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     

语境和动词信息对主题角色指派的影响

以大学生为被试,采用DMDX系统,运用自控速的逐词意义判断法,探讨语境和动词的限定信息在主题角色指派中的作用。结果发现：被试能够根据语境和动词的限定信息对动词后的主项进行预期。当语境中引进的先行词能够成为动词后的合理主项时,被试可以利用语境信息和动词的限定信息,在句法明确的做出角色指派以前,给语境中引进的先行词指派角色。     

人格特质与外显自尊和内隐自尊的关系

自尊被认为与人格特质之间存在紧密的联系。近年来社会认知研究领域发现,在传统“外显自尊”以外,个体还存在一个“内隐自尊”结构。由于中国人格结构与西方“大五”人格结构存在系统性的差异,本研究试图考察在中国文化下个体的人格特质与自尊水平之间的关系。结果发现,外显自尊主要与中国人人格结构中的“自我指向”的人格特点关系紧密;内隐自尊作为一个独立于外显自尊的内隐态度结构,与各个人格特质不存在显著的相关     

Reevaluating the role of the medial prefrontal cortex in delay eyeblink conditioning

It has been proposed that the medial prefrontal cortex (mPFC) is not necessary for delay eyeblink conditioning (DEC). Here, we investigated the involvement of the mPFC in DEC with a soft or loud tone as the conditioned stimulus (CS) by using electrolytic lesions or muscimol inactivation of guinea pig mPFC. Interestingly, when a soft tone was used as a CS, electrolytic lesions of the mPFC significantly retarded acquisition of the conditioned response (CR), and muscimol infusions into mPFC distinctly inhibited the acquisition and expression of CR, but had no significant effect on consolidation of well-learned CR. In contrast, both electrolytic lesions and muscimol inactivation of mPFC produced no significant deficits in the CR when a loud tone was used as the CS, or in the unconditioned response (UR) when a soft or loud tone was used as the CS. These results demonstrate that the mPFC is essential for the DEC with the soft tone CS but not for the DEC with the loud tone CS.     

Mental representations of arithmetic facts: evidence from eye movement recordings supports the preferred operand-order-specific representation hypothesis

There are three main hypotheses about mental representations of arithmetic facts: the independent representation hypothesis, the operand-order-free single-representation hypothesis, and the operand-order-specific single-representation hypothesis. The current study used electrical recordings of eye movements to examine the organization of arithmetic facts in long-term memory. Subjects were presented single-digit addition and multiplication problems and were asked to report the solutions. Analyses of the horizontal electrooculograph (HEOG) showed an operand order effect for multiplication in the time windows 150-300?ms (larger negative potentials for smaller operand first problems than for larger operand first ones). The operand order effect was reversed in the time windows from 400 to 1,000?ms (i.e., larger operand first problems had larger negative potentials than smaller operand first problems). For addition, larger operand first problems had larger negative potentials than smaller operand first in the series of time windows from 300 to 1,000?ms, but the effect was smaller than that for multiplication. These results confirmed the dissociated representation of addition and multiplication facts and were consistent with the prediction of the preferred operand-order-specific representation hypothesis.     

《文化演化与宗教》

社会学家贝拉(Robert Bellah)在其颇具影响力"宗教演化"的文章中,根据广泛的人类经验提出了一个检验文化和宗教互动的模式。贝拉在其雄心勃勃的计划中还是保持相当的谦虚,他警觉到其所用的例证源于历史文献,而模式本身则不是历史。模式是"一种思考的工具":一个用来指导思考的理论性框架,而非基于田野调查的经验性描述。在我们下面的讨论中,我们将使用贝拉的"思考工具"的基本模式,将包括来自贝拉本人和其他宗教学者研究中的一些修正和补充的内容。     

不同戒断期海洛因戒断者情绪加工的损伤和恢复

成瘾过程伴随着一系列心理和脑机能的改变.已有研究表明,海洛因成瘾者存在对情绪刺激的加工缺陷.这些认知变化被认为与成瘾者脑内“奖赏系统”功能紊乱有关,但这种认知功能缺陷是否随着戒断进行而有所恢复还未得到明确结论.该研究采用ERP技术,记录了控制组、短期戒断组、中期戒断组和长期戒断组被试在情绪刺激加工过程中的神经电活动.结果发现,与中性刺激相比,长期组与控制组一致,正、负性刺激诱发被试更大的P300和SPW平均波幅,两类情绪刺激诱发的SPW波幅差异不显著;中期组被试的正性和负性刺激诱发的P300和SPW波幅都显著大于中性刺激,且负性刺激诱发的两成分的波幅显著大于正性刺激;短期组被试的负性刺激引起的P300和SPW波幅显著大于中性和正性刺激,但是正性和中性刺激诱发的P300或SPW波幅之间差异不显著.结果表明,随着戒断进行,海洛因戒断者情绪加工能力有所改善,主要表现在对正性情绪刺激加工能力的恢复.     

预防性气管切开在上段食管癌手术中的效用

探讨预防性气管切开在伴慢性阻塞性肺疾病(chronic obstructive pulmonary disease,COPD)且长期大量吸烟的上段食管癌术后的应用,分析其对患者术后肺部感染、低氧血症、心律失常的影响.回顾性分析我科2011年6月~2013年1月伴有COPD及长期大量吸烟的上段食管癌行手术切除颈部吻合的病例,并分为预防性气管切开组和非预防性气管切开组.统计并分析两组术后肺部感染、低氧血症、心律失常等并发症的发生情况.结果对于上段食管癌行根治手术的患者,尤其是伴有长期大量吸烟及COPD的患者来说,预防性气管切开可以起到预防术后呼吸道并发症的发生,并能减少术后心律失常的发生的作用,其可以做为上段食管癌重症患者的一种预防围手术期并发症的方式.     

On the Role of Goal Orientation Traits and Self-Efficacy in the Goal-Setting Process: Distinctions That Make a Difference

We conducted a field study to investigate how goal orientation traits and two variants of self-efficacy affect the goal-setting process and, in turn, performance. Participants were 255 college students enrolled in psychology or biochemistry courses at a large east-coast university in the People's Republic of China. Structural equation modeling analyses largely supported the argument that self-efficacy defined as a trait interacts with goal orientation traits, whereas self-efficacy defined as a state mediates the trait effects in the goal-setting process. The specific Trait × Trait interaction form was consistent with Dweck's original goal orientation theory and Brockner's behavior plasticity theory.