Numerical distance effect in the N240 component in a number-matching task.
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.
Zhou
Xinlin
X
State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China.
Chen
Chuansheng
C
Dong
Qi
Q
Zhang
Hongchuan
H
Chen
Chunhui
C
Qiao
Sibing
S
Zhao
Hui
H
Jiang
Ting
T
Guo
Yi
Y
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