篮球运动员视觉工作记忆对注意控制的影响

采用视觉搜索任务范式,以不同工作记忆容量的篮球运动员作为研究参与者,探讨了视觉工作记忆对自上而下注意控制的影响。结果表明,不同视觉工作记忆容量的篮球运动员的注意控制能力存在差异,高视觉工作记忆容量组的成绩略优于低视觉工作记忆容量的篮球运动员;视觉工作记忆中信息性质影响注意控制,其影响作用是通过记忆项目特征与目标项目特征相匹配的情况来实现,这个影响过程不受视觉工作记忆容量大小的调节。     

图形规则性对客体和空间工作记忆存储的影响

采用单探测变化检测范式,考察了单维度特征图形在视觉客体和视觉空间工作记忆中的存储机制,并对这两种视觉工作记忆的容量进行测定。结果显示,在客体工作记忆中,规则图形的记忆成绩显著高于不规则图形,但在空间工作记忆中,这两种图形的记忆成绩无显著差异;空间工作记忆的存储容量显著大于客体工作记忆容量,分别为4-5个位置和3-4个客体。这表明,图形规则性影响了客体工作记忆的存储但不影响空间工作记忆的存储,由单维度特征组成的图形在客体工作记忆中是以特征为单元储存,而在空间工作记忆中是以整合方式储存。     

右侧背外侧前额叶在视觉工作记忆中的因果性作用

以往的影像学研究表明右侧背外侧前额叶皮层(DLPFC)在视觉工作记忆中发挥重要作用, 然而缺乏因果性的证据。本研究旨在考察右侧DLPFC的激活与视觉工作记忆容量的因果关系, 并探讨这一关系受到记忆负荷的调节及其神经机制。被试接受经颅直流电刺激之后完成视觉工作记忆变化检测任务, 根据被试在虚假刺激情况下从负荷4到负荷6任务记忆容量的增量将被试分为低记忆增长潜力组(简称低潜力组)和高记忆增长潜力组(简称高潜力组), 结果发现正性电刺激右侧DLPFC相对于虚假电刺激显著提升了高潜力组被试在低记忆负荷(负荷4)下的记忆容量及其对应的提取阶段的脑电指标SPCN成分。表明右侧DLPFC在视觉工作记忆的提取阶段发挥重要的因果性作用; 正性经颅直流电刺激右侧DLPFC可使工作记忆容量高潜力被试获得更多的脑活动增益, 并导致更好的行为提升效果。     

非言语型学习障碍儿童视觉空间工作记忆的研究

目的探讨非言语型学习障碍儿童视觉空间工作记忆的特点.方法采用分别考察视觉空间工作记忆的存储和加工能力的被动记忆、主动记忆、图片记忆和词义联想四个实验任务,比较了非言语型学习障碍儿童(NLD)与言语型学习障碍儿童(VLD)及正常儿童视觉空间工作记忆的差异.结果NLD儿童在四个实验任务上的成绩均显著低于VLD儿童和正常儿童,而VLD与正常儿童之间差异不显著.结论NLD儿童的视觉空间工作记忆存在缺陷.     

工作记忆广度与汉语句子语境效应的关系

采用计算机快速系列视觉呈现技术,以反应时为指标,利用命名法,从工作记忆容量个体差异的角度,探讨汉语句子阅读中的语境效应。本研究将句子的语境效应分为两个来源：一个是自动激活扩散的词汇之间的语义启动,另一个是相互作用的句子水平的主题启动。结果表明：词汇间的语义启动不受工作记忆容量的影响,并且不易受到无关记忆任务的干扰。句子水平的主题启动会受到工作记忆容量的影响：工作记忆广度较高的读者能出现主题水平的语境效应,但是在无关记忆任务的干扰下,句子主题水平的语境效应消失;低广度的读者在无外部记忆负荷和有外部记忆负荷两种条件下都没有出现主题水平的语境效应。工作记忆容量对那些需要较多认知资源的加工过程产生显著的影响,实验结果符合工作记忆容量限制理论     

