重复启动对时序知觉的影响

在时序判断任务中,重复启动导致被试把启动的靶刺激知觉为先出现的。知觉加工增强观和决策反应偏向观都试图解释其机制,但仍存在争议。本研究采用图形材料,通过三个实验系统考察了重复启动对时序知觉的影响。实验结果显示,启动和指导语都具有显著效应。这说明,重复启动对时序知觉的影响涉及知觉加工和决策水平两个方面。实验还首次发现,在启动的靶刺激先出现时发生了重复启动效应的反转。最后,研究提出了双加工表征匹配调节假说,用以综合解释目前的研究结果     

SOA对Stroop启动效应的影响:行为和ERP研究

在Stroop启动范式中,启动刺激是灰色的色词,目标刺激是颜色块,被试的任务是命名颜色块的颜色。本研究通过行为实验和事件相关电位(ERP)实验的方法,研究SOA(Stimulus Onset Asynchrony)对Stroop启动效应的影响。当SOA为107ms时,在行为数据(反应时)和ERP数据(N300成分)上均表现出明显的启动效应;当SOA为1040ms时,行为上和ERP上的启动效应消失。该结果提示了在Stroop启动效应中,启动刺激对目标刺激的影响很可能是发生在对目标刺激的知觉加工晚期。     

面孔重复启动效应:知觉结构和语义表征的贡献

以30名大学生为被试,探讨了熟悉和陌生的正倒立面孔对重复启动效应的影响,以此考察知觉结构和语义表征对面孔重复启动的贡献.结果表明:(1)熟悉面孔的重复启动既存在知觉启动也存在语义启动,而不熟悉面孔仅仅存在知觉启动.(2)知觉结构和语义表征对启动效应的贡献是联合的,而不是分离的;在熟悉面孔中,语义表征对重复启动的贡献大于知觉结构的贡献.(3)知觉结构和语义表征对重复启动的贡献与加工阶段有关.知觉结构在初始阶段起作用,随后作用逐渐减弱;而语义表征存在于信息加工的整个过程.     

视觉搜索中的记忆

多个认知模型认为记忆在视觉搜索中有重要作用。该理论观点得到了返回抑制、启动效应和知觉学习等领域研究的支持。部分研究者对视觉搜索中记忆表征的性质和容量也进行了探讨。     

词汇加工初期语义属性的激活程度:来自ERP的证据

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,探讨汉语重复启动和语义相关启动中语义激活程度的差异和特点。实验中要求被试执行一个额外的语义判断任务,对关键刺激不做明显的行为反应。结果发现,在重复启动条件下获得了稳定的N400效应,语义相关启动条件下没有N400效应;重复启动和语义相关启动条件均未产生N250效应。在较短的SOA条件下,词频对语义的激活和加工不产生影响。     

视觉工作记忆负载类型对注意选择的影响

通过操纵Flanker任务相对于视觉工作记忆任务的呈现位置, 探讨在视觉工作记忆编码和保持阶段, 精度负载和容量负载对注意选择的影响。行为结果发现, Flanker任务呈现位置和视觉工作记忆负载类型影响注意选择; ERP结果发现, 在保持阶段, 当搜索目标和干扰项不一致时, 负载类型影响N2成分。研究表明, 在编码阶段, 视觉工作记忆负载主要通过占用更多知觉资源降低干扰效应, 支持知觉负载理论; 而在保持阶段, 当Flanker任务位于记忆项内部时, 两类负载在工作记忆表征过程中不同的神经活动导致投入到注意选择的认知控制资源不同, 可能是两类负载影响保持阶段注意选择的机制。     

阈下安全启动改善非安全依恋女性的注意加工

研究采用掩蔽启动范式，结合事件相关电位技术，考察阈下安全启动在非安全依恋女性对婴儿面孔注意加工上的改善效应。行为指标上，悲伤程度评分和反应时结果均表明了安全启动的改善作用。ERP结果上，在早期注意加工阶段，阈下安全启动比中性启动诱发了依恋焦虑和依恋回避女性对婴儿面孔表情更大的N1波幅以及更优的P2潜伏期，在晚期控制注意加工相关的P3波幅上同样发现了类似的改善效应。研究结果表明阈下安全启动能够提升非安全依恋女性对婴儿面孔的知觉敏感性，改善非安全依恋女性注意加工缺陷，且这种改善效应不仅仅作用于早期注意加工阶段而且还可以扩展到个体有意识的晚期控制加工阶段。     

