Idea Density Measured in Late Life Predicts Subsequent Cognitive Trajectories: Implications for the Measurement of Cognitive Reserve
| Autor: | Kathleen Baynes, Bruce R Reed, Dan M Mungas, Danielle J Harvey, Sarah E Tomaszewski Farias, Christa Simon, Vineeta Chand, Lisa M. Bonnici |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Aging Social Psychology Severity of Illness Index Original Research Report Developmental psychology Cognitive Reserve medicine Semantic memory Dementia Humans Longitudinal Studies Cognitive decline Episodic memory Cognitive reserve Aged Memory Disorders Neuropsychology Cognition Middle Aged medicine.disease Clinical Psychology Mental Health Socioeconomic Factors Female Geriatrics and Gerontology Psychology Cognition Disorders Comprehension Gerontology Neurocognitive |
| Zdroj: | Journals of Gerontology Series B: Psychological Sciences and Social Sciences. 67(6):677-686 |
| Popis: | Objective. The Nun Study showed that lower linguistic ability in young adulthood, measured by idea density (ID), increased the risk of dementia in late life. The present study examined whether ID measured in late life continues to predict the trajectory of cognitive change. Method. ID was measured in 81 older adults who were followed longitudinally for an average of 4.3 years. Changes in global cognition and 4 specifi c neuropsychological domains (episodic memory, semantic memory, spatial abilities, and executive function) were examined as outcomes. Separate random effects models tested the effect of ID on longitudinal change in outcomes, adjusted for age and education. Results. Lower ID was associated with greater subsequent decline in global cognition, semantic memory, episodic memory, and spatial abilities. When analysis was restricted to only participants without dementia at the time ID was collected, results were similar. Discussion. Linguistic ability in young adulthood, as measured by ID, has been previously proposed as an index of neurocognitive development and/or cognitive reserve. The present study provides evidence that even when ID is measured in old age, it continues to be associated with subsequent cognitive decline and as such may continue to provide a marker of cognitive reserve. |
| Databáze: | OpenAIRE |
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