暴力犯罪者对负性情绪信息注意偏向的ERP研究

采用视觉搜索范式,探讨了暴力犯罪者对情绪刺激（愤怒面孔与高兴面孔）的注意偏向特点。行为数据显示,相比非暴力组,暴力组对愤怒面孔的反应要显著快于高兴面孔,初步验证了暴力犯罪者对负性情绪信息存在注意偏向。ERP数据进一步表明,当目标刺激为愤怒面孔时,暴力组N2pc的潜伏期要显著小于非暴力组,说明暴力犯罪者对愤怒面孔的觉察早于高兴面孔,对负性情绪刺激更为敏感。由于N2pc的波幅不存在显著差异,差异主要表现在反应时和潜伏期,说明暴力犯能够更快的觉察到负性情绪面孔,但并没有对其投入更多的注意资源,出现回避模式,表明暴力犯对负性情绪信息的加工是一种警觉—回避模式。     

认知诊断属性分类一致性信度区间估计三种方法

摘要：引入了三种可以估计认知诊断属性分类一致性信度置信区间的方法：Bootstrap法、平行测验法和平行测验配对法。用模拟研究验证和比较了这三种方法的表现,结果发现,平行测验法和Bootstrap法在被试量比较少、题目数量比较少的情况下,估计的标准误和置信区间较接近,但是随着被试量的增加,Bootstrap法的估计精度提高较快,在被试量大和题目数量较多时基本接近平行测验配对法的结果。Bootstrap法的所需时间最少,平行测验配对法计算过程复杂且用时较长,推荐用Bootstrap法估计认知诊断属性分类一致性信度的置信区间。     

激进生成论及其反表征主义革命

生成论是当代具身认知科学中的一个新取向。它反对传统认知科学中的表征主义观点,主张心智并非认识者对环境信息的表征和加工,而是行动的制造者,是特定身体构造和身体能力的行动者与环境的互动与耦合过程。激进生成论认为自创生的生成论和感觉运动的生成论在反对表征主义方面过于“温和”。因此,它主张“激进化”生成论,强调基本心智就是一种反应形式,不包含任何内容性心理表征。因此,它要掀起一场反表征主义“革命”。这一激进主张受到来自左右两方面的批评。     

中外两种主要推理模型的实验再比较研究

本研究采用2X2两因素(自变量分别为“心理模型数量”和不同“内容性质”)重复测量拉丁方实验方法,在范畴三段论推理题的内在结构为“形式正确”,且“推理者已经掌握相应的形式逻辑推理规则”的前提条件下,对西方学者提出的“心理模型”与中国学者提出的“推理题和推理者的推理知识双重结构模型”这两种理论模型再次进行了实验比较研究。结果表明,对于“正确形式—正确内容”和“正确形式—错误内容”两种不同结构的推理题,若按照形式逻辑规则来判定推理者“对各推理题的结论能否从两个前提中推论出来的推论结果”是否正确,则有:(1)当推理题含有错误内容的情况下,即使该推理题只是由“一个心理模型”所构成,也会使推理者降低对其结论判定为“正确”的可能性;(2)当推理题是由正确内容所构成时,即使该推理题是由三个心理模型所构成,对其结论判定为“正确”的可能性也要比“单模型——错误内容”构成的推理题的可能性更高。由此得到的比较结论是:在本实验条件下,“推理题和推理者的推理知识双重结构模型”对实验结果所做的解释要比“心理模型”理论所做的解释更为贴切。     

情绪刺激对前瞻记忆的影响

使用情绪图片作为背景任务刺激,通过两个实验来考察积极情绪和消极情绪对时间性和事件性前瞻记忆的影响。结果发现,对于背景任务的反应时,在时间性前瞻记忆和事件性前瞻记忆中,情绪的主效应都显著。而对于前瞻任务的正确率,在两种前瞻记忆中,情绪的主效应都不显著。将两个实验的数据合并分析发现,对于前瞻任务的正确率,任务类型的主效应显著,即时间性前瞻记忆的成绩显著高于事件性前瞻记忆; 而情绪的主效应不显著。结果表明,背景任务中不同的情绪刺激会对个体完成背景任务的速度产生影响,而对前瞻记忆任务的执行不会产生影响。     