具身知觉符号理论视角下的情绪启动效应

从知觉符号理论出发对情绪启动效应进行解读,启动刺激与目标刺激涉及的知觉符号相似性、框架相似性及模态激活延续性是情绪启动效应产生的可能机制和影响因素。在此基础上总结归纳出情绪启动的知觉符号匹配假说,并建构情绪启动效应认知加工模型,对现有情绪启动理论进行整合和拓展,以促进情绪启动刺激材料的拓展、提高研究生态效度; 促进情绪启动效应操作的有效性,进而提高其应用价值。情绪启动研究亦能反哺于知觉符号理论,促进其发展。     

知觉组织影响时序知觉的认知机制:ERP研究的证据

以往研究显示,知觉组织影响时序知觉,采用ERP技术拟探讨知觉组织影响时序知觉的认知机制。采集23名被试完成同时判断任务的脑电数据。行为结果发现,知觉组织影响时序知觉,具体表现为知觉组织条件的同时判断频率显著高于非知觉组织条件。ERPs结果发现,在P1和P2成分上,知觉组织条件与非知觉组织条件引发的波幅没有显著差异; 而在N1成分上,知觉组织条件诱发的N1波幅显著大于非知觉组织条件。这表明,知觉组织对时序知觉的影响可能发生在视觉刺激加工的早期阶段,视觉刺激的知觉组织先于时序信息加工。     

正常老化对视觉早期注意的影响——来自ERP的证据

选择性注意能够作用于视觉信息加工的不同阶段。各个注意阶段均受到老化过程的影响, 其中注意早期阶段的老化研究对于理解认知老化的发生机制有重要意义。本文系统地梳理了刺激前的注意预期阶段以及刺激后200 ms内的早期感知注意阶段的正常老年人和青年人ERP比较研究, 以探讨正常老化对视觉早期注意的影响。现有证据表明, 相对于青年人, 正常老年人：(1)多个早期ERP注意效应(包括注意预期ADAN, 早期空间注意N1, 以及特征注意SP和SN)在潜伏期上都存在显著延迟; (2)在振幅上, 不同ERP注意效应的老化表现存在差异：某些ERP成分(包括注意预期EDAN, 以及早期空间注意P1)的注意效应没有明显减弱, 而某些ERP成分(包括注意预期alpha, 早期空间注意N1, 以及特征注意SN)的注意效应受到老化调控; (3)一些注意效应(包括特征注意SP成分, 以及客体注意P1和N1成分)的目标增强机制保留, 而干扰抑制机制缺损。目前已有研究在老化对注意效应振幅的调控上还存在不一致, 这可能与研究的信噪比、任务难度、注意机制分离以及老年人的个体差异有关。未来研究应考虑这些因素以更好地探究正常老化对视觉早期注意的影响。     

Masked repetition priming hinders subsequent recollection but not familiarity: A behavioral and event-related potential study

The present study used the masked repetition priming paradigm in the study phase and the R/K paradigm in the test phase to investigate whether repetition priming can hinder recognition memory and which recognition process (familiarity or recollection) is hindered. Event-related potentials (ERPs) in the study and test phase were recorded to explore the temporal course of how repetition priming hinders subsequent recognition memory and which old/new effect (FN400 or LPC) is affected. Converging behavioral and ERP results indicated that masked repetition priming hindered subsequent recollection but not familiarity. The analysis of ERP priming effects in the study phase indicated that primed words were associated with less negative N400 and less positive LPC compared to unprimed words. The analysis of the priming effect as a function of subsequent memory revealed that only the LPC priming effect was predictive of priming effect on subsequent memory, which suggested that the “prediction-error” account might be a possible explanation of how repetition priming affects subsequent recognition memory.     

Repetition Priming Effects in Proficient Mandarin–Cantonese and Cantonese–Mandarin Bidialectals: An Event-Related Potential Study

The present study adopted a repetition priming paradigm to investigate the bidialectal (bilingual) representation of speakers with different native dialects by event-related potential (ERP) technique. Proficient Mandarin–Cantonese and Cantonese–Mandarin bidialectals participated in the study. They were required to judge whether a word was a biological word or not, when the words (target word) were represented under four types of repetition priming conditions: Mandarin (prime)–Mandarin (target), Mandarin (prime)–Cantonese (target), Cantonese (prime)–Cantonese (target) and Cantonese (prime)–Mandarin (target). Results of reaction time and accuracy primarily indicated larger repetition priming effects in Mandarin–Mandarin and Cantonese–Cantonese (within-language) conditions than that in Mandarin–Cantonese and Cantonese–Mandarin (between-language) conditions. But more importantly, P200 and N400 mean amplitudes revealed distinct repetition priming effects between two types of participants. Specifically, both P200 and N400 indicated that the repetition priming effect in Mandarin–Mandarin condition was larger than that in Cantonese–Cantonese condition for Mandarin–Cantonese participants, whereas it was opposite for Cantonese–Mandarin participants. In addition, P200 also suggested opposite patterns of repetition priming effects in between-language priming conditions for two groups of participants. The repetition priming effect in Mandarin–Cantonese condition was larger than that in Cantonese–Mandarin condition for Mandarin–Cantonese participants, while for Cantonese–Mandarin participants, it was opposite (Mandarin–Cantonese < Cantonese–Mandarin). The results implied a clear asymmetric representation of two dialects for proficient bidialectals. They were further discussed in light of native dialect and language use frequency.     

