Idea density measured in late life predicts subsequent cognitive trajectories: Implications for the measurement of cognitive reserve

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

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 specific 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.

Original languageEnglish (US)
Pages (from-to)677-686
Number of pages10
JournalJournals of Gerontology - Series B Psychological Sciences and Social Sciences
Volume67 B
Issue number6
DOIs
StatePublished - Nov 2012

Fingerprint

Cognitive Reserve
Aptitude
Episodic Memory
Linguistics
Semantics
Cognition
Dementia
Executive Function
ability
dementia
adulthood
cognition
semantics
linguistics
Education
old age
Spatial Navigation
evidence
education

Keywords

  • Cognitive aging
  • Cognitive reserve
  • Idea density
  • Linguistic ability

ASJC Scopus subject areas

  • Geriatrics and Gerontology
  • Gerontology
  • Clinical Psychology
  • Social Psychology
  • Medicine(all)

Cite this

@article{14385e07cb5248e5b28a8f85ee532f67,
title = "Idea density measured in late life predicts subsequent cognitive trajectories: Implications for the measurement of cognitive reserve",
abstract = "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 specific 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.",
keywords = "Cognitive aging, Cognitive reserve, Idea density, Linguistic ability",
author = "{Tomaszewski Farias}, {Sarah E} and Vineeta Chand and Lisa Bonnici and Kathleen Baynes and Harvey, {Danielle J} and Mungas, {Dan M} and Christa Simon and Reed, {Bruce R}",
year = "2012",
month = "11",
doi = "10.1093/geronb/gbr162",
language = "English (US)",
volume = "67 B",
pages = "677--686",
journal = "Journals of Gerontology - Series B Psychological Sciences and Social Sciences",
issn = "1079-5014",
publisher = "Gerontological Society of America",
number = "6",

}

TY - JOUR

T1 - Idea density measured in late life predicts subsequent cognitive trajectories

T2 - Implications for the measurement of cognitive reserve

AU - Tomaszewski Farias, Sarah E

AU - Chand, Vineeta

AU - Bonnici, Lisa

AU - Baynes, Kathleen

AU - Harvey, Danielle J

AU - Mungas, Dan M

AU - Simon, Christa

AU - Reed, Bruce R

PY - 2012/11

Y1 - 2012/11

N2 - 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 specific 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.

AB - 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 specific 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.

KW - Cognitive aging

KW - Cognitive reserve

KW - Idea density

KW - Linguistic ability

UR - http://www.scopus.com/inward/record.url?scp=84867824554&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867824554&partnerID=8YFLogxK

U2 - 10.1093/geronb/gbr162

DO - 10.1093/geronb/gbr162

M3 - Article

C2 - 22357642

AN - SCOPUS:84867824554

VL - 67 B

SP - 677

EP - 686

JO - Journals of Gerontology - Series B Psychological Sciences and Social Sciences

JF - Journals of Gerontology - Series B Psychological Sciences and Social Sciences

SN - 1079-5014

IS - 6

ER -