Time of day affects episodic memory in older adults

Barbara Martin, Angela L H Buffington, Kathleen A. Welsh-Bohmer, Jason Brandt

Research output: Contribution to journalArticle

Abstract

The neuropsychological test scores of 2,030 cognitively normal older adults were examined to evaluate performance patterns as they related to time of day (TOD) at which testing was initiated. Multiple regression analyses were used to examine the association of TOD with scores on seven neuropsychological tests used in the clinical evaluation of dementia. Episodic memory performance was significantly related to TOD, while memory span and verbal fluency were not. Best performance occurred during early morning hours and late afternoon; worst performance occurred mid-day (i.e., noon). These findings may have implications for clinical assessment, the design of research on dementia, and the daily functioning of older adults.

Original languageEnglish (US)
Pages (from-to)146-164
Number of pages19
JournalAging, Neuropsychology, and Cognition
Volume15
Issue number2
DOIs
StatePublished - Mar 2008

Fingerprint

Episodic Memory
Neuropsychological Tests
Dementia
Research Design
Regression Analysis

Keywords

  • Aging
  • Circadian rhythms
  • Dementia
  • Episodic memory
  • Performance variability

ASJC Scopus subject areas

  • Psychology(all)
  • Developmental and Educational Psychology
  • Experimental and Cognitive Psychology

Cite this

Time of day affects episodic memory in older adults. / Martin, Barbara; Buffington, Angela L H; Welsh-Bohmer, Kathleen A.; Brandt, Jason.

In: Aging, Neuropsychology, and Cognition, Vol. 15, No. 2, 03.2008, p. 146-164.

Research output: Contribution to journalArticle

Martin, Barbara ; Buffington, Angela L H ; Welsh-Bohmer, Kathleen A. ; Brandt, Jason. / Time of day affects episodic memory in older adults. In: Aging, Neuropsychology, and Cognition. 2008 ; Vol. 15, No. 2. pp. 146-164.
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