世界大学排名比较中的再认启发式和线索推断

针对三种世界大学排名比较任务(综合实力、商业与管理专业、农业与林业专业),用问卷调查了208名大学生并考察其利用再认启发式和额外线索作推断的情况。结果发现:(1)被试在前两种任务中的正确率均超过60%,选择可再认学校的比率及其正确率也较高;(2)比较类别对再认的选择率及其正确率均有显著影响,效应量很大;(3)再认效度较低或无法利用再认时,被试的选择在不同程度上符合外国线索或专长线索的预测;(4)多出一条不利线索时,再认选择率比只有再认线索时有所降低但不低于50%,多出一条有利线索时,再认选择率的变化因线索而异,不一定显著地增加。     

The bilateral effect: callosal inhibition or intrahemispheric competition?

The magnification of visual field asymmetry observed with bilateral compared to unilateral tachistoscopic presentation of homologous stimuli (bilateral effect) can be explained by two hypothetical processes: homologous activation with subsequent inhibition of callosal information transfer or intrahemispheric competition for processing resources. A lexical decision task with unilateral and bilateral stimulation and response with the right or left hand was used in an attempt to decide between these hypotheses. Analysis of response time data revealed a bilateral effect, superimposed on a right visual field advantage, and no interaction between visual field and response hand. Results are consistent with the hypothesis of intrahemispheric competition in the left hemisphere.     

Reperfusion of Specific Brain Regions by Raising Blood Pressure Restores Selective Language Functions in Subacute Stroke

We report a series of six single subject studies examining the effects of pharmacological blood pressure elevation on regional brain perfusion and language function. Previous reports indicate that hypoperfusion of specific brain regions, as delineated by magnetic resonance perfusion weighted imaging (PWI), is associated with disruption of selective lexical functions. On this basis, we hypothesized that reperfusion of the same regions, in the absence of infarct in that region, would restore the associated lexical function. We present five patients with impaired lexical-semantics associated with poor perfusion, but not infarction, of Brodmann's area 22 (BA 22), and one patient with impaired lexical-semantics and a superimposed deficit in retrieving the phonological representations of words, associated with poor perfusion Brodmann's area 37 (BA 37) as well as BA 22. Each patient was treated with induced blood pressure elevation to increase perfusion of the ischemic and dysfunctional tissue. Daily testing of naming and comprehension, with stimulus sets matched for frequency, familiarity, and length, showed improved lexical-semantics in the patients who showed reperfusion of BA 22 and improved oral naming (but not lexical-semantics) in the patient who showed reperfusion of BA 37. These cases illustrate that loss of function with hypoperfusion of a circumscribed area of the brain, and recovery of the same function with improved perfusion of that brain region, can reveal brain/language relationships prior to reorganization after brain injury.     

Arrows of time in infancy: the representation of temporal-causal invariances

Many transformations that take place over time can only occur in one temporal direction, and adults are highly sensitive to the differences between forward and backward presentations of such events. In seven experiments using two selective-looking paradigms, 4- and 8-month-olds were shown forward and backward videotapes of events involving the effects of gravity on liquids and solid objects and of the separation of whole objects into pieces. Four-month-olds showed a significant preference for the forward version of liquid pouring from a beaker to a glass. Eight-month-olds looked longer at the forward versions of this and four other gravity-related events but showed no directional preferences for the separation events. Several experiments indicate that longer looking at the forward versions of the gravity stimuli is not a product of attraction to specific perceptual features of the stimuli. A model based on the development of representations of types of events is presented and evaluated.     

中医药发展的挤出效应及制度耦合

制度与制度之间常常存在挤出效应,在医疗卫生服务制度体系内,价格管制、支付制度和医疗卫生服务评价制度等,造成了对中医药政策和中医药应用的挤出.而中医药在我国医改战略转型、医学模式转变和促进制度创新方面具有十分积极的意义.制度耦合是解决制度冲突、制度挤出的基本思想,把中西医统一到卫生事业发展的目标上来,把发挥中医药优势和特色作为中医药政策的核心,构建中西医并重的机制、优化医疗卫生服务制度结构和完善中医药评价体系,是缓解挤出效应,促进中医药发展的制度选择.