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Mechanisms underlying syntactic and semantic processing of Chinese simple sentences Evidence from event-related brain potentials
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作者 Huanhai Fang Ming Zhao 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第25期1937-1941,共5页
This study sought to test the processing of three types of sentences in Chinese, as correct sentences, semantic violation sentences, and sentences containing semantic and syntactic violations, based on the following s... This study sought to test the processing of three types of sentences in Chinese, as correct sentences, semantic violation sentences, and sentences containing semantic and syntactic violations, based on the following sentence pattern: "subject (noun) + yi/gang/zheng + predicate (verb)". Event-related potentials on the scalp were recorded using 32-channel electroencephalography. Compared with correct sentences, target words elicited an early left anterior negativity (N400) and a later positivity (P600) over frontal, central and temporal sites in sentences involving semantic violations. In addition, when sentences contained both semantic and syntactic violations, the target words elicited a greater N400 and P600 distributed in posterior brain areas. These results indicate that Chinese sentence comprehension involves covert grammar processes. 展开更多
关键词 CHINESE SYNTACTIC SEMANTIC event-related brain potentials processing mechanism
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Identification of a Novel Dynamic Red Blindness in Human by Event-related Brain Potentials
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作者 张佳华 孔维佳 杨仲乐 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2010年第6期786-791,共6页
Dynamic color is an important carrier that takes information in some special occupations.However,up to the present,there are no available and objective tests to evaluate dynamic color processing.To investigate the cha... Dynamic color is an important carrier that takes information in some special occupations.However,up to the present,there are no available and objective tests to evaluate dynamic color processing.To investigate the characteristics of dynamic color processing,we adopted two patterns of visual stimulus called "onset-offset" which reflected static color stimuli and "sustained moving" without abrupt mode which reflected dynamic color stimuli to evoke event-related brain potentials (ERPs) in primary color amblyopia patients (abnormal group) and subjects with normal color recognition ability (normal group).ERPs were recorded by Neuroscan system.The results showed that in the normal group,ERPs in response to the dynamic red stimulus showed frontal positive amplitudes with a latency of about 180 ms,a negative peak at about 240 ms and a peak latency of the late positive potential (LPP) in a time window between 290 and 580 ms.In the abnormal group,ERPs in response to the dynamic red stimulus were fully lost and characterized by vanished amplitudes