两维特征图形的客体和空间工作记忆存储研究

研究采用单探测变化检测范式,考察了两维特征图形在视觉客体和视觉空间工作记忆中的存储机制,并对其容量进行测定。40名被试(平均年龄20.56±1.73岁)随机分为两个等组,分别完成实验一和实验二。实验一的刺激图形由颜色和形状两基本特征组成,实验二的刺激为由不同颜色和开口朝向组成的兰道环。两个实验结果均显示:(1)特征交换变化条件下的记忆成绩与单特征变化条件下最差的记忆成绩差异不显著;(2)空间工作记忆任务的成绩显著优于客体工作记忆任务;(3)被试在视觉工作记忆中能存储2~3个客体和3~4个空间位置。这表明,由两种不同维度特征组成的图形在视觉客体和视觉空间工作记忆中均以整合方式进行存储,空间工作记忆的容量大于客体工作记忆。     

体感游戏训练对生物运动工作记忆容量的影响

传递生物体运动信息的生物运动在工作记忆中有着独立于一般视觉客体的存储空间。尽管研究发现电子游戏训练可提高工作记忆(如一般视觉客体)容量,但尚未有研究探讨游戏训练对生物运动工作记忆容量的影响。本研究采用Kinect体感游戏训练,首次对该问题进行探讨。实验中控制组被试与实验组被试均先后做两次生物运动记忆实验,但实验组在第一次实验后进行为期14天的体感游戏训练。结果发现,尽管生物运动工作记忆绩效在后测时较前测有显著上升,但是游戏训练并未显著提高实验组的记忆绩效,说明生物运动工作记忆并不受体感交互游戏训练影响。     

干预不同个体记忆内容对负性刺激诱发的情绪水平影响*

探讨记忆在情绪发生和调节中的作用,通过干预个体对负性刺激的记忆内容,研究了积极干预、消极干预和不干预三组被试在接受负性刺激后产生的情绪水平差异,以及不同认知方式个体对诱发情绪的不同反应。结果表明,干预类型对负性刺激诱发的消极情绪产生了一定影响:积极干预组和不干预组在消极情绪后测上的得分显著低于消极干预组,积极干预组与不干预组的得分差异不显著。认知方式、性别及干预顺序对诱发情绪的影响不显著。结论:干预记忆内容可影响负性刺激诱发的消极情绪水平,接受积极干预比消极干预产生的消极情绪水平更低,因此对记忆内容的积极干预可有效降低产生的消极情绪水平。     

视觉工作记忆中特征绑定关系的记忆机制

弱客体理论认为, 视觉工作记忆系统是由众多特征存储的子系统组成, 不同纬度的特征独立存储在相应的有限容量的子系统中, 相互之间不会竞争记忆资源。而对于特征之间绑定关系的记忆存在不同的观点。一种观点认为绑定关系的记忆需要注意维持, 因此绑定关系的记忆会占用到特征记忆的资源; 另一种观点认为绑定关系的记忆是自动发生的, 不需要注意的维持。本实验的目的是探究特征绑定关系的记忆是否是自动发生的。在实验中, 我们设计了两种任务, 一种任务是只记忆颜色, 另一种任务是记忆颜色跟位置及其之间的绑定关系, 并测试分析视觉工作记忆相关的ERP成分CDA。结果发现两种任务条件下的CDA波幅之间没有显著差异, 说明视觉工作记忆中的特征绑定是自动发生的。     

不同社会情境对儿童奖惩分配公平性的影响

为探讨社会排斥和社会接纳情境下儿童奖惩分配公平性,研究采用个体-偶然排斥范式和第三方奖惩分配范式,对8~9岁儿童奖惩分配公平性行为和奖惩分配公平性判断进行研究,结果发现：（1）社会排斥组被试的奖惩分配公平性行为显著多于社会接纳组,奖惩分配不公平性行为显著少于社会接纳组。9岁组被试的奖惩分配公平性行为显著多于8岁组,奖惩分配不公平性行为显著少于8岁组;（2）社会排斥组被试的奖惩分配公平性判断显著高于社会接纳组,9岁组被试的奖惩分配公平性判断显著高于8岁组,奖惩分配不公平性判断显著低于8岁组。结论：社会情境影响儿童的奖惩分配公平性,在排斥情境下,8~9岁儿童的奖惩分配公平性明显提升;8~9岁儿童的奖惩分配公平性随年龄增长有上升趋势。     

社交焦虑个体对正性面孔刺激的解释偏差

本研究分别在短时（60ms）和长时（无时间限制）条件下呈现匹配的正性和中性面孔,要求高、低社交焦虑被试选择更具威胁性的面孔,以验证两者对正性刺激是否存在主观解释偏差,并考察该偏差产生于认知加工的哪一阶段。结果发现,长时条件下,高焦虑组选择正性面孔的比例显著高于低焦虑组;短时条件下无显著差异。提示高社交焦虑个体对正性刺激存在主观、外显的解释偏差,他们更倾向于对正性刺激做出消极解释,并且这种偏差产生于认知加工的后期。     

Identity and expression memory for happy and angry faces in social anxiety

We examined the influence of social anxiety on memory for both identity and emotional expressions of unfamiliar faces. Participants high and low in social anxiety were presented with happy and angry faces and were later asked to recognise the same faces displaying a neutral expression. They also had to remember what the initial expressions of the faces had been. Remember/know/guess judgements were asked both for identity and expression memory. For participants low in social anxiety, both identity and expression memory were more often associated with "remember" responses when the faces were previously seen with a happy rather than an angry expression. In contrast, the initial expression of the faces did not affect either identity or expression memory for participants high in social anxiety. We interpreted these findings by arguing that most people tend to preferentially elaborate positive rather than negative social stimuli that are important to the self and that this tendency may be reduced in high socially anxious individuals because of the negative meaning they tend to ascribe to positive social information.     

社会排斥对消费选择偏向的影响：怀旧的调节作用及社会联结的中介作用

社会排斥会导致许多消极影响,人们会尝试通过各种策略对此进行缓解,而消费是其中重要的一种应对方式。本文通过3个实验考察了社会排斥和消费选择偏向（体验性消费vs.实物性消费）的关系,同时探讨了怀旧的调节作用和社会联结的中介作用。结果发现,社会排斥可以提高消费者对体验性消费的偏好,怀旧调节了社会排斥与体验性消费偏向的关系,并通过社会联结的中介作用进一步缓冲了社会排斥对消费选择偏向的影响。     

It's not all in the face: reduced face visibility does not modulate social segmentation

Humans rely on social information to parse environmental content into social and nonsocial events. Here, we assessed if information conveyed by faces was necessary for this process. We asked participants to view a video clip depicting a social interaction and mark social and nonsocial events while actors’ faces were either visible or blurred. Keypress and eye-movement data were collected. Participants consistently identified social and nonsocial event boundaries independently of face availability, with greater agreement and less variability in keypresses for social relative to nonsocial events. Eye-tracking revealed that participants attended more to actors’ faces when they were visible and more to bodies when faces were blurred. Thus, face information is not necessary for social segmentation, which appears to be a flexible process that depends on a range of information conveyed by both faces and bodies.     

Visual Attention Patterns of Socially Anxious Individuals When Using Facebook: An Eye Tracking Study

Social networking sites (SNSs) are an increasingly used medium for social interactions. For socially anxious individuals, SNS-based communication is often preferred over traditional face-to-face socializing. Yet, research on SNSs usage and social anxiety is still less common, with extant studies being mostly correlational among healthy nonanxious participants. Conversely, here, we examined differences in actual gaze patterns to social and nonsocial stimuli between socially anxious and nonanxious individuals while using Facebook. Socially anxious and nonanxious student participants freely viewed a genuine Facebook profile page designed for the present study, for 3.5 minutes, containing 12 social and 12 nonsocial picture stimuli. Gaze patterns on social and nonsocial areas of interest (AOIs) were explored. Subjective uneasiness experienced when viewing the social pictures and state anxiety were also assessed. Finally, 2 weeks following the task, we evaluated participants’ willingness to participate in a follow-up (fictitious) study that required them to passively view their own Facebook profile, and then to actively use it. Results showed that compared with nonanxious participants, socially anxious participants demonstrated a viewing pattern less favoring social pictures, reflecting an attentional avoidance tendency. A significant inverse correlation between subjective uneasiness and percent of dwell time spent on the social AOI emerged. Socially anxious participants also reported higher levels of state anxiety, which was significantly positively correlated with uneasiness scores. Finally, socially anxious participants were also less willing to actively use their Facebook profile page. This study suggests that social anxious individuals are characterized by attentional and behavioral avoidance tendencies when using Facebook.     

