高等医学院校医事法学教育亟待加强

通过千余份问卷调查研究,透视出医学生对医事法律认知程度普遍偏低的状况,进而从医学院教育方针,以及医学生法律意识、自我教育能力等方面,分析、探究原因,寻求改进医事法学教育滞后问题,加速培养学医懂法医学人才的途径与方法.     

机械通气的基本原理

机械通气是危重病人重要的支持手段,其重要目的是改善低氧血症、支持肺泡通气、降低呼吸功,并维持或增加肺容积.目前有多种呼吸模式,可根据患者情况选择.机械通气时,应认真评估气道压力、吸呼比、呼气末正压和吸入氧浓度对病人的影响.吸入氧浓度和平均气道压是决定氧合的关键因素,而肺泡通气量主要决定二氧化碳的排除.为防止呼吸机相关性的肺损伤,应将气道平台压维持在30cmH2O以下.     

Transient covert attention does alter appearance: a reply to Schneider (2006)

We recently demonstrated that transient covert attention increases the apparent contrast of a stimulus (Carrasco, Ling, & Read, 2004). Schneider (2006) proposes that the observed increase in apparent contrast is largely due to sensory interactions occurring between the precue a nd stimulus,rather than to attention. Specifically, hereports that cuing effects only occur at contrasts ne ar detection threshold, and that there a re confounding sensoryinteractions between the cue and stimulus at suprathreshold detection contrasts. Our response is twofold. First, we outline the key methodological differences between our original study and Schneider's that are likely to account for the different results, and explain how we had ruled out the sensory interaction explanation of the cue. Second, we directly test the prediction put forth by Schneider. If the effects were due to sensory interactions, reversing the luminance polarity of the precue in our paradigm should lead to differential cuing effects. We replicate one of the experiments of our original study and add a condition in which the cue luminance is either black or white. Our results replicated our previous findings-they showed an increase in apparent contrast to a high-contrast stimulus when it was precued. Moreover, we found that the black cue and the white cue had the same effect, thus ruling out the alternative explanation proposed by Schneider. Transient attention does alter contrast appearance.     

Hippocampal long-term potentiation, memory, and longevity in mice that overexpress mitochondrial superoxide dismutase

Superoxide has been shown to be critically involved in several pathological manifestations of aging animals. In contrast, superoxide also can act as a signaling molecule to modulate signal transduction cascades required for hippocampal synaptic plasticity. Mitochondrial superoxide dismutase (SOD-2 or Mn-SOD) is a key antioxidant enzyme that scavenges superoxide. Thus, SOD-2 may not only prevent aging-related oxidative stress, but may also regulate redox signaling in young animals. We used transgenic mice overexpressing SOD-2 to study the role of mitochondrial superoxide in aging, synaptic plasticity, and memory-associated behavior. We found that overexpression of SOD-2 had no obvious effect on synaptic plasticity and memory formation in young mice, and could not rescue the age-related impairments in either synaptic plasticity or memory in old mice. However, SOD-2 overexpression did decrease mitochondrial superoxide in hippocampal neurons, and extended the lifespan of the mice. These findings increase our knowledge of the role of mitochondrial superoxide in physiological and pathological processes in the brain.     

国外乐观研究述评

乐观是积极心理学研究中的核心概念之一。综观国外有关乐观的研究成果,认为乐观是一个与个体的未来定向密切相关的概念,是影响人的身心健康的重要因素。主要介绍了有关乐观的概念,包括乐观的期望-价值模型论,人格特质论和解释风格论;单因素、二因素、三因素和等级模型的心理结构;以及相应的测量方法。在中国文化背景下有关乐观的神经生物学基础的研究和乐观对人的身心健康的影响机制的研究是未来的研究趋向     

心理账户：理论与应用启示

“心理账户”是人们在心理上对结果（尤其是经济结果）的编码、分类和估价的过程,它揭示了人们在进行（资金）财富决策时的心理认知过程。心理账户的理论成果主要集中在“非替代性”的本质特征以及特殊的心理运算规则,心理账户在各个应用领域的研究成果主要包括：价格感知;行为资产组合理论;行为生命周期理论以及消费预算的研究。未来将在多元化研究方法的基础上,开展跨文化研究,对心理账户的内在心理机制和认知规律深入探讨     

多重情绪智力量表(MEIS)的信度、结构效度及应用评价研究

对多重情绪智力量表（MEIS）的信度和结构效度进行了实证检验,结果发现,MEIS的内部一致性信度（a）系数偏低,各分量表的分半信度系数很低;MEIS总量表的结构效度明显不足,对七个分量表的因素分析结果显示,每个维度对总量表的贡献率很低;无法满足Mayer和Salovey情绪智力4维度理论框架。对4个维度逐一进行二阶因素分析结果均揭示,MEIS明显缺乏每个维度所设定的4因素的结构效度,项目效率明显不足,因此,MEIS尚不具备有效测量情绪智力的功能。     

企业培训中员工的学习动机与学习策略的探讨

本研究在研制学习过程问卷的基础上,探讨了航修企业员工培训中学习动机与学习策略的匹配关系。研究表明:(1)学习方式包括学习动机和学习策略两个成分;(2)实用型学习动机的员工倾向于采用实用型学习策略,而应付型学习动机的员工倾向于采用应付型学习策略。这一结果证实了Marton等人关于学生的学习动机决定其学习策略的理论。     

教师组织公民行为与学校效能的关系研究

采用自编教师组织公民行为问卷和我国台湾学者陈信君编制的学校效能问卷,对301名中小学教师进行问卷调查。结果表明：①高级职称教师的组织公民行为高于低级职称教师;②省一级学校教师的组织公民行为高于市一级学校教师,而市一级学校教师的组织公民行为高于区一级学校教师;③教师组织公民行为与学校效能之间存在着显著的正相关;④教师组织公民行为的学校认同、责任意识和利他行为因素对学校效能有着显著的预测作用。     

海洛因依赖者抑制控制功能的损伤机制及其可逆性

抑制控制障碍是海洛因依赖者认知功能受损的核心问题, 是影响复吸的关键因素。大量研究证实了海洛因依赖者抑制控制功能的受损, 并且发现长期药物滥用者额叶、前扣带回皮层、中脑腹侧被盖区、伏隔核、脑岛等相关脑区活动存在异常。以往研究表明海洛因依赖者抑制控制功能受损是一种持久性的、不可逆的脑损伤, 但最近一些研究却提供了毒品戒断者抑制控制功能生物性恢复的证据。未来的研究应该更加关注多重冲突条件下海洛因依赖者抑制控制功能的研究, 并且在戒毒实践中根据海洛因戒断者自身特点进行区分性治疗。