between 0 and 800 ms.No significant difference was noted in ERPs in response to the dynamic green and blue stimulus between the two groups (P】0.05).ERPs of the two groups in response to the static red,green and blue stimulus were not much different,showing a transient negative peak at about 170 ms and a peak latency of LPP in a time window between 350 and 650 ms.Our results first revealed that some subjects who were not identified as color blindness under static color recognition could not completely apperceive a sort of dynamic red stimulus by ERPs,which was called "dynamic red blindness".Furthermore,these results also indicated that low-frequency ERPs induced by "sustained moving" may be a good and new method to test dynamic color perception competence. 展开更多
关键词 dynamic color BLINDNESS event-related brain potentials
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Icon memory research under different time pressures and icon quantities based on event-related potential 被引量:5
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作者 牛亚峰 薛澄岐 +3 位作者 李雪松 李晶 王海燕 金涛 《Journal of Southeast University(English Edition)》 EI CAS 2014年第1期45-50,共6页
In order to obtain related brain electrical components and neural bases of physiology assessment of icon elements in a digital human-computer interface the modified sample-delay matching task experimental paradigm is ... In order to obtain related brain electrical components and neural bases of physiology assessment of icon elements in a digital human-computer interface the modified sample-delay matching task experimental paradigm is used under different time pressures 4 000 and 2 000 ms and different icon quantities three five and ten icons on icon memory based on event-related potential ERP technology.Experimental results demonstrate that P300 has significant volatility changes and the maximum amplitude around the middle line of the parietal area PZ and P200 has obvious volatility changes around the middle line of the frontal and central area FCZ during icon cognition.P300 and P200 amplitudes increase as tasks become more difficult.Thus P300 latency is positively correlated with task difficulty. ERP research on the characteristics of icon memory will be an important reference standard in guiding user neurocognitive behavior and physiology assessment on interface usability. 展开更多
关键词 time pressure icon quantity event-related potential erp
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Differential cognitive responses to guqin music and piano music in Chinese subjects: an event-related potential study 被引量:9
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作者 Wei-Na ZHU Jun-Jun ZHANG +3 位作者 Hai-Wei LIU Xiao-Jun DING Yuan-Ye MA Chang-Le ZHOU 《Neuroscience Bulletin》 SCIE CAS CSCD 2008年第1期21-28,共8页
