title: Numerical distance effect in the N240 component in a number-matching task.
abstract: The event-related potential technique was used to investigate the time course and scalp-potential topography for the numerical distance effect in a number-matching task. Twenty undergraduates judged whether a number matched or did not match another number presented 1.5 s earlier. Compared with number pairs with a 'small' numerical distance (distance=1), number pairs with a 'large' numerical distance (greater than 2) showed a longer latency and a greater positive amplitude in the N240 component. This numerical distance effect was limited to fronto-central electrodes. These results were discussed in terms of the neural bases of the numerical distance effect during the automatic processing of numbers.
authors.affiliation: State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China.
authors.forename: Xinlin
authors.initials: X
authors.lastname: Zhou
authors.forename: Chuansheng
authors.initials: C
authors.lastname: Chen
authors.forename: Qi
authors.initials: Q
authors.lastname: Dong
authors.forename: Hongchuan
authors.initials: H
authors.lastname: Zhang
authors.forename: Chunhui
authors.initials: C
authors.lastname: Chen
authors.forename: Sibing
authors.initials: S
authors.lastname: Qiao
authors.forename: Hui
authors.initials: H
authors.lastname: Zhao
authors.forename: Ting
authors.initials: T
authors.lastname: Jiang
authors.forename: Yi
authors.initials: Y
authors.lastname: Guo
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D005625:Frontal Lobe / Q000502:physiology; D006801:Humans; D008297:Male; D008433:Mathematics; D008606:Mental Processes / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology