积极情绪和消极情绪的大脑反应差异研究综述

情绪的产生通常伴随着相应的生理变化。积极情绪和消极情绪在进化过程中具有不同的适应意义,形成了不同的生理反应。该文综述了积极情绪和消极情绪在大脑中的反应差异,归纳了相关的研究结论和存在的争论,并指出寻找敏感情绪指标、脑功能定位、情绪调节等三个方向可能会在未来几年显著的推动情绪研究的进步。     

青少年学生疏离感的理论构建及量表编制

通过文献分析和实证研究 ,构建了疏离感的理论维度 ,并据此编制了青少年学生疏离感的测量量表。对量表进行探索性因素分析和验证性因素分析后表明 :疏离感是一个多层次、多维度的体系 ,本身包含 2个层次和 9个维度 ,该研究所构建的疏离感理论体系比较合理。疏离感量表具有较好的信度和效度 ,可以作为青少年学生疏离感研究的测量工具     

复习对正确记忆和虚假记忆的影响

大量研究表明,复习对正确记忆和虚假记忆有不同影响。对于正确记忆,保持量随学习次数的增加而增加,但对于虚假记忆,目前的研究结论并不一致。该文综述了近年来关于复习对正确记忆和虚假记忆不同影响的研究,并介绍了内隐激活反应假设和模糊痕迹理论对这一问题的解释     

条件性味觉厌恶分化后臂旁核c-fos表达的变

以口内注入糖精或蔗糖溶液为条件刺激,腹腔内注射LiCl为非条件刺激,在大鼠形成条件性味觉厌恶后进行分化训练,观察味质和嗜好性对臂旁核各亚核c-fos表达的影响及其交互作用。结果表明：味质和嗜好性对背侧外侧亚核(dls)和腹侧外侧亚核(vls)的c-fos表达无影响;在内侧外侧亚核(ils)和外部内侧亚核(ems),蔗糖诱导的c-fos表达高于糖精,但在外部外侧亚核(els),糖精诱导的表达高于蔗糖;嗜好性刺激引起ils、中央外侧亚核(cls)和cms内c-fos高表达,厌恶性刺激引起ems和els内的高表达。在ils和cms嗜好性与味质的影响各自独立,在els和ems内嗜好性与味质的影响存在交互作用。提示PBN内存在味质辨别和报酬评价的代表区,两种代表区有交迭,ems和els对味质信息和报酬信息的整合有重要作用     

数字加工的脑功能成像研究进展及其皮层定位

数字加工是人类最重要的认知功能之一。当前的脑功能成像研究有助于对数字加工与皮层之间的联系进行更精确的定位。基于对上世纪80年代来有关数字加工脑功能成像研究的主要成果的回顾,尤其是一些重要区域,如双侧顶叶与前额叶等在数字加工中的地位与作用,以及不同脑区之间的关系进行了探讨,并对一个广泛运用的数字加工神经机制模型进行了简要评述。在此基础上,对数字加工的皮层定位问题进行了简要的总结。     

儒家真精神——“时中”

儒家时中是中和世界观和中庸方法论的统一 ,时中的内涵实质在依时而中、与时俱进 ,儒家的时中观包涵着深刻的唯物辩证思想 ,包含着强烈的适应进取精神 ,蕴涵着鲜明的知识理性内容。时中是儒家的真精神 ,是中华民族的真精神 ,是今天实现中华民族伟大复兴的真精神。     

A virtual reality assessment and training system for unilateral neglect.

Patients with unilateral neglect have problems reporting, responding, or orienting to novel or meaningful stimuli that is presented to the side opposite to that of a brain lesion. This creates a serous problem in regards to daily living activities. However, the established methods for assessing and training of unilateral neglect patients have several deficits. Recently, virtual reality (VR) technologies have been used as an assessment and treatment tool for rehabilitation. Hence, this study designed a VR system to assess and train unilateral neglect patients. In addition, the suitability and feasibility of our VR system for unilateral neglect patients was verified.     

Neurofeedback training with virtual reality for inattention and impulsiveness.

In this research, the effectiveness of neurofeedback, along with virtual reality (VR), in reducing the level of inattention and impulsiveness was investigated. Twenty-eight male participants, aged 14-18, with social problems, took part in this study. They were separated into three groups: a control group, a VR group, and a non-VR group. The VR and non-VR groups underwent eight sessions of neurofeedback training over 2 weeks, while the control group just waited during the same period. The VR group used a head-mounted display (HMD) and a head tracker, which let them look around the virtual world. Conversely, the non-VR group used only a computer monitor with a fixed viewpoint. All participants performed a continuous performance task (CPT) before and after the complete training session. The results showed that both the VR and non-VR groups achieved better scores in the CPT after the training session, while the control group showed no significant difference. Compared with the other groups, the VR group presented a tendency to get better results, suggesting that immersive VR is applicable to neurofeedback for the rehabilitation of inattention and impulsiveness.     

Computer‐assisted learning for adults with profound multiple disabilities

Five adults with profound physical and intellectual disabilities were taught to respond to photographs of preferences embedded in Microsoft PowerPoint (Microsoft, 1997 ) presentations by operating microswitches that functioned as mouse clicks. Rate of responding was generally correlated with changes in types of presentation, although variability in rate was often high, and session durations were quite short. Two participants showed substantial increases in responding when fitted with switches that were easier to manipulate. This exploratory study demonstrates that people with extremely limited physical and cognitive abilities can be taught to operate switches that produce changes in visual arrays on a computer screen and sometimes differentially so. Implications for responding to photographic representations of preferences, rather than the tangible preferences themselves, are discussed. Copyright © 2004 John Wiley & Sons, Ltd.