Objective To compare the cognitive effects of guqin (the oldest Chinese instrument) music and piano music. Methods Behavioral and event-related potential (ERP) data in a standard two-stimulus auditory oddball task... Objective To compare the cognitive effects of guqin (the oldest Chinese instrument) music and piano music. Methods Behavioral and event-related potential (ERP) data in a standard two-stimulus auditory oddball task were recorded and analyzed. Results This study replicated the previous results of culture-familiar music effect on Chinese subjects: the greater P300 amplitude in frontal areas in a culture-familiar music environment. At the same time, the difference between guqin music and piano music was observed in NI and later positive complex (LPC: including P300 and P500): a relatively higher participation of right anterior-temporal areas in Chinese subjects. Conclusion The results suggest that the special features of ERP responses to guqin music are the outcome of Chinese tonal language environments given the similarity between Guqin's tones and Mandarin lexical tones. 展开更多
关键词 music GUQIN PIANO cognitive process event-related potential erp NI LPC P300
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Effect of Neurofeedback on Visual-Spatial Attention in Male Children with Reading Disabilities: An Event-Related Potential Study
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作者 Neda Sadeghi Mohammad Ali Nazari 《Neuroscience & Medicine》 2015年第2期71-79,共9页
Recent studies describe a number of difficulties associated with attention deficit in children with reading disabilities. Information about visual-spatial attention mainly arises from studies using event-related poten... Recent studies describe a number of difficulties associated with attention deficit in children with reading disabilities. Information about visual-spatial attention mainly arises from studies using event-related potentials (ERPs) during Posner’s spatial cueing paradigm. This study aims to use neurofeedback with a special protocol for treating children with reading disabilities, and moreo-ver, to evaluate visual-spatial attention ability by means of Posner paradigm task and ERPs. The study was conducted in a single subject design in 20 sessions. Participants were 2 male children, aged between 10 - 12 years old, who completed twelve 30-min neurofeedback sessions. Repeated measurements were performed during the baseline, treatment, and post treatment phases. Results showed some improvement in Posner paradigm parameters (correct response, valid and invalid reaction times). Furthermore, grand average ERPs for both of the participants in each of the four conditions (Valid-right, Invalid-right, Valid-left and Invalid-left) were analyzed. The analysis of P3 component showed a reduction in latency, indicating an improvement in the timing of cognitive processes. In addition, the graphs showed a decrease in amplitude level, which meant easier processing than before. 展开更多
关键词 NEUROFEEDBACK READING DISABILITY Visual-Spatial Attention erp event-related potentials
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基于ERP信号的目标检测研究综述
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作者 杨倩倩 王伟 《生物医学工程学进展》 CAS 2024年第2期111-122,共12页
