|钟毅平1; 蔡荣华1; 范伟1,2; 杨子鹿1; 喻涛1; 吴云1|
The self-reference effect is the enhanced speed and quality of processing and memorization observed with respect to information that is related to the individual's self-concept. According to previous research, the self-reference effect is different in terms of different degrees of intimacy with the core self. Moreover, the brain process is different in its self-reference data treatment. Highly self-relevant stimuli will get faster responses compared with the minimally self-relevant stimuli in the brain. This is called the degree of self-reference processing effect. On the basis of summarizing the previous research, this study uses the event related potential technology to experimentally investigate the degree of the self-reference processing effect in special subjects and the associated neural mechanisms. The experiment adopted three kinds of classical oddball models, using an implicit way to investigate the introverted individuals self-reference processing degree effect. The experiment used three-character non-name lexical phrases as the standard stimulus and a three-character non-lexical phrase as target stimuli. Six categories of stimuli were used in the three-stimulus oddball paradigm. Three sets of self-relevant stimuli, the non-self- relevant stimulus, and two filler stimuli were served as distracters. The name of each participant was used as the highly self-relevant stimulus, and the name of participant's father was used as the moderating self-relevant stimulus. The name of a Chinese leader was used as the minimally self-relevant stimulus, and the name of the president of the United States was served as the non-self-relevant stimulus. All names were long. Familiarity was equivalent (see below) across all sets of stimulus names. All name stimuli were made into images on a PC using Microsoft Office Picture Manager. Image size, word length, and complexity were matched across the name conditions. We found that on the P2 amplitude, the highly self-related stimuli transmitted via the electrodes at the front and central and front-central positions induced greater P2 amplitude than other stimuli. On the latent period of P2 and via the electrodes placed in the front, central, and parietal positions, the highly self-related stimulation induced was shorter than other stimuli. In N2 amplitude, the highly self-related name induced larger P2 amplitude than other stimuli in the left brain. Compared with introversive subjects, the control group subjects who were stimulated with highly self- relevant names induced larger amplitude of N2 than other stimulations. In the latent period of N2, highly self-relevant stimuli in the whole brain induced the short latent period of N2, which was better than other stimuli, and that induced via the central-parietal positioned electrodes was the shortest. Highly self-relevant names in two types of personality subjects induced shorter incubation period of N2 than other stimuli, but the control group subjects was the shortest. On average amplitude of P3, highly self-relevant stimuli in the whole brain induced by the P3 amplitude were bigger than other stimuli. The effect of midline brain regions was the largest. Research results showed that there was degree of self-reference processing to the self-reference effect. Highly self-relevant stimuli obtained deeper and more exquisite processing than moderately and minimally self-relevant stimuli. Compared with the control group, the introversive subject was weaker in the degree of self-reference processing effect. And in early stages, highly self-relevant stimuli in the control group individuals induced faster processing in the brain than the minimally self-related stimuli. In the later stage of cognition, highly self-relevant stimuli obtained deeper and more elaborate processing.
|关键词||内倾 自我参照加工 程度效应 ERPs N2 P300|
|项目资助者||国家自然科学基金面上项目(31171003) ; 教育部高等学校博士学科点专项科研基金(博导类)(20124306110010) ; 中国博士后科学基金面上项目(2014M561086) ; 教育部人文社会科学研究规划基金项目项目(13YJA190001) ; 湖南省自然科学基金(2015JJ2101,2015JJ2097)的资助|
|钟毅平,蔡荣华,范伟,等. 内倾特质个体的自我参照加工程度效应[J]. 心理科学,2015,38(3):672-679.|
|MLA||钟毅平,et al."内倾特质个体的自我参照加工程度效应".心理科学 38.3(2015):672-679.|