背景颜色对一致性序列效应的调节

为满足迅速变化的环境要求,个体需要快速灵活地调整认知加工策略。背景颜色是一个重要的环境因素,它能够影响人的认知和行为表现。然而,背景颜色对认知控制在线调整的影响,是一个关键但又被忽略的问题。为解决这个问题,本研究采用字母flanker任务,考察了灰色、蓝色和红色背景条件下的一致性序列效应。结果发现,蓝色背景下的一致性序列效应不显著,而灰色和红色背景下得到了显著的一致性序列效应;此外,在这三种颜色背景下,flanker干扰效应无显著差异。这些结果说明,蓝色背景影响一致性序列效应,但干扰效应不受背景颜色的调节。当前的研究首次揭示了背景颜色对认知控制在线调整的影响,也进一步加深了我们对一致性序列效应的理解。     

6～12岁儿童Flanker任务下的冲突适应效应

为了探讨6～12岁儿童冲突适应能力的发展,本研究使用经典的Flanker任务,考察了181名一至六年级小学生在冲突任务中的成绩。结果发现,冲突效应在各个年龄段都显著,但是冲突效应大小在不同年龄段之间没有显著差异;对于冲突适应效应,在反应时和准确率上都发现了冲突适应的证据,表现为不一致试次后的冲突效应减小和错误率降低,并且,冲突适应效应的大小在各个年龄段也没有差异。以上结果表明,对于6～12岁左右的小学生,冲突适应效应已经稳定存在,并且,不存在年龄差异。     

Stroop色词干扰效应与大脑两半球言语功能的不对称性

本实验旨在探讨中国人大脑两半球言语功能一侧化特征。实验测量指标为相对反应时和错误率。实验一结果表明:1.左半球对颜色反应占优势,故在实验中选用相对反应时;2.左半球的言语功能占优势。实验二将被试分为速度组与准确组,结果支持上述结果。     

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。     

微表情的启动效应研究

采用偏好判断和真伪判断任务,通过两个实验探讨微表情作为启动刺激时是否会影响观察者的偏好判断和真伪判断.结果发现:负性微表情(愤怒微表情和悲伤微表情)既影响观察者的偏好判断,也影响观察者的真伪判断,而正性微表情(高兴微表情)仅影响观察者的偏好判断,而不影响观察者的真伪判断;在三种微表情作为启动刺激的条件下,阈上呈现比阈下呈现产生更强的启动效应;仅在愤怒微表情条件下,女性比男性观察者表现出更强的偏好判断,而在其他条件下,均未出现性别差异.由此可见,微表情的启动效应既有与情绪启动效应的相似之处,也有其独特之处.     

材料类型和颜色典型性影响颜色-物体Stroop效应

通过两个实验考查材料类型和颜色典型性对颜色-物体Stroop效应的影响。实验1,考查颜色-物体（图片）Stroop效应。结果颜色典型性差异显著,命名图片的颜色和图片的名称都产生显著的颜色-物体Stroop效应。实验2,考查颜色-物体（词语）Stroop效应。结果颜色典型性差异显著,命名词语的颜色产生颜色-物体Stroop效应,命名词语的名称未产生颜色-物体Stroop效应。结论,材料类型和颜色典型性影响颜色-物体Stroop效应。     

青少年Stroop效应和反转Stroop效应的脑事件相关电位研究

研究了初中生、高中生和大学生在完成Stroop任务时的脑事件相关电位特征。以中文Stroop色字为材料,对颜色和字义任务中一致刺激和不一致刺激的脑电叠加平均,并相减(不一致刺激减一致刺激)得到差异波,比较各组被试的波形。结果发现:在顶区,初中生的P3比高中生和大学生更为正走向;大学生、高中生和初中生的头皮分布呈现出不同的特征;Nd4与Stroop效应和反转的Stroop效应有关,可能反映了对无关信息的抑制,而Pd6则反映了对语义信息的再加工。     

绝对重要性和认知负荷影响基于事件的前瞻记忆

操作前瞻记忆任务的重要性的方式有两种,研究发现相对重要性会造成进行中任务的损耗,而绝对重要性的研究较少且结果不尽一致,这种差异可能与进行中任务占用认知资源的情况有关。我们使用绝对重要性的指导语来操纵前瞻记忆任务的重要性高或者低,并且以Stroop任务作为进行中任务,来考察绝对重要性和认知资源占用的交互影响。结果发现,在进行中任务一致条件下,绝对重要性的增高促进了进行中任务的完成;而不一致条件下,则会阻碍进行中任务的完成。这说明,进行中任务的认知资源变化与前瞻记忆任务重要性对进行中任务的影响有着交互调节作用。     