目标检测是一个广泛应用于多个领域的研究课题。传统的计算机视觉方法存在复杂度高、泛化能力差、模型对象可迁移性差等缺点,而人脑在目标检测方面具有较强的认知能力和感知能力,仅需要很少的训练样本就可以达到较好的检测效果。基于事... 目标检测是一个广泛应用于多个领域的研究课题。传统的计算机视觉方法存在复杂度高、泛化能力差、模型对象可迁移性差等缺点,而人脑在目标检测方面具有较强的认知能力和感知能力,仅需要很少的训练样本就可以达到较好的检测效果。基于事件相关电位(Event-Related Potentials,ERP)的脑机接口(Brain-Computer Interface,BCI)是一种全新的提升目标检测性能的方法,它能够将脑内信息与外部环境进行交互。在此基础上,Gerson提出了一种以脑电信号为基础的快速串行视觉呈现(Rapid Serial Visual Presentation,RSVP)范式,包括显示方式、有效视觉范围、目标复杂度、刺激频率和持续时长等。该文还对ERP信号的预处理、特征提取及分类等方法进行了综述,并对该领域的局限性和发展趋势进行了探讨。 展开更多
关键词 事件相关电位 脑机接口 快速串行视觉呈现 目标检测 特征提取
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任务目的对自动语义激活过程的调节作用:ERPs研究 被引量:3
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作者 宋娟 吕勇 沈德立 《心理学探新》 CSSCI 2013年第2期134-140,共7页
此研究采用ERPs技术,中文词汇为刺激,利用掩蔽启动范式,探讨了自上而下的任务因素对自动语义激活过程是否具有调节作用。实验任务有三个:指示被试对问号后出现的词进行生物/非生物的词汇分类判断;指示被试对圆圈后出现的词进行是否含上... 此研究采用ERPs技术,中文词汇为刺激,利用掩蔽启动范式,探讨了自上而下的任务因素对自动语义激活过程是否具有调节作用。实验任务有三个:指示被试对问号后出现的词进行生物/非生物的词汇分类判断;指示被试对圆圈后出现的词进行是否含上下结构的字的词汇结构判断;对带"*"的词进行真词/假词判断。研究发现:当指示随后将进行词汇分类判断任务时,被试对被掩蔽的启动刺激产生语义加工期待,从而被掩蔽的启动刺激的加工达到深层次语义水平,被掩蔽的启动刺激对靶刺激产生显著的启动效应。当指示对启动刺激进行词汇结构判断时,无显著的启动效应。自上而下的任务因素对自动语义激活过程具有调节作用。 展开更多
关键词 任务目的 自上而下的调节 自动语义激活 事件相关电位 脑机制
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头低位模拟失重对听觉ERPs早成分的影响 被引量:1
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作者 赵仑 魏金河 +1 位作者 任维 姜洋 《航天医学与医学工程》 CAS CSCD 北大核心 2001年第6期395-399,共5页
目的观察头低位模拟失重对听觉事件关联电位 (ERPs)早成分的影响 ,进一步了解模拟失重条件下脑功能的变化特点。方法被试者为 1 4名右利手正常在校大学生 (2 0~ 2 3岁 )。以头低位倾斜 (- 1 0°,HDT)模拟失重 ,头高位倾斜 (+1 0... 目的观察头低位模拟失重对听觉事件关联电位 (ERPs)早成分的影响 ,进一步了解模拟失重条件下脑功能的变化特点。方法被试者为 1 4名右利手正常在校大学生 (2 0~ 2 3岁 )。以头低位倾斜 (- 1 0°,HDT)模拟失重 ,头高位倾斜 (+1 0°,HUT)为对照。要求被试者对 4个方位的声音信号进行音调选择方位区分反应 (SR)。在不同体位记录 4套SR作业的ERPs。对 -t和方差分析统计听觉ERPs早成分。结果与HUT相比 ,HDT条件下靶信号 (T)ERPs和非靶信号 (NT)ERPs早成分的平均幅值在第 4套作业时均显著降低 ,且以F5区受影响最大 ,并表现出一定的方位特征。结论HDT对听觉ERPs早成分有一定的抑制性影响 ,提示HDT下脑的警觉激活程度降低。 展开更多
关键词 失重模拟 听觉 事件关联电位 脑功能
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The Objective Assessment of Event-Related Potentials:An Influence of Chronic Pain on ERP Parameters
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作者 Maksim Zhuravlev Mikhail Novikov +2 位作者 Ruzanna Parsamyan Anton Selskii Anastasiya Runnova 《Neuroscience Bulletin》 SCIE CAS CSCD 2023年第7期1105-1116,共12页
The article presents an original method for the automatic assessment of the quality of event-related potentials(ERPs),based on the calculation of the coefficientε,which describes the compliance of recorded ERPs with ... The article presents an original method for the automatic assessment of the quality of event-related potentials(ERPs),based on the calculation of the coefficientε,which describes the compliance of recorded ERPs with some statistically significant parameters.This method was used to analyze the neuropsychological EEG monitoring of patients suffering from migraines.The frequency of migraine attacks was correlated with the spatial distribution of the coefficientsε,calculated for EEG channels.More than 15 migraine attacks per month was accompanied by an increase in calculated values in the occipital region.Patients with infrequent migraines exhibited maximum quality in the frontal areas.The automatic analysis of spatial maps of the coefficientεdemonstrated a statistically significant difference between the two analyzed groups with different means of migraine attack numbers per month. 展开更多
