The influence of picture-word delayed matching encoding on episodic retrieval: An event-related potential study

Abstract

An event-related potential study was conducted to make clear that how picture-word delayed matching encoding affects upon episodic retrieval, and to further investigate the relationship between encoding and episodic retrieval by ERP source analysis using the LORATA method (low resolution electromagnetic tomography, via Curry V6.0). The experiment used learning and recognition paradigm. The results showed that the identical matching encoding facilitated episodic retrieval, and there was extra activation of Lingual gyrus in the identical match old condition in ERP source analysis, whereas the categorical matching and non-match conditions showed similar mechanisms. Casting back to the encoding processing, it was shown that in the identical match condition an early P300 component from 350 to 450ms was evoked. Our results suggest that the early P300 component evoked by the picture-word identical matching is the critical factor affecting episodic retrieval.