The influence of directed attention at encoding on source memory retrieval in the young and old: An ERP study
| Autor: | Audrey Duarte, Michael R. Dulas |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Adult
Male Aging media_common.quotation_subject Neuropsychological Tests Memory load Developmental psychology Neuroimaging Memory Perception Encoding (memory) Reaction Time Humans Attention Misattribution of memory Evoked Potentials Molecular Biology Aged media_common Cerebral Cortex Brain Mapping Recall Directing attention General Neuroscience Electroencephalography Negativity effect Middle Aged Female Neurology (clinical) Psychology Photic Stimulation Developmental Biology Cognitive psychology |
| Zdroj: | Brain Research. 1500:55-71 |
| ISSN: | 0006-8993 |
| Popis: | Neuroimaging evidence suggests that older adults exhibit deficits in frontally-mediated strategic retrieval processes, such as post-retrieval monitoring. Behavioral research suggests that explicitly directing attention toward source features during encoding may improve source memory for both young and older adults and alleviate age-related source memory impairments, in part, by reducing demands on post-retrieval monitoring. We investigated this hypothesis in the present event-related potential (ERP) study. Young and older adults attended to either objects and their presented color (source) or to the object alone during study and made color source memory decisions at test. We attempted to match performance between groups by halving the memory load for older adults. Behavioral results showed that, while direction of attention to object and color improved source memory for both groups, older adults benefited less than the young. ERPs revealed that demands on late right frontal effects, indicative of post-retrieval monitoring, were similarly reduced by directed attention at encoding for both groups. However, older adults showed reduced ERP correlates of recollection (parietal old–new effect), as well as a sustained widespread negativity, potentially indicative of memory searches for perceptual details in the face of impaired recollection. These results suggest that older adults, like the young, can engage in post-retrieval monitoring when source details are difficult to recover. However, impaired recollection may underlie persistent age-related source memory deficits, even when encoding is supported via directed attention. |
| Databáze: | OpenAIRE |
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