一项关于自我积极偏差的脑电分析-an eeg analysis on self-positive deviation.docxVIP

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一项关于自我积极偏差的脑电分析-an eeg analysis on self-positive deviation.docx

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一项关于自我积极偏差的脑电分析-an eeg analysis on self-positive deviation

Procedure27Electrode and time window27Results28Behavioural results28ERP results28Discussions33Experiment 433Participants33Stimuli34Procedure34Electrode and time window34Results34Behavioural results34ERP results35Discussions40General discussion40P200 and perception40N400 and integration41LPP and evaluation43Conclusions44References46Appendix I48Appendix II49Appendix III50Acknowledgment56AbstractThe basic cognitive processes in both self-relatedness evaluation and others mind representation include three stages: perception of social targets, integration of perceptions and memory, and evaluation. The three components, P200, N400 and LPP, are well-established indices of neural and cognitive resource allocation during the three kinds of cognitive processes of perception, integration and evaluation. Four event-related potential (ERP) experiments on self- and other-evaluation, with a 2 (Referential: Self vs Other) × 2 (Valence: Positive vs Negative) design, were conducted, in which self-referential effect paradigm was conducted to examine the positive bias of self-evaluation. In Experiment 1, pronouns were primes. In Experiment 2, adjectives were primes. In Experiment 3 and 4, pronouns and adjectives were presented simultaneously with subjects instructed to judge on them in Experiment 3 and to only watch them in Experiment 4. Effects were found in the present study which investigated the positive bias of self-evaluation using SRE via ERP during three cognitive processes of self-evaluation. Firstly, RT indicated that subjects responded faster to positive self-referential words than to words under other conditions. Secondly, in perception stage, effects showed that positive other referential (vs negative other referential) stimuli and negative self referential stimuli (vs positive self referential) enhanced the amplitude of P200. In integration stage, effects reflected that positive other referential stimuli (vs negative other referential stimuli) and negative self referentia