双关图作为面孔刺激与非面孔刺激对大脑事件相关电位的影响  

EFFECTS OF AMBIGUOUS FIGURE RECOGNIZED AS EITHER FACE OR NON-FACE STIMULUS ON ERP_S IN HUMAN SUBJECTS

作　　者：廖国锋[1] 沈政[1] 

机构地区：[1]北京大学心理学系和视觉听觉信息处理国家实验室,航天医学工程研究所100871

出　　处：《心理学报》1993年第3期271-276,共6页Acta Psychologica Sinica

摘　　要：用线条描绘的图形作为刺激材料,A为老鼠,C为老头,B为双关图(ambi-guous figure)。图形按两种顺序:A→B→C(Ⅰ)和C←B→A(Ⅱ)向被试呈现,每次呈现时间100ms。被试按刺激呈现方式分成两组,每组20人。被试接受图形的同时记录事件相关电位(ERPs),B图呈现后要求被试报告观察内容。对主观报告考验,发现双关图在Ⅰ呈现方式中作为非面孔刺激(老鼠)被认知,在Ⅱ呈现方式中作为面孔刺激(老头)被认知。ERPs分析表明,双关图作为面孔刺激被识别时,T_3、Pz的P_2波潜伏期比双关图作为非面孔刺激被识别时分别延长6.09ms和7.39ms,波幅没有显著差异;双关图作为面孔刺激时T_3、T_4、Pz和Oz的P_3波的潜伏期比双关图作为非面孔刺激时延长约15ms;波幅没有显著差异。Line-drawn figures were used as stimuli in this experiment, figure A in-dicated a rat, figure B was an ambiguous figure and figure C indicated anold man. According to two orders of presentation (A→B→C and C→B→A),these pictures were presented to the subjects. 40 subjects were divided into twoequal groups. ERPs were recorded while the subjects recepted the visual stimu-li. After the presentation of figure B, the subjects were asked to report thecontent of the picture. Analyzing the reports, it was found that the ambigu-ous figure was recognized as a rat in the first order of presentation whileit was recognized as an old man in the second order. The latencies of P2evoked by the ambiguous figure as face stimulus at T3 and Pz were longerthan those by the figure as non-face stimulus, and the latencies of P3 evokedby the ambiguous figure as face stimulus at T3、T4、Pz and Oz were longerthan those by the figure as non-face stimulus; there was no change in theamplitudes of P2 and P3.

关 键 词：双关图 面孔刺激 非面孔刺激 

分 类 号：B845.1[哲学宗教—心理学]