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Published on: January 24, 2020
Short-term practice effects and variability in cognitive testing in a healthy elderly population.
Lene Krenk1, Lars S Rasmussen, Volkert D Siersma
1Section of Surgical Pathophysiology, Rigshospitalet, University of Copenhagen, Denmark. Lene.krenk@rh.regionh.dk
Experimental Gerontology
|April 4, 2012
Summary
Cognitive testing in older adults shows significant improvement with repeated practice. Understanding this practice effect is crucial for accurately assessing cognitive changes over time.
Area of Science:
- Gerontology
- Neuropsychology
- Cognitive Science
Background:
- Cognitive decline in the elderly is a key research area.
- Consensus on defining significant cognitive decline with repeated testing is lacking.
- Cognitive test interpretation must account for practice effects and performance variability.
Purpose of the Study:
- To collect cognitive test results from repeated testing in healthy elderly individuals.
- To evaluate the impact of practice effects on cognitive performance in older adults.
Main Methods:
- 161 healthy participants aged 60+ were included.
- Cognitive testing was conducted at baseline, 1 week, and 3 months.
- Practice effect was assessed across 7 neuropsychological measures using z-scores > 1.96.
Main Results:
- Significant score improvements (p<0.05) were observed in 2 measures between baseline and the 2nd test.
- Significant score improvements were noted in 6 of 7 measures between baseline and the 3rd test.
- No correlation found between practice effect magnitude and age or education.
Conclusions:
- Practice effects significantly influence cognitive test results in the elderly over short durations.
- Variability in cognitive testing performance is a critical factor in elderly assessment.
- Accurate evaluation of cognitive changes requires consideration of practice effects.
