2026-09-19T21:37:19Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/82190 2023-07-11 col_2142_5131 col_2142_11614 com_2142_5130 com_2142_11613 com_2142_8903

Park, Denise C. Leshikar, Eric Duane 2015-09-25T20:39:31Z 2015-09-25T20:39:31Z 10000-01-01 2009 2009 Examining age and culture effects offers a unique perspective into brain function. In the current set of experiments, the effects of age (young and old) and culture (East Asian and Western) on the activity of the default network was examined in a memory encoding paradigm. With respect to age, it was theorized that suppression deficits in older adults would be compensated for by enhanced frontal recruitment. With respect to culture, a novel framework was proposed predicting modulation differences in default network function. The proposal predicted that chronic attention to context in the East Asians would result in less modulation of the default network in rest versus active cognitive states relative to Westerners. Results confirmed both hypotheses. First, increased frontal recruitment was correlated with suppression deficits in older adults. This correlation appeared only in the better performing older adults suggesting that frontal activity was engaged to compensate for default suppression deficits in the older adults. Further, the frontal default compensatory relationship appeared in the better performing older adults of both cultures, suggesting it may be a common age-related occurrence. Second, younger Western adults showed substantially greater default suppression during high confidence remembered trials relative to forgotten trials, whereas younger East Asians showed limited signs of default modulation across these trials, consistent with the proposed hypothesis. Made available in DSpace on 2015-09-25T20:39:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3392187.pdf: 4530109 bytes, checksum: ed50364c2cd432dad4cf74b93daaa331 (MD5) Previous issue date: 2009 Embargo set by: Seth Robbins for item 83471 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 121 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009. http://hdl.handle.net/2142/82190 (MiAaPQ)AAI3392187 eng Psychology, Psychobiology The Effects of Age and Culture on Default Network Function: Frontal Compensation With Age; Modulation Differences Across Culture text Psychology Psychology University of Illinois at Urbana-Champaign Dissertation Ph.D.