关键词 event-related potential Chronic migraine erp quality Automatic evaluation
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Processing of global and local properties——An analysis with event-related brain potentials 被引量:5
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作者 韩世辉 陈霖 《Science China(Life Sciences)》 SCIE CAS 1996年第2期179-188,共10页
The different processing of global and local properties of compound visual stimuli was studied with event-related brain potentials (ERPs) in the present experiment. It was found that, compared with the identification ... The different processing of global and local properties of compound visual stimuli was studied with event-related brain potentials (ERPs) in the present experiment. It was found that, compared with the identification of global properties, the discrimination of local properties elicited longer RTs, lower accuracies, increased amplitudes of P1, decreased amplitudes of N1, and longer latencies of N2 and P3. The conflict of global and local properties increased the amplitudes of P2, decreased the amplitudes of P3, and prolonged latencies of N2 and P3. These results indicated that the advantage of global processing occurs at an early perceptual stage, and the attentional mechanisms for global and local processing may be different. 展开更多
关键词 event-related brain potentials GLOBAL PROPERTY LOCAL PROPERTY attention visual perception.
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条件推理中否定前件下信念偏差发生阶段的ERP研究 被引量:3
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作者 顾本柏 罗俊龙 +2 位作者 贾磊 索涛 张庆林 《心理科学》 CSSCI CSCD 北大核心 2012年第3期563-568,共6页
以日常生活中的条件推理语句为实验材料,采用大、小前提和结论依次呈现的"推断-判断"范式,利用事件相关电位(event-related brain potential,ERP)技术探讨了条件推理中否定前件下信念偏差效应的脑内时程动态变化。结果发现:... 以日常生活中的条件推理语句为实验材料,采用大、小前提和结论依次呈现的"推断-判断"范式,利用事件相关电位(event-related brain potential,ERP)技术探讨了条件推理中否定前件下信念偏差效应的脑内时程动态变化。结果发现:在行为反应上,较信念促进,信念阻碍下的正确率更低反应时更长;在脑电上,两条件(信念阻碍和信念促进)诱发的ERP波形仅在大前提加工阶段出现明显的分离。这表明该推理下的信念偏差效应可能早在对大前提的语义表征阶段就已发生。 展开更多
关键词 条件推理 信念偏差 事件相关电位 晚正成分
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精神分裂症患者心理旋转的ERP脑地形图研究 被引量:6
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作者 陈玖 杨来启 +5 位作者 吴兴曲 马文涛 张彦 邓自和 刘光雄 贾婷 《精神医学杂志》 2012年第1期21-24,共4页
目的探讨精神分裂症患者心理旋转的事件相关电位脑地形图的变化。方法对33例精神分裂症患者(精神分裂症组)和30例正常健康人(对照组)进行心理旋转任务的ERP测定。对其脑地形图分布的变化进行对照观察。结果 (1)精神分裂症组较对照组错... 目的探讨精神分裂症患者心理旋转的事件相关电位脑地形图的变化。方法对33例精神分裂症患者(精神分裂症组)和30例正常健康人(对照组)进行心理旋转任务的ERP测定。对其脑地形图分布的变化进行对照观察。结果 (1)精神分裂症组较对照组错误率显著性增高,反应时显著性减少(P<0.05);(2)精神分裂症组较对照组正镜像波幅显著性降低(P<0.05);精神分裂症组只有右顶-枕叶区域被激活,兴奋性降低,面积变小,而镜像更低、更小;在0~200 ms精神分裂症组顶叶出现一个兴奋性更高、面积更大的负成分;两组正镜像顶-枕叶右边兴奋性都高于左边。结论 (1)精神分裂症患者心理旋转能力受损,镜像严重受损,且心理旋转的正镜像加工机制可能不同,提示正镜像加工能力可以相互转化。(2)心理旋转存在一个反应准备负电位和右脑优势半球,精神分裂症患者反应准备时需要消耗更多心理资源。揭示心理旋转能力受损的脑地形图可作为诊断精神分裂症的辅助指标。 展开更多
关键词 精神分裂症 心理旋转 erp脑地形图 优势半球反应准备电位
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基于Farwell范式诱发ERP的身份识别研究 被引量:4
