TitleDifferential age effects in semantic and episodic memory.
Publication TypeJournal Article
Year of Publication2002
AuthorsAllen, PA, Sliwinski, M, Bowie, T, Madden, DJ
JournalJ Gerontol B Psychol Sci Soc Sci
Date Published2002 Mar
KeywordsAdolescent, Adult, Age Factors, Aged, Aged, 80 and over, Aging, Factor Analysis, Statistical, Humans, Language Tests, Memory, Middle Aged, Reaction Time, Task Performance and Analysis, Vocabulary

<p>Results from 4 experimental tasks and 8 data sets (the 4 tasks involved either multiple sessions or different stimuli) as well as a vocabulary test conducted on the same 80 participants (40 younger and 40 older adults) are reported. The authors employed 2 semantic memory tasks (lexical decision and multiplication verification) using data from 2 sessions (for a total of 4 semantic data sets) and 2 episodic memory tasks (hybrid visual search and memory search with digits and with words as stimuli). Factor analyses using slope and intercept data from the 8 experimental data sets indicated the presence of 3 latent factors: a single intercept factor for both episodic and semantic tasks and separate slope factors for episodic and semantic tasks. A structural equation model with paths from age to 3 different 1st-order latent factors (episodic central processes, semantic central processes, and combined episodic and semantic peripheral processes) fit better than general factor models. These data are consistent with a theoretical framework in which there are age-related dissociations between peripheral and central processes across semantic and episodic memory.</p>

Alternate JournalJ Gerontol B Psychol Sci Soc Sci
PubMed ID11867665
Grant ListAG09282 / AG / NIA NIH HHS / United States