不同SOA条件下的情感启动效应研究

在150ms和250ms两种SOA条件下,以彩色图片为启动刺激,以汉语双字词为目标刺激,通过评价分类任务考察情感启动效应。结果表明在两种SOA条件下均存在显著的情感启动效应;积极启动和消极启动对目标词产生了不同的影响。类似Stroop效应的反应冲突机制可解释本研究所获得的结果。     

唤醒度对汉语情绪词情绪启动效应的影响

使用词汇情绪启动的实验范式,通过两个行为实验探讨了不同SOA(100ms、300ms和500ms)条件下情绪唤醒度在情绪启动效应中的作用,以及情绪启动效应是否受到任务形式的影响。结果发现,在情绪效价判断任务中,SOA为100ms时高唤醒和低唤醒启动词都出现了情绪启动效应,SOA为300ms时只有高唤醒启动词出现了情绪启动效应。在真假词判断任务中,无论高唤醒还是低唤醒启动词都没有出现情绪启动效应。唤醒度是影响词汇情绪启动效应的重要因素,但这种效应不是完全自动化的过程,会受到SOA和任务导向的影响。情绪启动效应可能来自于启动词与目标词在反应趋向上的一致性趋势。     

错误归因范式中情绪启动特点研究

归因错误在日常生活中是一种常见现象,本研究基于AMP范式,利用情绪启动刺激,通过两个实验探讨了阈上和阈下情绪启动特点.实验结果显示:(1)AMP范式下,存在阈上、阈下情绪启动效应;(2)AMP阈上启动时,汉语词、普通图片、面孔图片均有显著的情绪启动效应,即启动物的情绪色彩对中性目标物的评价有显著影响,被试有将中性模糊刺激赋予和启动物相同的情绪效价色彩的倾向;(3)阈上100ms、1500ms、5000ms三种SOA水平上,启动物效价作用均显著,说明AMP范式下,启动物效价作用能持续至少5s;(4)AMP阈下启动时,效价的简单效应仅在SOA为60ms时显著,即说明阈下情绪启动效应在较短的SOA内易出现,随着SOA的延长情绪启动效应衰退.     

阈上与阈下知觉启动之间的差异:来自Stroop效应的证据

本研究采用Oddball与Stroop相结合的范式,对导致Merikle与Daza等研究结果之间的矛盾进行了考察。研究发现,在启动刺激与目标刺激之问的SOA为300毫秒的即时掩蔽条件下,启动刺激“红”和“绿”对随后的目标刺激的判断产生了不同的影响。前者表现出典型的Stroop效应,后者表现出反转的Stroop效应;主观觉知阈限测验显示,启动刺激“红”是在阈下状态被知觉的,而启动刺激“绿”是在阈上状态被知觉的。结果表明．阈下知觉启动具有一定的时问延续性。并不局限在某一特定时问点上,启动刺激的知觉状态受多种因素影响。     

拖延刺激对注意偏向的影响及过程

研究是考察拖延个体对拖延相关信息的注意偏向及特点。实验1采用情绪Stroop范式,要求被试忽略刺激的语义,仅判断刺激的颜色。实验2采用修改后的点探测范式,以拖延词和中性词为线索,并操作线索和目标之间的时间间隔,被试的任务是判断目标刺激的位置。结果发现:高拖延的被试难以抵制拖延词的注意,在情绪Stroop任务中对拖延词的反应时间更长; 当拖延词和目标刺激的位置一致时,在短的线索—目标时间间隔(SOA)内,被试对目标刺激的反应时间更长,但当时间间隔长时,一致条件下的反应时更短。该研究表明,高拖延行为个体在有限的时间内难以抵制拖延信息的注意,对拖延刺激存在注意偏向。     

面孔-词Stroop范式中的情绪冲突效应研究

为探究面孔-词Stroop范式中的情绪冲突效应,本实验给被试呈现两种时长（150ms或1500ms）的刺激,令其分别完成对面孔-词Stroop范式中的“面孔任务”和“词任务”。结果发现：只有“面孔任务”中出现Stroop效应,产生情绪冲突,而在“词任务”中未出现Stroop效应;当呈现时间为150ms时,情绪词影响情绪面孔加工从而引发个体的情绪冲突,出现Stroop效应;当呈现时间为1500ms时,“面孔任务”中的Stroop效应消失。这提示了呈现时间是影响面孔-词Stroop范式中情绪冲突效应的一个重要因素。     

不同提示线索对于Stroop干扰效应的影响

本研究采用线索提示任务探讨了不同提示线索颜色、SOA及提示有效应对于经典Stroop干扰效应的影响。结果发现,线索提示类型及其颜色是否与目标色词一致会对Stroop任务产生显著影响。其中有效提示下出现显著Stroop效应,而无效提示下Stroop效应消失,显示视觉注意空间搜索会影响Stroop效应;线索提示颜色与色词颜色是否一致同样影响Stroop干扰效应,两者不一致时存在显著Stroop效应,而两者一致时Stroop效应消失,表明Stroop效应的发生依赖于色词加工中不同通道间信息的转译。 关键词：Stroop 效应;线索提示任务;转译理论     