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作者 刘晶 白艳茹 +5 位作者 许敏鹏 殷涛 何峰 周鹏 綦宏志 明东 《电子测量与仪器学报》 CSCD 北大核心 2015年第2期221-226,共6页
人体脑电特征作为一种新型的生物识别特征正受到越来越多的关注,但事件相关电位是否可用于身份识别尚未得到充分论证。本研究采集了含有55名被试者的较大数据集,对Farwell范式诱发的事件相关电位的个体间差异性与个体内一致性进行分析,... 人体脑电特征作为一种新型的生物识别特征正受到越来越多的关注,但事件相关电位是否可用于身份识别尚未得到充分论证。本研究采集了含有55名被试者的较大数据集,对Farwell范式诱发的事件相关电位的个体间差异性与个体内一致性进行分析,进而提取ERP波形特征,利用支持向量机进行身份识别。结果显示靶刺激诱发的ERP特征对55位被试的身份识别正确率可达到96.36%,而非靶刺激诱发的ERP特征识别率可达到98.18%。本研究证实了Farwell范式诱发的事件相关电位可以作为一种新型的生物识别特征,在身份识别或认证等领域具有良好的应用潜力。 展开更多
关键词 事件相关电位 身份识别 脑-机接口 Farwell范式 支持向量机
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词汇识别中语音激活的时间进程及作用:来自ERP的证据 被引量:3
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作者 侯友 白学军 《内蒙古师范大学学报(自然科学汉文版)》 CAS 北大核心 2012年第1期51-57,共7页
运用事件相关脑电位(ERP)技术,采用快速掩蔽启动范式和Go/Nogo范式,探讨汉语词汇识别过程中语音激活的时间进程和语音信息对词汇加工的影响作用.结果发现,在词汇加工的早期阶段,语音对正字法的加工没有显著影响,正字法加工诱发了明显的N... 运用事件相关脑电位(ERP)技术,采用快速掩蔽启动范式和Go/Nogo范式,探讨汉语词汇识别过程中语音激活的时间进程和语音信息对词汇加工的影响作用.结果发现,在词汇加工的早期阶段,语音对正字法的加工没有显著影响,正字法加工诱发了明显的N250成分;语音信息的激活发生在语义信息激活之前,语音信息促进了语义信息的加工. 展开更多
关键词 词汇识别 语音启动 事件相关脑电位(erp)
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语义距离半球效应的ERP研究 被引量:2
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作者 吕勇 魏景汉 《心理学探新》 CSSCI 北大核心 2005年第3期33-39,共7页
以通过视觉通路呈现的汉语双字词为实验材料,操纵启动词与目标词的语义距离,在词汇决定实验中记录ERP,发现:(1)除N300外,P240亦对语义距离敏感,它可能是一种与语义加工有关的新的ERP成分;(2)P240在头皮中央偏左的部位较早出现,但在头皮... 以通过视觉通路呈现的汉语双字词为实验材料,操纵启动词与目标词的语义距离,在词汇决定实验中记录ERP,发现:(1)除N300外,P240亦对语义距离敏感,它可能是一种与语义加工有关的新的ERP成分;(2)P240在头皮中央偏左的部位较早出现,但在头皮右侧波幅较大;(3)N300和P240都不存在语义距离的半球效应,该结果没有证实右脑更专擅远距离语义加工的假设,表明使用汉语与使用拼音文字的脑机制存在差异。 展开更多
关键词 大脑半球 事件相关电位(erps) P240 N300
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基于IR-ERP的脑-机接口的结构与原理 被引量:4
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作者 谢勤岚 杨仲乐 《武汉理工大学学报(交通科学与工程版)》 北大核心 2003年第3期318-321,共4页
提出了一种基于模拟阅读事件相关电位的脑 -计算机接口 (IR-ERP-BCI) .该 BCI主要由三部分构成 :带有 36个键的虚拟键盘 ,EEG数据采集单元 ,数据处理和目标字符识别单元 .虚拟键盘上 ,每个键的上半部是代表该键名称的字符 ,下半部是一... 提出了一种基于模拟阅读事件相关电位的脑 -计算机接口 (IR-ERP-BCI) .该 BCI主要由三部分构成 :带有 36个键的虚拟键盘 ,EEG数据采集单元 ,数据处理和目标字符识别单元 .虚拟键盘上 ,每个键的上半部是代表该键名称的字符 ,下半部是一个小窗口 .运行时 ,每个窗口中都有两个标记伴随着符号句按一定时间间隔从右向左平移通过 .当使用者在辨识出目标键的一对指定标记时 ,就会产生一对与这对标记锁时的 ERP成分 .用户的目标键由这对成分的潜伏期以及它们之间的时间间隔来确定 .这种 IR-ERP-BCI消除了容易使人疲惫的突现刺激 ,并极大地抑制了 ERP中突现刺激诱发的外源性的和内源性的脑噪声 .6个被试参加了实验 ,平均传输率达到 87b/ min,视野字符密度高 ,键的大小和间距缩小到 1 .2 cm和 0 .3cm. 展开更多
关键词 脑—计算机接口(脑—机接口) 模拟阅读诱发电位 视野字符密度 传输率
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汉字识别的时间进程:来自字谜任务的ERP证据 被引量:1
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作者 罗俊龙 李文福 张庆林 《心理与行为研究》 CSSCI 2013年第1期43-48,共6页
通过"学习-测试-判断"的三阶段实验范型,采用事件相关电位(ERP)技术探讨了猜谜任务中对谜底答案(单个汉字)识别的脑内时程动态变化。结果发现:语义识别与字形识别下,汉字刺激均诱发了明显的N1、P2和N2成分,其中语义识别下的P... 通过"学习-测试-判断"的三阶段实验范型,采用事件相关电位(ERP)技术探讨了猜谜任务中对谜底答案(单个汉字)识别的脑内时程动态变化。结果发现:语义识别与字形识别下,汉字刺激均诱发了明显的N1、P2和N2成分,其中语义识别下的P2波幅表现为更加正性,可能与汉字语义的早期加工有关;随后,300-400ms内,语义识别比字形识别诱发了一个更加正性的ERP成分,该成分可能属于P300成分,反映了对汉字语义的进一步整合加工;最后,500-600ms内,语义识别比字形识别同样诱发了一个更加正性的ERP成分,可能反映了对汉字在语义上的最终确认。 展开更多
关键词 汉字识别 猜谜任务 事件相关电位
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Processing Relative Clauses in Chinese:Evidence from Event-Related Potentials 被引量:2
