Maintaining a sharp mind as people grow older is a priority for many. While changes in memory and thinking often accompany aging, researchers aim to understand why some older adults retain their cognitive abilities more effectively. New research on adults over 65 provides insights into this topic.
Across two studies, scientists examined factors linked to enhanced performance in language, memory, and information processing tasks. Findings suggest that resources built over a lifetime may support healthier cognitive aging.
Cognitive Reserve and Language Skills
Researchers defined cognitive reserve as mental resources accumulated through education, intellectually stimulating jobs, and engaging hobbies. This reserve may help the brain cope with age-related changes. In the first study, investigators focused on language abilities, specifically the retrieval of words and expression skills.
Older adults with higher cognitive reserve performed better on language tasks, sometimes matching younger participants. Positive emotions correlated with stronger language abilities, further highlighting the impact of cognitive reserve.
An interesting discovery came from analyzing verbal fluency in the first 10 seconds of tasks. Traditional assessments span one minute, but the initial moments revealed early signs of decline. However, those with higher cognitive reserve showed a much smaller decline or none at all, suggesting these reserves preserve more youthful language abilities.
Emotion influenced language performance. Words associated with positive emotions were more easily retrieved than those linked to negative emotions, implying that both cognitive reserve and emotional content impact language processing in later life.
Working Memory and Emotional Influence
The second study focused on working memory, or the ability to temporarily hold, process, and use information to complete tasks. Aging usually diminishes working memory efficiency, so researchers explored factors supporting it. Participants over 65 tackled a task involving faces and focused either on age or emotional expression.
Cognitive reserve again proved significant. Those with higher reserves excelled in accuracy across task versions. This highlights cognitive reserve’s fundamental role in maintaining information manipulation for tasks.
The study showed improved performance when emotional information was in play, suggesting that emotional content aids cognitive processing efficiency.
Emotional intelligence was examined too, defined as the capacity to recognize, understand, and utilize emotions. Higher emotional intelligence participants took longer to respond to emotional stimuli, indicating deeper processing rather than difficulty.
Overall, findings suggest cognitive reserve and emotional skills jointly support healthy cognitive aging. Reserve benefits language and memory, while emotional abilities enhance processing efficiency.
Experts recommend strengthening cognitive reserve through lifelong learning, regular exercise, stimulating activities, social engagement, and enriching experiences.
The research was part of the Italian program Age-It: Ageing Well in an Ageing Society, which addresses challenges and opportunities of aging populations.
Reference: Rumiati. Brain Sciences. DOI: 10.3390/brainsci16070725
Contact Newsweek editors on this story: Kara Dolman and Gray R. Thomas
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