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Published on: November 19, 2014
The Processing of Causal and Hierarchical Relations in Semantic Memory as Revealed by N400 and Frontal Negativity
Xiuling Liang1, Qingfei Chen2, Yi Lei1
1Research Centre for Brain Function and Psychological Science, Shenzhen University, Shenzhen, China.
Abstract:
Most current studies investigating semantic memory have focused on associative (ring-emerald) or taxonomic relations (bird-sparrow). Little is known about the question of how causal relations (virus-epidemic) are stored and accessed in semantic memory. The goal of this study was to examine the processing of causally related, general associatively related and hierarchically related word pairs when participants were required to evaluate whether pairs of words were related in any way. The ERP data showed that the N400 amplitude (200-500 ms) elicited by unrelated related words was more negative than all related words. Furthermore, the late frontal distributed negativity (500-700 ms) elicited by causally related words was smaller than hierarchically related words, but not for general associated words. These results suggested the processing of causal relations and hierarchical relations in semantic memory recruited different degrees of cognitive resources, especially for role binding.
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