To explore the properties of event-related potential(ERP)related with recognition memory in the time
frequency and spatial domains
nonnegative tensor factorization(NTF)was applied to extract multi-domain feature from ERP signals related with “New” stimulus and “Old” stimulus respectively during recognition memory task
which is different from the traditional method to extract the feature of time domain
and the multi-domain feature was extracted from time-frequency transformation of multiple channel ERP signals so that it can reflect the properties of ERP in the time
frequency and spatial domains simultaneously. It is discovered that the multi-domain feature is able to discriminate ERP for different stimulus. The multi-domain feature of FN400 related with frontal old/new effect to “New” stimulus gets greater than the feature to “Old” stimulus. The multi-domain feature of P600 associated with parietal old/new effect to “Old” stimulus gets larger than the feature to “New” stimulus. Therefore
the multi-domain feature extracted by NTF reveals properties of ERP in the time
frequency and spatial domains
and provides a novel method to recognition memory research and cognitive function research based on ERP signal.
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references
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