Whatever? The effect of social exclusion on adopting persuasive messages

The aversive state of social exclusion can result in a broad range of cognitive deficits. Being unable or unmotivated to process relevant information, we assumed that social exclusion would also affect the success of persuasive attempts. We hypothesized that socially excluded people would adopt attitudes regardless of persuasion quality. In three studies using different manipulations of social exclusion and persuasion, we showed that participants who were socially excluded adopted persuasive messages regardless of argument quality. In contrast, this undifferentiated response was not shown by socially included participants who were more persuaded by high- compared to low-quality arguments. In Study 3, we moreover revealed that this pattern could only be replicated in reliable situations—that is, when the communicator appeared credible. These findings support the assumption that social exclusion can lead to reduced processing of information.     

Motivated social memory: Belonging needs moderate the own-group bias in face recognition

The current research examines why people have superior recognition memory for own-group members compared to other-group members. In two studies, we provide evidence for one motivational mechanism underlying own-group bias—social belonging needs. In Study 1, participants assigned to a minimal group had superior memory for own-group compared to other-group faces, replicating previous research on the own-group bias. This pattern was moderated by participants' need to belong: participants who reported a higher (versus lower) need to belong showed greater own-group memory bias. In Study 2, participants who were socially excluded had superior memory for own-university compared to other-university faces than participants who were selected to work alone by a computer. Together, these studies suggest that chronic belonging needs and social exclusion motivate own-group bias. (124 words)     

Differential subjective and psychophysiological responses to socially and nonsocially generated emotional stimuli

Sociality may determine the subjective experience and physiological response to emotional stimuli. Film segments induced socially and nonsocially generated emotions. Comedy (social positive), bereavement (social negative), pizza scenes (nonsocial positive), and wounded bodies (nonsocial negative) elicited four distinct emotional patterns. Per subjective report, joy, sadness, appetite, and disgust were elicited by the targeted stimulus condition. The social/nonsocial dimension influenced which emotional valence(s) elicited a skin conductance response, a finding that could not be explained by differences in subjective arousal. Heart rate deceleration was more responsive to nonsocially generated emotions. Taken together, these findings suggest that sociality affects the physiological profile of responses to emotional valence.     

The relativity of time perception produced by facial emotion stimuli

We systematically examined the impact of emotional stimuli on time perception in a temporal reproduction paradigm where participants reproduced the duration of a facial emotion stimulus using an oval-shape stimulus or vice versa. Experiment 1 asked participants to reproduce the duration of an angry face (or the oval) presented for 2,000 ms. Experiment 2 included a range of emotional expressions (happy, sad, angry, and neutral faces as well as the oval stimulus) presented for different durations (500, 1,500, and 2,000 ms). We found that participants over-reproduced the durations of happy and sad faces using the oval stimulus. By contrast, there was a trend of under-reproduction when the duration of the oval stimulus was reproduced using the angry face. We suggest that increased attention to a facial emotion produces the relativity of time perception.     

The Effects of Social Anxiety and State Anxiety on Visual Attention: Testing the Vigilance–Avoidance Hypothesis

A growing theoretical and research literature suggests that trait and state social anxiety can predict attentional patterns in the presence of emotional stimuli. The current study adds to this literature by examining the effects of state anxiety on visual attention and testing the vigilance–avoidance hypothesis, using a method of continuous visual attentional assessment. Participants were 91 undergraduate college students with high or low trait fear of negative evaluation (FNE), a core aspect of social anxiety, who were randomly assigned to either a high or low state anxiety condition. Participants engaged in a free view task in which pairs of emotional facial stimuli were presented and eye movements were continuously monitored. Overall, participants with high FNE avoided angry stimuli and participants with high state anxiety attended to positive stimuli. Participants with high state anxiety and high FNE were avoidant of angry faces, whereas participants with low state and low FNE exhibited a bias toward angry faces. The study provided partial support for the vigilance–avoidance hypothesis. The findings add to the mixed results in the literature that suggest that both positive and negative emotional stimuli may be important in understanding the complex attention patterns associated with social anxiety. Clinical implications and suggestions for future research are discussed.