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1. chinaXiv:202102.00086 [pdf]

自身得失对朋友博弈结果评价的影响:来自ERPs的证据

岳童; 黄希庭; 岳彩镇; 薛黎明; 傅安国
Subjects: Psychology >> Social Psychology

本研究通过经典的金钱博弈任务,以FRN和P300为反应指标,探讨了自身获益或损失对朋友结果评价分别会产生何种影响,以及这种影响模式是如何受到个体自我建构方式调节的。结果发现,在自身获益条件下,观看朋友损益之间的FRN和P300差异不再存在;在自身损失条件下,虽然观看朋友输赢之间的P300差异消失了,但FRN差异依然显著。不仅如此,无论自身得失,独立型自我建构启动组在观看朋友损益上的FRN差异均不再显著,但在自身获益后看到朋友损失能激发更强的P300波幅。本研究结果表明:(1) 对朋友的结果评价模式并非固定不变,而是会随个体自身所处得失境遇的不同而有所区别;(2) 相对于互依型自我建构启动组,独立型自我建构启动组在面对朋友的得失时表现得更为冷漠并更具竞争性。

submitted time 2021-02-26 Hits170Downloads129 Comment 0

2. chinaXiv:202102.00083 [pdf]

试次历史对跨通道非空间返回抑制的影响

张明; 桑汉斌; 鲁柯; 王爱君
Subjects: Psychology >> Cognitive Psychology

个体对刺激的反应不仅受刺激本身的影响,还会受到先前刺激的影响,表现为对当前试次中刺激的反应会受到前一试次的影响,即试次历史。本研究采用“线索-中性线索-靶子”范式探讨前一试次有效性对跨通道的非空间返回抑制的影响。实验1通过连续两个试次间的线索有效性考察在跨通道非空间返回抑制中试次历史的影响。为了在跨通道非空间返回抑制中减小试次历史的影响,实验2通过延长试次间时间间隔考察跨通道非空间返回抑制中试次历史的作用是否减小。结果发现,前一试次线索无效时,当前试次中的返回抑制效应量显著小于前一试次有效时,这种影响会根据试次中线索和靶子通道的不同而不同。并且当延长试次间的时间间隔可以有效地减少前一试次对当前试次的影响。因此本研究表明,试次历史能够对跨通道非空间返回抑制产生影响,并且这种影响可以通过增大试次间时间间隔来减小

submitted time 2021-02-25 Hits105Downloads53 Comment 0

3. chinaXiv:202102.00085 [pdf]

An electrophysiological investigation of the temporal asynchrony effect on character-speech sound integration in Chinese typically developing children and children with dyslexia

Du, Yingchun; Li, Yizhen; Qin, Li; Bi, Hongyan
Subjects: Psychology >> Developmental Psychology

The neural mechanism of orthographic-phonological integration was influenced by the temporal relationship of cross-modal stimuli. However, previous studies mainly investigated the neural mechanism of letter-speech sound integration in precise temporal synchrony or small temporal asynchrony conditions. In this study, character-speech sound integration was investigated in a relatively wide temporal window. Chinese characters were presented synchronously to the onset of speech sounds or before speech sound by 300 or 600 ms (referred as AV0, AV300 and AV600). ERP responses evoked by congruent condition (speech sounds were paired with congruent visual characters) and baseline condition (speech sounds were paired with Korean characters) were compared. Different electrophysiological markers were found in the temporal synchrony and temporal asynchrony conditions. In the AV0 condition, developing dyslexia (DD) and typically developing (TD) children showed similar congruency effect on P1, N170 and N300 components, demonstrating the influence of speech sound on visual character processing. In the AV300 condition, DD group showed left-lateralized congruency effect on N200, whereas TD children showed bilateral congruency effect on N200. Both groups showed bilateral congruency effect on N200 in the AV600 condition. We speculate that the insufficient character-speech sound integration exhibited by dyslexic children in the AV300 condition was probably caused by their slow visual processing speed. The results provide unique insight into the neural mechanism of print-speech integration in a wide temporal window and point out the necessity to investigate neural mechanism of print-speech integration in a relatively wide temporal window.

submitted time 2021-02-25 Hits85Downloads40 Comment 0

4. chinaXiv:202102.00084 [pdf]

长期高策略性技能训练对运动员大脑白质结构的影响:一项DTI研究

祁亚鹏; 王怡萱; 朱桦; 周成林; 王莹莹
Subjects: Psychology >> Other Disciplines of Psychology

目前关于运动员经验优势的脑机制还存在争议,尤其对于涉及较多认知过程参与的高策略性技能项目运动员,其大脑白质结构可塑性变化还需进一步探究。研究横向对比了乒乓球运动员和非运动员大脑白质纤维束的弥散张量成像数据。结果发现,相比于非运动员,乒乓球运动员在连接背侧和腹侧通路脑区的双侧皮质脊髓束、左侧上纵束、左侧下纵束和双侧额枕下束的各向异性值(FA)更大,进一步分析发现,部分腹侧通路白质纤维束FA增加的原因是径向扩散系数(RD)下降。研究结果支持了动作双通路模型。提示经过长期高策略性技能训练,乒乓球运动员在背侧和腹侧通路上的白质纤维束结构完整性增强。

submitted time 2021-02-25 Hits113Downloads63 Comment 0

5. chinaXiv:202102.00082 [pdf]

汉语发展性阅读障碍儿童视觉同时性加工技能子成分的发展及其与阅读的关系

李杰; 杨悦; 赵婧
Subjects: Psychology >> Cognitive Psychology

通过分别以高频汉字(实验1)和图形非言语材料(实验2)为刺激的两个联合视觉注意任务,并采用基于Budensen视觉注意理论的参数估计方法,系统地探查小学三~六年级汉语发展性阅读障碍儿童的视觉同时性加工技能缺陷的内在机制。以43名汉语发展性阅读障碍儿童和46名生理年龄匹配典型发展儿童为被试,每类被试均被分为小学中年级组(三、四年级)和高年级组(五、六年级)。两个实验均发现不同年级组的阅读障碍儿童在知觉加工速度参数上显著小于控制组儿童。在空间注意分布权重参数上,实验1的结果显示,不同于控制组儿童向左侧化发展的注意分布模式,两个年级组的阅读障碍儿童均表现为无偏的注意分布;而实验2未发现显著组别差异。且这两种同时性加工子技能分别与不同水平的汉语阅读技能密切相关。结果表明,汉语阅读障碍儿童在同时加工多个视觉刺激时存在持续的知觉加工速度缓慢的问题,在同时加工言语类刺激时还表现出异常的空间注意分布模式。本研究有助于从基础认知层面揭示汉语发展性阅读障碍儿童的缺陷机理,为进一步设计相关的提高阅读效率的干预方案提供理论依据。

submitted time 2021-02-25 Hits173Downloads97 Comment 0

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