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作者 孙晓霞 Roeland HANCOCK +3 位作者 Thomas G.BEVER 成晓光 Luder SCHMIDT Uwe SEIFERT 《Chinese Journal of Applied Linguistics》 2016年第1期92-114,133,共24页
The interpretation of Chinese relative clauses has become of significant interest in sentence processing research, since some studies found that Chinese comprehension patterns violate the well-known universal subject ... The interpretation of Chinese relative clauses has become of significant interest in sentence processing research, since some studies found that Chinese comprehension patterns violate the well-known universal subject relatives preference proposed by NAPH theory and proved by cross-linguistic studies. The current study uses the neuropsychological measure of ERP. It supports such a language-specific phenomenon, with the results showing that both subject- and object- modifying subject relatives eliciting larger ERP components than object relatives. The results suggest that object relatives are easier to process than subject relatives at both modifying positions, challenging the claim of universal subject preference for all languages. In addition, this study casts doubts on CWO and working memory-based DLT models despite results being compatible with them, and concludes that none of the current models are comprehensive enough to account for the data. Finally, this study offers a piece of evidence for the garden path effect caused by the surface NVN word order in the Chinese relative clause. All in all, this study adds to the evidence that processing preference is not universal. It contributes to a comprehensive model of how complex structures are processed. 展开更多
关键词 relative clause universal subject relative preference event-related potentials(erps)
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返回抑制的早期ERP效应
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作者 王丽丽 邱江 +2 位作者 郭亚桥 徐莹 张庆林 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第12期164-167,共4页
采用事件相关电位(ERP)技术探讨辨别任务中返回抑制的脑内时程变化.结果发现:与非线索化条件相比,线索化条件下,P1波幅没有变化,N1波幅明显减小.结果表明,N1波幅变化可能与辨别任务有关,而且返回抑制至少在一定程度上来源于与反应相关... 采用事件相关电位(ERP)技术探讨辨别任务中返回抑制的脑内时程变化.结果发现:与非线索化条件相比,线索化条件下,P1波幅没有变化,N1波幅明显减小.结果表明,N1波幅变化可能与辨别任务有关,而且返回抑制至少在一定程度上来源于与反应相关的抑制,支持返回抑制的反应抑制说. 展开更多
关键词 返回抑制 事件相关电位 早期感知觉成分(P1 N1)
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在数字stroop范式中中文数字的物理信息和数字信息之间的ERP时程交互作用(英文)
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作者 位东涛 余彩云 邱江 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2010年第4期168-172,共5页
采用事件相关电位(ERP)技术探讨了在数字stroop范式中中文数字的物理信息和数字信息的交互作用电生理基础.结果发现,在任务出现后的250ms左右,在数字大小判断任务和物理大小判断任务中,不一致条件(数字大小与物理大小不一致)比一致条件... 采用事件相关电位(ERP)技术探讨了在数字stroop范式中中文数字的物理信息和数字信息的交互作用电生理基础.结果发现,在任务出现后的250ms左右,在数字大小判断任务和物理大小判断任务中,不一致条件(数字大小与物理大小不一致)比一致条件(数字大小与物理大小一致)诱发的ERP有一个更加负向的偏移(N250);随后,在300~450ms内,在数字大小判断任务和物理大小判断任务中,在大脑头皮顶部诱发明显的P300,且一致7条件比不一致条件诱发的P300更正.因此我们的研究表明中文数字的物理信息和数字信息的冲突主要发生在比较阶段. 展开更多
关键词 数字stroop范式 大小一致效应 事件相关电位
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