes can impact sensory perception and cognitive abilities, affecting daily tasks.
Purpose of the Study:
- To investigate age-related alterations in audiovisual simultaneity perception.
- To explore the relationship between audiovisual simultaneity perception and working memory in aging.
Main Methods:
- Audiovisual simultaneity perception was assessed using a simultaneity judgment task across different age groups (young, middle-aged, older adults).
- Perceptual precision, point of subjective simultaneity (PSS), and response errors were quantified.
- Visual working memory was evaluated using the Cambridge Neuropsychological Test Automated Battery (CANTAB).
Main Results:
- Middle-aged and older adults exhibited reduced precision and a shift in PSS towards visual-leading stimuli compared to young adults.
- Increased response errors were observed in older adults, particularly for visual-leading stimuli.
- Higher response errors in simultaneity judgment correlated with poorer spatial recognition memory.
Conclusions:
- Age-related declines in audiovisual simultaneity perception begin in middle age, impacting both perceptual and executive functions.
- Executive abilities may underlie shared age-related declines in audiovisual perception and visual working memory.
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