2014
DOI: 10.1016/j.biopsycho.2014.05.010
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Age-related changes in feature-based object memory retrieval as measured by event-related potentials

Abstract: To investigate neural mechanisms that support semantic functions in aging, we recorded scalp EEG during an object retrieval task in 22 younger and 22 older adults. The task required determining if a particular object could be retrieved when two visual words representing object features were presented. Both age groups had comparable accuracy although response times were longer in older adults. In both groups a left fronto-temporal negative potential occurred at around 750 msec during object retrieval, consisten… Show more

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Cited by 11 publications
(28 citation statements)
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References 84 publications
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“…These effects have been consistently shown in all previous SORT studies using only visual words as stimuli (Brier et al, 2008;Chiang et al, 2014Chiang et al, , 2015. As proposed before, this difference between conditions may indicate a longer and more exhaustive search in non-retrieval compared to retrieval trials that is required before making a decision (Chiang et al, 2014); this search seems to last even longer in the verbal domain (VW and AW) compared to the nonverbal domain (Pic) when non-retrieval RT was considered. In terms of EEG data, stimulus-locked and response-locked analyses rendered separate findings but will be Fig.…”
Section: Discussionmentioning
confidence: 71%
See 1 more Smart Citation
“…These effects have been consistently shown in all previous SORT studies using only visual words as stimuli (Brier et al, 2008;Chiang et al, 2014Chiang et al, , 2015. As proposed before, this difference between conditions may indicate a longer and more exhaustive search in non-retrieval compared to retrieval trials that is required before making a decision (Chiang et al, 2014); this search seems to last even longer in the verbal domain (VW and AW) compared to the nonverbal domain (Pic) when non-retrieval RT was considered. In terms of EEG data, stimulus-locked and response-locked analyses rendered separate findings but will be Fig.…”
Section: Discussionmentioning
confidence: 71%
“…ERP derive from averaging of EEG epochs to capture consistent changes in phase-locked neural activity as reflected in the timing and shape of ERP waveforms (Luck, 2005). To date, several neurophysiological studies using either technique have been performed to examine semantic object memory retrieval during SORT (Ferree et al, 2009;Brier et al, 2008;Chiang et al, 2014Chiang et al, , 2015.…”
Section: Introductionmentioning
confidence: 99%
“…Healthy adults demonstrate an ERP amplitude divergence starting at approximately 750 msec post-stimulus in the left fronto-temporal regions when comparing retrieval and non-retrieval word pairs. 15 Previous studies of disordered populations found that condition-related differences in ERP amplitude on the SORT task correlated with memory deficits. 16 , 17 …”
Section: Introductionmentioning
confidence: 98%
“…Delayed N2 latencies relative to controls have also been demonstrated in people with amnestic MCI during semantic categorization (Mudar et al, 2016). Chiang et al (2014) examined semantic function in younger and older healthy adults using an object retrieval task, whereby participants were presented with word pairs and judged whether each pair elicited retrieval of an object or not. While both younger and older adults had similar ERP responses to retrieval trials, a late positive frontal potential was observed for nonretrieval trials only in the older adults.…”
mentioning
confidence: 99%