Event-related potential correlates of visual identity negative priming unbiased by trial-by-trial effects

Negative priming (NP) refers to slowed reaction times and/or less accurate responses in people responding to a target that was ignored on a previous trial. Although extensive research with behavioral measures has been conducted, little is known about the electrophysiological mechanisms underlying this effect. The few previous studies carried out have led to contradictory results, supporting either episodic-retrieval or inhibition-based theoretical perspectives. In this study, we analyzed the ERP correlates of negative priming by using an experimental global context which, similar to the NP standard context, included Attended repetition trials. In addition, we presented relevant stimuli in separate blocks instead of the more usual randomized design. The NP effect can be biased by strategies adopted by participants when attended and ignored repetition trials are presented randomly. Specifically, we observed an enhanced N2 when a distractor from the previous trial became the target in the next trial. It is supposed that this finding reflects the involvement of additional attentional resources in the selection of a previously inhibited distractor as the new target stimuli.     

FN400和N400是相同的ERP成分：来自图形材料的证据

本研究通过比较记忆编码阶段语义启动引起的N400效应和提取阶段熟悉性引起的FN400效应的地形图考察图形材料诱发的N400和FN400是否是相同的ERP成分。实验结果发现,语义启动引起的N400效应和熟悉性引起的FN400效应的地形图没有显著差异。这说明图形材料诱发的FN400和N400是相同的ERP成分,两者都反映了语义加工。本研究为FN400效应反映了语义启动而不是熟悉性的观点提供了新的实验证据。     

反应选项对时序知觉重复启动效应的影响

先前研究采用两项反应任务发现了时序知觉重复启动效应, 这可能是反应选项导致的虚假效应, 本研究采用三项反应任务对此进行了检验。实验1运用三项判断任务以消除缺乏中间选项所致的反应偏向, 结果发现重复启动显著影响“哪个图形先出现”和“两个图形同时出现”的时序判断; 实验2在实验1的基础上对“同时出现”反应选项进行两种指导语操作, 实验结果不仅与实验1一致, 而且“有把握时判断为同时出现”和“有无把握都判断为同时出现”之间没有显著差异, 说明被试能够识别时序加以判断, 不支持反应偏向的前提条件。因此, 时序知觉重复启动效应不是反应选项产生的反应偏向引发的虚假效应, 重复启动对“系列性”和“同时性”时序知觉都存在显著影响。     

Perceptual and conceptual sources of priming on a word generation task

Repetition of any number of cognitive processes can facilitate subsequent performance (i.e., repetition priming). In this study, we explored several candidate mechanisms that could account for repetition priming on a word generation task. In Experiment 1, we examined whether repetition of semantic processing is necessary for priming on this task. In Experiment 2, we examined whether repetition of semantic processing is sufficient for priming on this task. In both experiments, we additionally examined the effect of changing the specific nature of the semantic retrieval task (i.e., from visual to functional, and vice versa) on performance. The results from these experiments indicated that repetition of semantic processing is both necessary and sufficient to produce a facilitation effect on the word generation task. However, semantic processing of the same attribute does not need to be repeated for facilitation effects to occur. Implications of these findings for theories of the representation and retrieval of semantic knowledge are discussed.     

Hemispheric differences in the time-course of semantic priming processes: evidence from event-related potentials (ERPs)

To investigate hemispheric differences in the timing of word priming, the modulation of event-related potentials by semantic word relationships was examined in each cerebral hemisphere. Primes and targets, either categorically (silk-wool) or associatively (needle-sewing) related, were presented to the left or right visual field in a go/no-go lexical decision task. The results revealed significant reaction-time and physiological differences in both visual fields only for associatively related word pairs, but an electrophysiological difference also tended to reach significance for categorically related words when presented in the left visual field. ERP waveforms showed a different time-course of associative priming effects according to the field of presentation. In the right visual field/left hemisphere, both N400 and Late Positive Component (LPC/P600) were modulated by semantic relatedness, while only a late effect was present in the left visual field/ right hemisphere.