Study on EPRs Based Early Dissociation between Inversion and Mirror Effects of Chinese Characters
Abstract：Objective To investigate the early perceptual processing between inversion and mirror effects of Chinese characters. Methods Scalp EEG (64 channels) signals were recorded in 16 healthy, right-handed university students who were asked to perform an orientation decision task for single Chinese characters presented at upright, inverted, mirror, or mirror-inverted orientations. Results 1) Compared with upright Chinese characters, the latent period of occipital-temporal N170 of both the inversion and mirror were significantly delayed ( P =0. 049 ;P =0. 938), but not enhanced in amplitude (P =0. 983). 2) The analysis for topographies within the N170 time window showed different patterns between the inverted and mirror characters (P = 0. 036). It was suggested that two types of Chinese characters might originate from different generators; 3 ) Compared with the upright characters, the mirror characters enhanced the occipital and occipital-parietal P_2 ( P = 0. 02) , whereas the inverted characters did not(P =0. 102). Conclusion There is an early perceptual dissociation between inversion and mirror effects of Chinese characters.
Keywords：inversion effectmirror effectperceptual dissociationevent-related potentials
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)