Distinct Mechanisms in Number Comparison of Random and Regular Dots: An ERP Study

Frontiers in Behavioral Neuroscience

Ying Fu²  Lu Wang²  Zhijun Zhang²  Yajun Zhao³  Wei Liu⁴  Chunhui Wang⁴ 

[1] College of Education, Dali University, Dali, China;Department of Psychology and Behavioral Sciences, Zhejiang University, Hangzhou, China;School of Education and Psychology, Southwest Minzu University, Chengdu, China;School of Education, Yunnan Minzu University, Kunming, China;

关键词: numerosity perception;    density perception;    P2p components;    element distribution;    distance effect;   

DOI  :  10.3389/fnbeh.2021.791289

来源: DOAJ

【 摘 要 】

Numerosity comparison for regular patterns shows different features compared with that for random ones in previous studies, suggesting an underlying mechanism distinct from numerosity. In this study, we went further to compare the event-related potentials (ERP) components in numerosity processing of random and regular patterns, which are identical in all aspects of texture features except for the distribution. ERP components were recorded and analyzed while participants compared which of the two successively presented sets was more numerous. P2p amplitude was revealed to be significantly weaker for regular patterns compared with that for random patterns over right occipital-parietal cites, whereas no difference was found for P1 or N1 components. The difference in P2p amplitude, which is consistent with the behavior dissociation revealed in our previous studies, suggests that regular distribution can trigger distinct processing in numeral comparison tasks. Processing of continuous magnitudes or configuration cannot explain the decrease in P2p amplitude for regular distributed patterns. Therefore, this study further supports that P2p is mediated by numerosity processing.

【 授权许可】

Unknown