[An event-related potential study the on information processing of binocular disparity in random-dot stereogram].
OBJECTIVE
To study the effects of discontinuous-continuous disparity gradient, uncrossed-crossed disparity and small-large disparity in random-dot stereogram (RDS) on the event-related potentials (ERPs).


METHODS
Behavioral data and ERP were recorded when 16 healthy participants (8 males and 8 females) with normal depth perception were performing the task, in which the stereopsis were generated by red-blue glasses.


RESULTS
1) The accuracy in discontinuous disparity gradient was higher than that in continuous disparity gradient, and the accuracy in large disparity was higher than that in small one. 2) Discontinuous disparity gradient elicited shorter N160 latency and larger N350 amplitude than continuous disparity gradient did. Compared with uncrossed disparity, crossed disparity elicited shorter N350 latency. In addition, large disparity elicited shorter N160 latency and larger P280 amplitude than small disparity did.


CONCLUSIONS
The effect of disparity gradient on disparity information processing is significant, and the discontinuous disparity gradient has its processing advantage. Latency of N160 and amplitude of P280 is correlated with the information processing of the size of disparity. N350 component is correlated with the information processing of the uncrossed-crossed information of disparity.
Shen
Mo-wei
MW
Department of Psychology and Behavioral Science, Zhe-jiang University, Hangzhou, China. mwshen@zju.edu.cn
Wang
Rui
R
Tang
Xiao-wei
XW
Zhu
Hai-yan
HY
D000328:Adult; D003867:Depth Perception; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008297:Male; D009903:Optical Illusions; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation; D015357:Vision Disparity / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology*