东南大学学报（英文版）2021，Vol.37Issue(4)：379-387,9.DOI:10.3969/j.issn.1003-7985.2021.04.006
小数和分数加工策略的神经电位差异
Dissociated neural potential for processing strategies between decimals and fractions
摘要
Abstract
The entity and symbolic fraction comparison tasks separating identification and semantic access stages based on event-related potential technology were used to investigate neural differences between fraction and decimal strategies in magnitude processing of nonsymbolic entities and symbolic numbers.The experimental results show that continuous entities elicit stronger left-lateralized anterior N2 in decimals,while discretized ones elicit more significant right-lateralized posterior N2 in fractions during the identification stage.On the other hand,decimals elicit stronger N2 over the left-lateralized fronto-central sites while fractions elicit the more profound P2 over the right-lateralized fronto-central sites and N2 at biparietal regions during the semantic access stage.Hence,for nonsymbolic entity processing,alignments of decimals and continuous entities activate the phonological network,while alignments of fractions and discretized entities trigger the visuospatial regions.For symbolic numbers processing,exact strategies with rote arithmetic retrieval in verbal format are used in decimal processing,while approximate strategies with complex magnitude processing in a visuospatial format are used in fraction processing.关键词
小数/分数/精确策略/近似策略/事件相关电位/P2/N2Key words
decimal/fraction/exact strategy/approximate strategy/event-related potential(ERP)/P2/N2分类
信息技术与安全科学引用本文复制引用
林娉婷,朱艳梅,张莉,柏毅,王海贤..小数和分数加工策略的神经电位差异[J].东南大学学报（英文版）,2021,37(4):379-387,9.基金项目
The National Natural Science Foundation of China(No.62077013,61773114),the Jiangsu Provincial Innovation Project for Scientific Research of Graduate Students in Universities (No.KY-CX17_0160). （No.62077013,61773114）