高低创伤个体的Stroop干扰效应及性别差异研究

探讨高低创伤个体的认知干扰效应及性别差异。采用创伤事件终身经历问卷—学生版、PTSD检查表平时版来选取高低创伤被试,通过经典Stroop范式要求被试进行色—词辨别反应任务。结果显示：高低创伤被试间存在显著的差异,高创伤被试的反应时显著长于低创伤被试的反应时;高低创伤两组被试在任务类型上均存在显著差异,一致任务的反应时显著低于不一致任务的反应时;高创伤组被试在性别上存在显著差异,男性的反应时显著低于女性的反应时;创伤水平、性别与任务类型在Stroop效应干扰上存在交互作用。研究表明高创伤女性被试更容易受到认知干扰,Stroop任务的类型也对创伤被试产生一定作用。     

大学生不同负性情绪中的情绪一致性效应

分别诱导被试在悲伤、愤怒、中性三种情绪下对相应的三种词语进行学习再认,采用学习再认的实验程序,以再认正确率和反应时作为指标,运用信号检测论进行分析,主要考察情绪一致性在不同负性情绪中的表现,在悲伤和愤怒情绪之间证实了情绪一致性记忆效应。     

Studying the role of cognitive control in reasoning: evidence for the congruency sequence effect in the ratio-bias task

In this study, we investigated whether control of the conflict between incongruent heuristic and analytical answer options in a reasoning task is modulated by the presence of conflict on previous trials. In two experiments, we found that the incongruency of the previous trial has a significant effect on the control exhibited on the current trial. Our data also showed that this adaptation effect is modulated by the incongruency of the previous series of trials. These results demonstrate the same control adaptation effects for a reasoning task as observed for standard response interference tasks. Coinciding control effects in the two research areas suggest that cognitive control might be an important mechanism underlying performance on reasoning tasks. Based on these results we argue that the study of cognitive control in reasoning could potentially facilitate the refinement of empirical predictions and provide a new tool to explore the exertion of top-down control in human thinking.     

Error-related electrocortical responses in 10-year-old children and young adults

Recent anatomical and electrophysiological evidence suggests that the anterior cingulate cortex (ACC) is relatively late to mature. This brain region appears to be critical for monitoring, evaluating, and adjusting ongoing behaviors. This monitoring elicits characteristic ERP components including the error-related negativity (ERN), error positivity (Pe) and correct-related negativity (CRN), with the ERN clearly relating to activation of the ACC; however, little attention has been paid to the examination of these ERP components in children. The present study examined developmental differences in the ERN, Pe, and CRN in normal 10-year-old children and young adults in a standard visual flanker task. We found that children had smaller ERNs than adults, with no between-group differences on the Pe, and some ambiguity concerning the CRN. Results provide electrophysiological support either for late maturation of the ACC or late involvement of the ACC in response monitoring. Results also suggest that there is some functional independence of response-monitoring ERP components. Error-related ERPs may be a useful tool in studying the development of this brain region and its role in behavior in normal and atypical development.     

Response-compatibility effects in children

The Eriksen Flanker task is a classic paradigm for investigating interference at the level of response compatibility. Several previous studies analyzed the ability of young children (starting at the age of four years) to ignore flanking distractors in children-specific variants of the task. However, in all published studies the interference took place at the perceptual level as well as on the level of response compatibility because the ‘compatible condition’ involved stimulus congruency as well as response compatibility. By confounding stimulus congruency and response compatibility, interference at the level of response programming and priming at the perceptual level cannot be distinguished: the observed flanker effects might not be the result of successfully ignoring but instead might just be explained due to priming. We tested 57 children aged between 7 and 12 years in a flanker variant in which all trials were perceptually incongruent but different at the level of response compatibility (compatible versus incompatible). Children showed a flanker effect (faster reaction times in response compatible trials) that was, however, in terms of the effect size, smaller than flanker effects reported in previous studies.     

Interference Effects in a Numerical Stroop Paradigm in 9- to 12-year-old Children with ADHD-C

Attention deficit hyperactivity disorder (ADHD) is characterized by deficient self-regulation, poor attentional control, and poor response inhibition. To date, however, the extent to which these deficits affect basic interference control remains a matter of controversy. Secondly, ADHD has been reported to be associated with arithmetic deficits. It remains unclear whether such deficits are a secondary consequence of the above-mentioned characteristics of ADHD or whether basic numerical magnitude representations are also affected. In the present study we attempted to investigate these issues using a basic numerical interference paradigm.

Nine- to twelve-year-old children with ADHD-C (attention-deficit hyperactivity-disorder combined type) and control children without ADHD (each n = 16) were presented with two digits of possibly different physical sizes (e.g., 3 7). This numerical Stroop task requires subjects to make a magnitude classification concerning either the physical or the numerical stimulus dimension. The irrelevant dimension can be congruent (same response), incongruent (different response), or neutral (no response association).

