20—36.5米氮氧饱和及50-70米空气巡回潜水模拟实验的神经和心理功能研究

人体呼吸高分压氮气时会发生麻醉现象,出现欣快、动作不协调、判断迟钝等。氮分压愈高,症状愈明显。Bennett等在30米空气暴露时定量地测到有效行为的障碍。Elcombe等在4个绝对压含5.2％氧的氮氧混合气饱和暴露时,也观察到智力和行为的     

4—9岁儿童逻辑推理能力的研究——对J.Piaget某些实验的验证

本文是对皮亚杰“物体守恒”实验的验证。从而探讨了4—9岁儿童在形成守恒概念中的逻辑思惟发展过程,为编制智力测验量表提供了有关参考数据。     

不同月龄小鼠行为训练与脑突触蛋白的相关性研究

不同年龄动物在各种行为实验中表现出学习记忆能力不同。一般地说,动物进入中年期以后,记忆保持力(retention)随年龄增长而下降。有关衰老性记忆障碍与脑内神经细胞变化的相关性已有大量观察记载,但中、幼年阶段的记忆力差异及其脑内突触机制     

家庭支持型主管行为对员工的影响与作用机制：基于元分析的证据

为厘清家庭支持型主管行为对员工的独特影响,并比较不同的作用机制,本研究对包含204个独立样本、340个效应值及91145名员工的164篇文献进行了元分析,结果发现：(1)与一般主管支持行为相比,家庭支持型主管行为对员工的任务绩效、创新行为和生活满意度有更强的积极影响。(2)工作对家庭冲突(资源视角)、领导-成员交换(交换视角)和情感承诺(情感视角)均能解释家庭支持型主管行为对员工的作用机制,并互为补充。具体而言,三者均能中介家庭支持型主管行为对任务绩效的影响;领导-成员交换和情感承诺在家庭支持型主管行为与创新行为间起中介作用;工作对家庭冲突和领导-成员交换则在家庭支持型主管行为影响生活满意度中发挥中介效应。研究结果为家庭支持型主管行为的影响效果提供了可靠结论,也有助于深入理解其作用机制。     

注意缺陷多动障碍-发展性阅读障碍共患儿童的干预效果及其内在机理

注意缺陷多动障碍和发展性阅读障碍是两类常见的儿童神经发育障碍, 二者共患率高达25%~48%。共患问题不仅使儿童自身面临着严重的认知、行为和心理损害, 还给家庭、学校和社会带来了沉重的负担, 对共患儿童的干预是极为必要且重要的。以共患病理机制假说为基础, 可将既往共患儿童的干预研究划分为以下两大类：(1)基于表型假说的干预方案, 如药物干预、阅读干预以及二者联合干预, 相应方案干预效果的迁移性和稳定性均有待深入考究; (2)基于共同缺陷假说的干预方案, 如针对核心共同认知缺陷之一的加工速度问题的干预已初显成效, 但相关研究较少, 干预效果需更多研究进一步系统性地考察。最后就共患儿童的干预方案现状进行了反思和展望。     

Smartphone use and daily cognitive failures: A critical examination using a daily diary approach with objective smartphone measures

While smartphones have brought many benefits and conveniences to users, there is continuing debate regarding their potential negative consequences on everyday cognition such as daily cognitive failures. A few cross-sectional studies have found positive associations between smartphone use and cognitive failures. However, several research gaps remain, such as the use of cross-sectional designs, confounds related to stable individual differences, the lack of validity in self-report measures of smartphone use, memory biases in retrospective self-reports, and the lack of differentiation between smartphone checking and smartphone screen time. To simultaneously address the aforementioned shortcomings, the current study examined the within-person associations between various objective indicators of smartphone use and daily cognitive failures using a 7-day daily diary study. Multilevel modelling revealed that smartphone checking, but not total smartphone screen time, predicted a greater occurrence of daily cognitive failures at the within-person level. Surprisingly, we also found negative within-person associations between smartphone screen time for social- and tools-related applications and daily cognitive failures, suggesting that some types of smartphone use may temporarily benefit one's cognitive functioning. This finding demonstrates the importance of studying the specific functions of smartphone use and their differential cognitive consequences, as well as highlights the complex relations between smartphone use and cognition.     

Blunted reward responsiveness prospectively predicts emotional distress when exposed to a naturalistic stressor

Both stress and blunted reward responsiveness have been identified as core risk factors of depression. Whether blunted reward responsiveness increases psychological vulnerability to real-life stress from a dynamic perspective (from stress reactivity to recovery) has not been investigated. By utilizing a real-world stressful event (i.e. the final examination), this study aimed to explore the role of reward responsiveness in the stress-emotional distress relationship during stress reactivity and recovery phases. We followed 57 undergraduates with three assessments, from six weeks before examination weeks (T1, baseline), one day before the examinations (T2) to two weeks after the examinations (T3), therefore, covering stress reactivity (T1 to T2) and recovery (T2 to T3) phases. At baseline, reward responsiveness was measured as the Reward Positivity (RewP) in the doors task. Stress and emotional distress (anxiety and depression) were reported at T1, T2 and T3 to capture their dynamic changes. Results showed that self-report stress levels significantly increased from T1 to T2 (stress reactivity phase) and decreased from T2 to T3 (stress recovery phase). Furthermore, blunted reward responsiveness at baseline prospectively predicted emotional distress during the stress reactivity phase but not the recovery phase. Specifically, during the stress reactivity phase, higher perceived stress was associated with greater anxiety and depression only in participants with relatively smaller residual RewP amplitudes but not in participants with relatively larger residual RewP amplitudes. Our study demonstrated that a blunted reward responsiveness is a vulnerable factor of depression, especially when exposed to stress. Our findings provide insights into prevention and intervention for stress-related disturbance.     

儿童汉字读音声旁一致性意识的发展

采用同音判断的方法,考察儿童对汉字读音声旁一致性意识的发展。一个熟悉字和一个不熟悉字共用同一个声旁,该声旁在提示整字发音时可以是一致的,即包含此声旁的所有汉字都发音相同,也可以是不一致的。要求儿童猜测不熟悉字的读音,作出它与熟悉字“是”、“否”同音的判断。结果发现,儿童很早就意识到汉字的结构以及声旁和形旁在表音、表义功能上的分工。随着年级的升高,声旁一致性对猜测不熟悉汉字读音的影响增强。小学四年级语文能力较高的儿童已经开始意识到声旁的一致性;六年级儿童总体上说来已发展了一致性意识。初二年级的学生发展了声旁一致性意识,且没有能力差异。大学生的声旁一致性意识最强。     

生物芯片技术与缩微实验室

基于微加工技术发展起来的生物芯片,可以把成千上万乃至几十万个生命信息集成在一个很小的芯片上,对基因、抗原和活体细胞等进行分析和检测。用这些生物芯片制作的各种生化分析仪和传统仪器相比较具有体积小、重量轻、便于携带、无污染、分析过程自动化、分析速度快、所需样品和试剂少等诸多优点。这类仪器的出现将给生命科学研究、疾病诊断和治疗、新药开发、生物武器战争、司法鉴定、食品卫生监督、航空航天等领域带来一场革命。