The N170 Adapation Effect Of Radical Perceptual Processing On Chinese Character

Word recognition mechanism study is an important frontiers of psychology.Word is one of the most familiar visual stimuli in our daily life which we learn by reading or writing.Recently studies have found that the N170 component is sensitive to word and the rapid adaptation paradigm with Event-related Potentials(ERP)is a sensitive and effective way to examine word processing.Although radical plays an important role in word perception,previous behavioral and ERP studies have found it difficult to fine-distinguish which radical play more important role.The N170 adaptation paradigm gives us a new inspiration to promote this issue.Hence the purpose of the present study is to reveal the inherence of radical on word perception with N170 adaptation paradigm by manipulating words' radical.This study consisted of two experiments.ERP rapid adaptation paradigm adopted by Cao et al.(2015)was used to explore the influence of radical on Chinese character N170 adaptation effect.In Experiment 1A and 1B,we investigated the Chinese character N170 adaptation effect by manipulating the difference of sequential stimuli in radical level.In Experiment 1C aimed to examine the effect of phonetics of radical on Chinese character N170 adaptation effect.The Experiment 2 used pseudo-characters that accorded with orthography and false-characters that didn't accord with orthography to explore the influence of orthographic rules on Chinese character N170 adaptation effect.In brief,this research investigated the influence of radical on Chinese character N170 adaptation effect by finely manipulating the relationship between adaptive stimuli and test stimuli,in order to promote the understanding of radical perceptual processing on Chinese character.The results and conclusions were as follows:(1)Compared with house adaptive stimuli,all words adaptive stimuli produced adaptation effect on the amplitude and latency of N170,indicating that the N170 adaptation effect was a stable effect in Chinese character processing.(2)The amplitude of N170 induced by test stimuli with the same radical was significantly smaller than that without the same radical,indicating that radical could modulated N170 components and that radical had been processed at about 170 ms when the Chinese character was presented.(3)The results indicated that there is no significant difference in the amplitude and latency of N170 when the adaptive stimuli and the test stimuli have the same radical,regardless of whether the pronunciation was the same or not.When the adaptive stimuli and test stimuli have same radical,the N170 amplitude induced by the test is significantly lower than that of the different radical,even if they have same pronunciation,indicating that the form of radical could modulated N170 adaptation effect,rather than the pronunciation of radical.(4)And the results showed that if the adaptive stimuli were real-characters or pseudo-characters,the test stimuli which had the same component with adaptive stimuli would activate significant less N170 amplitude than that activated by which didn't have the same component with adaptive stimuli;and when the adaptive stimuli were false-characters,the N170 amplitude were not significant difference between with-same component and without-same component condition.The findings indicated that the orthographic rules could modulate the N170 amplitude adaptation effect.(5)When the adptive stimuli is familiar real-characters,the amplitude of N170 induced by test stimuli was larger than that the adptive stimuli is unfamiliar pseudo-characters and false-characters.These findings demonstrated the familiarity of adaptive stimuli could modulated the N170 adaptation effect.In conclusion,this research found that Chinese character N170 adaptation effect was a stable processing effect,which could modulated by radical.