工作记忆表征精度加工需求对注意引导的影响

采用注意捕获范式, 通过行为和事件相关脑电位(ERP)实验, 探讨工作记忆表征精度加工需求对注意引导的影响, 行为结果发现, 在低精度加工需求条件下, 只有一个工作记忆表征引导注意, 且处于高激活状态的工作记忆表征产生的注意捕获大于低激活状态; 而在高精度加工需求条件下, 有两个工作记忆表征引导注意, 且处于高、低激活状态的工作记忆表征产生的注意捕获没有差异。ERP结果显示, 高精度加工需求条件下诱发的NSW和LPC大于低精度加工需求条件; 在高精度加工需求条件下, 干扰项与记忆项匹配比不匹配时, 诱发更大的N2和更小的N2pc, 而在低精度加工需求条件下, 干扰项与记忆项匹配和不匹配时诱发的N2、N2pc没有差异。研究表明, 工作记忆表征精度加工需求影响注意引导的机制可能是高精度加工需求下, 工作记忆表征消耗的认知资源增加, 搜索目标获得的资源减少, 干扰项捕获的注意增加。     

社交网站中的自拍对友谊质量的影响:一个有调节的中介模型

探讨社交网站中的自拍与友谊质量的关系,及线上积极反馈和外倾性在二者关系中的作用机制.采用社交网站中的自拍、线上积极反馈、友谊质量和外倾性量表对490名大学生进行问卷调查.结果 表明:(1)社交网站中的自拍显著正向预测大学生的友谊质量;(2)社交网站中的自拍通过线上积极反馈影响大学生友谊质量的后半段路径受外倾性的调节,具...     

The functional role of alternation advantage in the sequence effect of symbolic cueing with nonpredictive arrow cues

Previous studies have shown that attention orienting is influenced by the orienting processes of previous trials in a spatial-cueing paradigm. This sequence effect is due to the fact that performance is facilitated when cue validity (valid or invalid) repeats between trials. In this study, we investigated the influences of cue direction and target location on the sequence effect of symbolic cueing with a nonpredictive central arrow cue. The cue direction was manipulated to always point in a certain direction in one condition, and to always point in the opposite direction in a second condition. The results showed that sequence effects were enhanced by the alternation of cue direction and target location and were impaired by the repetition of cue direction and target location. The same result pattern was found when the cue direction was chosen randomly in the third condition. The results suggested that both the repetition advantage effect of cue validity and the alternation advantage effect of cue direction and target location are involved in the sequence effect within the symbolic-cueing paradigm.     

With or without a hole: young infants' sensitivity for topological versus geometric property

Evidence from adult psychophysics, brain imaging, and honeybee's behaviour has been reported to support the notion that topological properties are the primitives of visual representation (Chen, 1982 Science 218 699-700). Here, we ask how the sensitivity to topological property might originate during development. Specifically, we tested 1.5- to 6-month-old infants' visual sensitivity for topological versus geometric properties with the forced-choice novelty preference technique. A disk and a ring were used in the topologically different condition (experiment 1), while a disk and a triangle were used in the geometrically different condition (experiment 2). Spontaneous preferences for the disk, the ring, and the triangle were measured pairwise using the preferential looking-time technique (experiment 3). The results showed that infants could reliably discriminate stimuli based on topological differences, but failed to do so with geometric differences. Moreover, in the generalisation task, infants showed higher novelty preference for the topologically different figure (the ring). In addition, the results of both experiments cannot be attributed to a spontaneous preference for the ring or for the disk. Further analysis on individual infants' age and performance revealed two distinct developmental trends. Infants seem to be sensitive to topological differences as young as 1.5 months, while their ability to discriminate geometric differences was at chance before 3 months and gradually improved with age. Taken together, our findings suggested an early sensitivity for topological property, at least for the detection of stimuli with or without a hole.     

