Cognitive Performance Variability and Its Impact
Author Information
Author(s): Klepacz Laura, Cerino Eric, Pierce Matthew, Hamm Jeremy
Primary Institution: North Dakota State University
Hypothesis
Does variability in cognitive performance always indicate cognitive decline, or can it be beneficial for certain sociodemographic groups?
Conclusion
The study found that cognitive performance variability may be linked to healthier cognitive aging in certain populations at risk for cognitive impairment.
Supporting Evidence
- Increases in cognitive performance variability were associated with shallower declines in cognitive performance among older adults.
- Women showed a strong positive association between cognitive variability and performance.
- Individuals with less education had a significant link between variability and cognitive performance.
- Lower income individuals also demonstrated a positive association between cognitive variability and performance.
Takeaway
Sometimes, when people do better or worse on different brain tests, it can actually mean they're aging well, especially for older adults, women, and those with less education or lower income.
Methodology
The study used OLS regression models to analyze how age, sex, income, and education moderated the relationship between cognitive performance variability and cognitive performance changes.
Participant Demographics
Participants were aged 33 to 83 years, with an average age of 55 and a standard deviation of 11.2 years.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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