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Article Abstract
: Previous studies on perceptual letter-matching have found that younger and older adults showed "fast-same" effects for response time and "false-different" effects for errors but the effects were more pronounced for older adults. According to the , internal noise in visual processing distorts "same" trials into appearing different whereas distortion for "different" trials does not affect performance. Older adults have a "noisier" representation of items within perceptual processing which can impact perceptual matching. However, EEG measures may provide a more direct measure of letter-matching decisions. : We measured the P300 event-related potential (ERP) amplitude, an index of familiarity in stimulus categorization, and behavioral measures (response time and accuracy) to assess letter-matching performance. : Individuals responded faster to "same" trials than to "different" trials but were less accurate. Older adults showed similar P300 amplitudes across trial type whereas younger adults produced a larger amplitude for "same" than "different" trials, suggesting that older adults showed less familiarity for "same" trials than did younger adults - a prediction of the . : These ERP results are consistent with the suggesting that an age-related increase in internal noise affected letter-matching performance.
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| http://dx.doi.org/10.1080/0361073X.2020.1848329 | DOI Listing |
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