纳西象形文字识别中的形、音、义激活

对纳西象形文字识别中的形、音、义激活进行了考察。实验1采用色词干扰的实验范式。结果表明,纳西象形文字的字形比字音和语义更易被激活。命名颜色字的形似字的颜色比命名颜色字的音同或音似字、语义联想字的颜色快。实验2采用色词干扰实验范式的变式。结果表明,当SOA=100ms时,颜色字及其形似字对颜色块命名的启动效应显著。当SOA为200ms和400ms时,颜色字的语义联想字对颜色块命名的启动效应显著。整个研究表明,在纳西象形文字识别中,字形信息首先被激活,其次是语义,字音的激活不明显。纳西象形文字的识别符合直通假设。所以如此,与纳西象形文字的特点有关     

时间间隔对面部表情唤醒度阈下情绪启动的影响

采用3×4混合实验设计,研究了启动刺激与靶刺激的时间间隔对面部表情唤醒度阈下情绪启动效应的影响,实验因素为启动刺激的唤醒度和时间间隔。结果发现,当时间间隔为200ms、300ms、500ms时,出现了阈下情绪启动效应,时间间隔为700ms时,启动效应消失。上述结果表明阈下情绪启动效应可在唤醒度维度上实现,但此效应只能在启动刺激与靶刺激间隔时间较短的情况下出现。     

中英文Stroop干扰效应的脑机制

以中国大学生为被试,采用事件相关电位对比研究中英文Stroop干扰效应的脑内时程动态变化。结果发现：两种文字材料都存在反应时的Stroop干扰效应,汉字的干扰效应明显强于英文;被试在完成不同文字材料的字词颜色命名任务时所诱发的ERP成分存在差异,具体为中文Stroop干扰效应表现为在350—550ms内,不一致条件比一致条件诱发一个更负的ERP成分（N450）,主要分布于额中部电极。英文Stroop干扰效应表现为不一致条件比一致条件在250—450ms内诱发一个更正的ERP成分（P300）,主要分布于左侧额顶叶;在450—550ms内诱发一个更负的ERP成分（N500）,主要分布于中后部。研究结果表明语言类型会影响Stroop干扰效应的脑内时程变化。     

Perception without awareness: further evidence from a Stroop priming task

In the present research, we examined the influence of prime-target stimulus onset asynchrony (SOA) on Stroop-priming effects from masked words. Participants indicated the color of a central target, which was preceded by a 33-msec prime word followed either immediately or after a variable delay by a pattern mask. The prime word was incongruent or congruent with the target color on 75% and 25% of the trials, respectively. The words followed by an immediate mask produced reliable Stroop interference at SOAs of 300 and 400 msec but not at SOAs of 500 and 700 msec. The words followed by a delayed mask produced a reversed (i.e., facilitatory) Stroop effect, which reached significance at an SOA of 400 msec or longer, but never at the shorter 300-msec SOA. Such an differential time course of both types of Stroop priming effects provides further evidence for the existence of qualitative differences between conscious and nonconscious perceptual processes.     

Impaired color word processing at an unattended location: Evidence from a Stroop task combined with inhibition of return

A Stroop task with separate color bar and color word stimuli was combined with an inhibition-of-return procedure to examine whether visual attention modulates color word processing. In Experiment 1, the color bar was presented at the cued location and the color word at the uncued location, or vice versa, with a 100- or 1,050-msec stimulus onset asynchrony (SOA) between cue and Stroop stimuli. In Experiment 2, on Stroop trials, the color bar was presented at a central fixated location and the color word at a cued or uncued location above or below the color bar. In both experiments, with a 100-msec SOA, the Stroop effect was numerically larger when the color word was displayed at the cued location than when it was displayed at the uncued location, but with the 1,050-msec SOA, this relation between Stroop effect magnitude and location was reversed. These results provide evidence that processing of the color word in the Stroop task is modulated by the location to which visual attention is directed.     

Color perception involves color representations firstly at a semantic level and then at a lexical level

Studies and models have suggested that color perception first involves access to semantic representations of color. This result leads to two questions: (1) is knowledge able to influence the perception of color when associated with a color? and (2) can the perception of color really involve only semantic representations? We developed an experiment where participants have to discriminate the color of a patch (yellow vs. green). The target patch is preceded either by a black-and-white line drawing or by a word representing a natural object associated with the same or a different color (banana vs. frog). We expected a priming effect for pictures because, with a 350-ms SOA, they only involve access to semantic representations of color, whereas words seem only elicit an access to lexical representations. As expected, we found a priming effect for pictures, but also for words. Moreover, we found a general slowdown of response times in the word-prime-condition suggesting the need of an additional processing step to produce priming. In a second experiment, we manipulated the SOA in order to preclude a semantic access in the word-prime-condition that could explain the additional step of processing. We also found a priming effect, suggesting that interaction with perception occurs at a lexical level and the additional step occurs at a color perception level. In the discussion, we develop a new model of color perception assuming that color perception involves access to semantic representations and then access to lexical representations.     