基于基尼系数与洛伦茨曲线的辽宁卫生资源公平性分析

采用基尼系教与洛伦茨曲线,按人口分布和地理分布对辽宁省卫生资源的公平性进行分析评价,评价指标包括医院(卫生院)床位数、卫生总人员数、卫生技术人员数、医师数和护士(师)数等五项.评价结果显示,辽宁卫生资源配置的总体公平性较好,但部分指标的公平性较差,按人口分布公平性优于按地理分布公平性.     

关于我国医患会话研究的思考

医患会话分析是一种尊重语言事实的社会学实证研究方法.我国研究者主要从医患会话的语言结构组合特点和基本特征;医患合作模式、特点和原则以及医患会话信息传递方式等方面进行了分析.目前研究中存在语料的覆盖面、典型性不够,分析语言现象与本质的逻辑不严密,语料属性判断标准不统一,研究目标不明确等主要问题.     

Phosphorylated nerve growth factor-induced clone B (NGFI-B) translocates from the nucleus to mitochondria of stressed rat cardiomyocytes and induces apoptosis

Stress induces cardiac dysfunction and cardiomyocyte injury, and while current data indicate that mitochondria play a key role in this process, the mechanisms remain unknown. In this study, we found that in rats, restraint stress induced nerve growth factor-induced clone B (NGFI-B) translocation from the nucleus to mitochondria in cardiomyocytes. This translocation promoted cytochrome c release from mitochondria to the cytoplasm, which ultimately resulted in cardiomyocyte apoptosis. We also found that stress induced oversecretion of glucocorticoids and activated the protein kinase A (PKA) pathway in cardiomyocytes. Enhanced PKA activity increased NGFI-B serine phosphorylation, which caused NGFI-B to translocate from the nucleus to mitochondria. Moreover, a PKA peptide inhibitor blocked NGFI-B serine phosphorylation and translocation. Our data demonstrate that stress affects cardiomyocytes by inducing NGFI-B mitochondrial translocation via serine phosphorylation, which in turn initiates mitochondrial-mediated apoptosis.     

青少年留守经历对网络成瘾的影响:病理性互联网使用的认知行为模型视角

基于病理性互联网使用的认知行为模型,本研究考察青少年留守经历对网络成瘾的影响,并检验非适应性认知的中介作用和粗暴养育的调节作用。以525名中学生为被试,采用非适应性认知问卷、粗暴养育问卷和网络成瘾问卷进行测试,结果发现:(1)有留守经历的个体非适应性认知和网络成瘾的程度更高,而且非适应性认知越强,网络成瘾程度越高;(2)留守经历通过非适应性认知的中介作用影响网络成瘾;(3)留守经历对非适应性认知的影响受到粗暴养育的调节。具体而言,经历较多粗暴养育的青少年,留守经历会增加非适应性认知;但是对于经历较少粗暴养育的青少年,留守经历不会对非适应性认知产生影响。本研究的结果表明,青少年留守经历会增强非适应性认知,进而增加网络成瘾的倾向。但是,如果青少年家庭中粗暴养育程度较低,青少年留守经历对非适应性认知的影响就会消失。     

群体购买情境下冲动性购买影响研究：解释水平视角

本研究基于解释水平理论视角,检验了消费者在群体购买情境中的冲动性购买行为.研究1采用2（解释水平：高vs.低）＆#215;2（自我建构：独立vs.互依）组间因子设计,用来检验解释水平是否调节自我建构类型对冲动性购买的影响;研究2采用2（解释水平：高vs.低）＆#215;2（认知模式：感知vs.模拟）组间因子设计,检验认知模式和解释水平对冲动性购买的联合影响.实验结果表明：群体购买情境下,消费者自我建构类别不同,冲动性购买意愿也不同,且受到解释水平的调节影响;群体购买情境下,消费者对他人认知模式的不同,对自身冲动性购买的影响也不同,解释水平在其中也起到了调节作用.