| Stimuli with high social or adaptive significance(such as self-name)can automatically capture attention,resulting in further preferential and elaborate processing.Meanwhile,emotional stimuli can also automatically capture attention and command more cognitive resources because of its inherent significance and prominence.Previous studies have found that the processing of self-related information and emotional information is carried out in an independent manner and interacts with each other.In current study,we aim to explore the dynamic temporal process and integration mechanism of self-name and emotional information,usinginthe event-related potentials(ERPs)with high temporal resolution.In the experiment 1,to investigate whether the processing of self-related information influence the cognitive process of emotional words,we used the self-,friend-,and unfamiliar name as self-relevance clues and asked participants to silently read names(self-name,friends’ name and unfamiliar name)and emotional words(positive,neutral,and negative)presented in succession without telling them that the presented words are emotional ones.ERP results showed that both EPN and LPP components were elicited and modulated by emotional words.Specifically,negative words induced larger EPN and LPP relative to positive and neutral words.In addition,the interactions between name and emotional words were found in the late stage.LPP was more positive for negative words when paired with self-name than neutral words,while negative and neutral words when paired with friend’s name evoked enhanced LPP than positive words.However,there was no significant difference in LPP induced by emotional words when pried with unfamiliar names.Our results demonstrate that self-reference acts as an initial processing filter for name and emotional information to receive integrated processing.What’s more,threat information still occupies priority processing in this stage,which reflects that self-related information can enhance the motivational relevance of the stimulus and enhance the orientation of attention.In the experiment 2,we used self and unfamiliar names expressed with different emotional prosody as materials to investigate the cognitive neural processing of self-name under non-attention conditions using passive auditory oddball paradigm.The results showed that the recognition of self and unfamiliar names occurs during 170 to 220 ms,that is,the self-name uttered bdxy neutral prosody induced more negative MMN than unfamiliar name.At 220-300 ms,self-name and anger prosody elicited significantly more negative MMN than unfamiliar name and neutral prosody respectively.More importantly,self-name uttered by anger prosody evoked more negative MMN relative to unfamiliar name uttered by anger prosody and self-name uttered by neutral prosody respectively.This indicates that individuals can distinguish self-and other-name automatically even at the preattentive stage of auditory processing.In 300-500 ms,self-name induced a smaller P3 a than unfamiliar name,which indicates that the processing of self-related information involves less cognitive resources.In summary,the following conclusions are obtained:1.In the preattentive stage of auditory processing,the processing of self-name and emotional prosody is highly automatic.And these two information are not only processed in an independent manner but also interact each other;2.The recognition of self-name and other name can effectively modulate the cognitive processing of emotional words in attended conditions,indicating that individuals use self-correlation as an initial filter for the further cognitive processing of emotional stimuli.3.Either in attended or preattentive condition,the neural processing of emotional information and self-name interact with each other,and this interaction occurs not only in the visual channel but also in the auditory channel. |