Children with ADHD-C performed worse than control children in most analyses. The most important finding was a significant interaction of congruity effects with group in the numerical comparison task. Children with ADHD-C tended to show larger congruity and interference effects than controls, and these were not attributable to a speed-accuracy trade-off.

The results might reflect differential processing speeds, or a different degree of automatic activation of physical and numerical magnitudes in children with and without ADHD-C. Alternative explanations, such as insufficient inhibition of selective (domain-specific) attention are also discussed.     

Response inhibition and avoidance of virtual obstacles during gait in healthy young and older adults

Adjustments of preplanned steps are essential for fall avoidance and require response inhibition. Still, inhibition is rarely tested under conditions resembling daily living. We evaluated the ability of young and older adults to modify ongoing walking movements using a novel precision step inhibition (PSI) task combined with an auditory Stroop task.Healthy young (YA, n = 12) and older (OA, n = 12) adults performed the PSI task at 4 individualized difficulty levels, as a single and dual task (DT). Subjects walked on a treadmill by stepping on virtual stepping stones, unless these changed color during approach, forcing the subjects to avoid them. OA made more failures (40%) on the PSI task than YA (16%), but DT did not affect their performance. In combination with increased rates of omitted Stroop task responses, this indicates a “posture first” strategy. Yet, adding obstacles to the PSI task significantly deteriorated Stroop performance in both groups (the average Stroop composite score decreased by 13% in YA and 27% in OA). Largest deficit of OA was observed in rates of incorrect responses to incongruent Stroop stimuli (OA 35% and YA 12%), which require response inhibition. We concluded that the performance of OA suffered specifically when response inhibition was required.     

Age-related trends of stroop-like interference in animal size tests in 5- to 12-year-old children and young adults

Few studies have examined the development of Prepotent Response Inhibition (Nigg's interference control) from childhood to adulthood. This cross-sectional study examined differences in Prepotent Response Inhibition among children of 5 age groups: twenty 5- to 6-year-olds, twenty-one 7- to 8-year-olds, twenty-two 9- to 10-year-olds, eighteen 11- to 12-year-olds, and 24 young adults (18- to 24-year-olds). Participants were administered two Stroop-like tasks: the Real Animal Size Test described in 2009 by Catale and Meulemans, which requires that participants decide the real size of animals (big vs. small) displayed in a mismatching pictorial size; and the Pictorial Animal Size Test (an original test), which requires that participants report the pictorial size of the animals. Results showed clear differences between the tests. The Pictorial Animal Size Test elicited robust interference whereas the Real Animal Size Test elicited no interference. The Pictorial Animal Size Test also revealed the development of Prepotent Response Inhibition in children of 5–12 years and between children and young adults. These results were discussed with respect to differences in strengths of processing. The Pictorial Animal Size Test can be a useful tool for assessment of Prepotent Response Inhibition in children older than 5 years of age.     

疼痛表征在自我和他人间的一致性效应

在以往研究中“pain matrix”被认为是加工自我和他人疼痛信息的特异性神经机制, 也可能是个体对他人疼痛共情的原因。但是最近的研究发现非疼痛的感觉刺激也能激活该脑区, 因此疼痛表征在自我和他人间是否存在一致性受到质疑。研究采用启动范式从两个方面入手探索自身疼痛和疼痛共情间是否存在一致性关系。实验一使用疼痛和非疼痛图片为启动刺激, 疼痛或热刺激为靶刺激, 发现相对于非疼痛图片, 疼痛图片启动下被试对自身疼痛刺激的反应时减少, 疼痛水平和情绪反应增强。实验二使用疼痛和热刺激为启动刺激, 疼痛或非疼痛图片为靶刺激, 发现相对于热刺激, 疼痛刺激启动下被试对疼痛图片的反应时减少。同时, 在两个实验中非疼痛的靶刺激都不受启动刺激的影响。这说明疼痛表征在自我和他人间存在一致性效应。     

Sequential congruency effects in implicit sequence learning

We deal with situations incongruent with our automatic response tendencies much better right after having done so on a previous trial than after having reacted to a congruent trial. The nature of the mechanisms responsible for these sequential congruency effects is currently a hot topic of debate. According to the conflict monitoring model these effects depend on the adjustment of control triggered by the detection of conflict on the preceding situation. We tested whether these conflict monitoring processes can operate implicitly in an implicit learning procedure, modulating the expression of knowledge of which participants are not aware. We reanalyze recently published data, and present an experiment with a probabilistic sequence learning procedure, both showing consistent effects of implicit sequence learning. Despite being implicit, the expression of learning was reduced or completely eliminated right after trials incongruent with the learned sequence, thus showing that sequential congruency effects can be obtained even when the source of congruency itself remains implicit.