Semantic priming effects in a lexical decision task: comparing third graders and college students in two different stimulus onset asynchronies

Differences in the semantic priming effect comparing child and adult performance have been found by some studies. However, these differences are not well established, mostly because of the variety of methods used by researchers around the world. One of the main issues concerns the absence of semantic priming effects on children at stimulus onset asynchrony (SOA) smaller than 300ms. The aim of this study was to compare the semantic priming effect between third graders and college students at two different SOAs: 250ms and 500ms. Participants performed lexical decisions to targets which were preceded by semantic related or unrelated primes. Semantic priming effects were found at both SOAs in the third graders' group and in college students. Despite the fact that there was no difference between groups in the magnitude of semantic priming effects when SOA was 250ms, at the 500ms SOA their magnitude was bigger in children, corroborating previous studies. Hypotheses which could explain the presence of semantic priming effects in children's performance when SOA was 250ms are discussed, as well as hypotheses for the larger magnitude of semantic priming effects in children when SOA was 500ms.     

A sequential analysis of relevant and irrelevant information in the Stroop task

The effect of repeating relevant (colour) and irrelevant (word) stimulus information is investigated in two Stroop tasks. Thomas (1977) observed that the Stroop effect is reduced when the irrelevant word is repeated from trial n -1 to trial n. A similar effect was observed in the Simon task (Notebaert, Soetens, & Melis, 2001; Notebaert & Soetens, 2003a). MacLeod (1991) interprets this effect as sustained suppression and relates it to negative priming. In this paper we investigate whether the reduced Stroop effect for word repetitions is indeed related to the negative priming effect. In Experiment 1 with a response-stimulus interval (RSI) of 50 ms, the Stroop effect is not influenced by the sequence of the word and there is no negative priming effect. In Experiment 2 with an RSI of 200 ms, the Stroop effect is reduced for word repetitions but there is still no negative priming effect. This does not support the sustained-suppression hypothesis. The reduced Stroop effect for word repetitions is explained in terms of response priming.     

Comparison of affective and semantic priming in different SOA

Researchers have been at odds on whether affective or semantic priming is faster or stronger. The present study selects a series of facial expression photos and words, which have definite emotional meaning or gender meaning, to set up experiment including both affective and semantic priming. The intensity of emotion and gender information in the prime as well as the strength of emotional or semantic (in gender) relationship between the prime and the target is matched. Three groups of participants are employed separately in our experiment varied with stimulus onset asynchrony (SOA) as 50, 250 or 500 ms. The results show that the difference between two types of priming effect is revealed when the SOA is at 50 ms, in which the affective priming effect is presented when the prime has negative emotion. It indicates that SOA can affect the comparison between the affective and semantic priming, and the former takes the priority in the automatic processing level.     

Does the proportion of associatively related pairs modulate the associative priming effect at very brief stimulus-onset asynchronies?

A number of experiments have shown that the magnitude of the associative priming effect increases substantially when there is a high proportion of associatively related pairs in the list when the stimulus-onset asynchrony (SOA) between prime and target is long (more than 400 ms). In the present series of experiments we manipulated the proportion of associatively related pairs when the SOA was very brief (less than 200 ms). If processing of a target word is facilitated automatically by the prior presentation of a related prime, the occurrence of priming should be unaffected by the proportion of related pairs in the list. Experiment 1 showed a robust relatedness proportion effect obtained in a double lexical decision task. Experiments 2-4 used the masked priming technique at several very short SOAs (66, 116, and 166 ms) in lexical decision and naming. The results showed a reliable associative priming effect in the two tasks, which did not differ as a function of the proportion of related pairs. Finally, Experiment 5 used unmasked primes at an 83-ms SOA in which the primes remained in view after the target presentation. As in Experiments 2-4, the associative effect was not modulated by the proportion of associatively related pairs. The implications of these results are discussed.     

物理大小和面积的无意识空间表征

意识水平的研究发现,数字量的比较机制与物理刺激比较的机制是一样的;在无意识水平上的研究发现,数字加工存在无意识语义启动现象。我们假设,在数字的物理特性的比较任务中可能存在无意识启动效应和类SNARC效应。实验一的数字比较任务和数字的物理大小比较任务发现,在33毫秒的无意识启动条件下,数字语义比较任务和数字物理大小比较任务中都发现了类SNARC效应、启动效应以及Stroop效应。实验二的数字覆盖面积比较任务中发现,在33毫秒的启动水平,数字比较与数字覆盖面积的比较任务中均存在SNARC效应、Stroop效应和启动效应。     

汉字阅读中语音的通达与表征(Ⅰ)──字水平与亚字水平的语音及其交互作用

该文探讨了汉字语音激活的多层次性、普遍性、整字与声旁语音激活资源之间的交互作用等问题。以启动一命名为实验范式,结果表明：在汉字加工早期,汉字的语音得到了显著激活,而且这一激活发生在整字和声旁两个水平、高频和低频两种汉字中;整字与声旁的语音激活存在交互作用,而该交互作用受到整字与声旁的相对频率的影响。根据实验结果,该文提出：汉字整字和声旁的语音激活之间遵循“整字优先”和“高频优先”的原则交互作用。