高中生物理和化学学科中同伴学业支持与学业情绪的关系:学习效能感的中介作用和性别的调节作用

研究发现学习效能感会受到同伴支持的影响,同时它又是影响学生学业状况的重要前因变量。根据控制价值理论,本研究通过对3329名高一和高二学生的调查,考察在物理和化学学科中,学习效能感是否会在同伴学业支持和学业情绪中起到中介作用。发现：(1)同伴学业支持和学习效能感呈显著正相关;两者与高兴学业情绪显著正相关,与厌倦学业情绪显著负相关;(2)在控制了年龄、年级、性别和地域后,学习效能感在同伴学业支持和高兴学业情绪中起部分中介作用,在同伴学业支持和厌倦学业情绪中起完全中介作用;(3)在物理学科中,性别调节了学习效能感和学业情绪的关系。本研究验证并拓展了控制价值理论,对于如何提高中学生物理和化学学习的积极情绪有借鉴意义。     

长期高策略性技能训练对运动员大脑白质结构的影响：一项DTI研究

目前关于运动员经验优势的脑机制还存在争议, 尤其对于涉及较多认知过程参与的高策略性技能项目运动员, 其大脑白质结构可塑性变化还需进一步探究。研究横向对比了乒乓球运动员和非运动员大脑白质纤维束的弥散张量成像数据。结果发现, 相比于非运动员, 乒乓球运动员在连接背侧和腹侧通路脑区的双侧皮质脊髓束、左侧上纵束、左侧下纵束和双侧额枕下束的各向异性值(FA)更大, 进一步分析发现, 部分腹侧通路白质纤维束FA增加的原因是径向扩散系数(RD)下降。研究结果支持了动作双通路模型。提示经过长期高策略性技能训练, 乒乓球运动员在背侧和腹侧通路上的白质纤维束结构完整性增强。     

技术信任和领导信任对企业员工新技术接受的影响

在当今知识经济时代, 新技术的采用对于企业提高核心竞争力至关重要。如何使员工面对新技术带来的风险和不确定性, 信任并接受新技术是企业新技术推广的重要问题。现今学界虽已关注到信任在新技术采用这一过程中的积极作用, 但仍缺乏相关的理论和实证研究, 特别是对于其内在心理机制的解释。为弥补这一研究的不足, 本研究通过分析企业新技术推广情境下, 技术信任和领导信任对员工新技术接受的影响, 并引入了感知风险性与技术自我效能感作为中介变量, 探寻信任影响的内在机制。此外, 还进一步探讨企业文化的调节作用, 从而建构信任与企业员工新技术接受的理论模型, 为企业新技术的推广提出合理建议。     

Semantic diversity in paired-associate learning: Further evidence for the information accumulation perspective of cognitive aging

Psychonomic Bulletin & Review - Normal aging is often associated with a performance decline on various cognitive tests, including paired associate learning (PAL), where participants are asked...     

论马克思主义的整体性(上)

近年来,随着 "马克思主义理论"被正式确立为国家一级学科,"马克思主义学院"在全国高等院校纷纷成立,国内马克思主义研究在表面上也呈现出一派热闹非凡的景象。于是马克思主义的整体性问题被提了出来。然而,与这种表面上热闹的景象形成鲜明对照的是,真正从心灵深处认同、信仰马克思主义的人并不很多。这种悖论式的现象不能不引起我们足够的重视。对于研究马克思主义的理论工作者而言,必须对眼前令人眼花缭乱的马克思主义 "热"进行 "冷"思考,就是说,必须认真地、郑重地提出并弄清这样一个问题: 马克思主义就其本义而言,是站在大众立场、为大众立言、为     

基于概念辨析的类比推理研究的新视角

该研究从概念的辨析上着手,不仅可以在相似的多个概念上理清各自的异同,更重要的是分析得出,作为科学发现和创造性思维的核心———类比推理(狭义类比推理),它有着不同于一般思维活动中的类比推理(广义类比推理)的特点。在此基础之上,才能更好地揭示其发生的规律,以利于更进一步的实证研究。     

Healthcare sector reform and its influence on public hospitals in mainland China

The government has launched the healthcare sector reform since the 1980s. From the beginning, the reform has been controversial. What is then the real purpose of the reform? Is it only to reduce the government's burden of health care or establish a just and effective healthcare system? Can healthcare be geared by the market or should the government play a guiding role in it?     

Cognitive disruption and altered hippocampus synaptic function in Reelin haploinsufficient mice

The heterozygote reeler mouse (HRM) shows many neuroanatomical and biochemical features that are also present in some human cognitive disorders, such as schizophrenia. In the present study, hippocampal dependent plasticity and cognitive function of the HRM were characterized in detail in an attempt to reveal phenotypic functional differences that result from Reelin haploinsufficiency. The HRM and wild type mice show similar levels of overall activity, coordination, thermal nociception, startle responses, and anxiety-like behavior. In addition, both genotypes show similar shock threshold, identical cued freezing behavior and comparable spatial learning in Morris water maze tasks. However, a significant reduction in contextual fear conditioned learning was observed in the HRM. Electrophysiological studies in hippocampal CA1 synapses revealed a plethora of differences between genotypes. The HRM exhibits reduced field excitatory postsynaptic potentials in responses to similar synaptic inputs, lowered paired pulse facilitation ratio and impaired long-term depression and tetanus-induced long-term potentiation (LTP). Also, deficits were detected in LTP elicited by theta burst stimulation or by a whole cell pairing protocol. These physiologic differences could not be accounted for by changes in the overall amount of glutamate receptor subunits. In addition, it was determined that network-driven excitatory and inhibitory activities recorded in CA1 pyramidal neurons showed that the HRM had comparable amplitude and frequency of spontaneous excitatory postsynaptic currents, but a marked reduction in spontaneous inhibitory postsynaptic currents. Thus, the HRM exhibits a specific hippocampal-dependent learning deficit accompanied with a pronounced impairment of hippocampal plasticity and functional inhibitory innervation.     

Comparison of brain mechanisms underlying the processing of Chinese characters and pseudo-characters: an event-related potential study

Most Chinese characters are composed of a semantic radical on the left and a phonetic radical on the right. The semantic radical provides the semantic information; the phonetic radical provides information concerning the pronunciation of the whole character. The pseudo‐characters in the study consisted of different sub‐lexical parts of real Chinese characters and consequently they also had the semantic radical and the phonetic radical. But they were not readable and had no actual meaning. In order to investigate the spatiotemporal cortical activation patterns underlying the orthographic, phonological and semantic processing of Chinese characters, we used event‐related brain potentials (ERPs) to explore the processing of Chinese characters and pseudo‐characters when 14 healthy Chinese college students viewed the characters passively. Results showed that both Chinese characters and pseudo‐characters elicited an evident negative potential peaking around 120 ms (N120), which appeared to reflect initial orthographic distinction and evaluation. Then, Chinese pseudo‐characters elicited a more positive ERP deflection (P220) than did Chinese characters 200–250 ms after onset of the stimuli. It was similar to the recognition potential (RP) and might reflect the integration processes of phonological and semantic processing on the basis of early orthographic information. Dipole source analysis of the difference wave (pseudo‐characters minus characters) indicated that a generator localized in the left temporal‐occipital junction contributed to this effect, which was possibly related to phonological and perceptual–semantic information integration. Between 350–450 ms, a greater negativity (N360) in pseudo‐characters as compared to characters was found over midline fronto‐central scalp regions. Dipole analysis localized the generator of N360 in the right parahippocampal cortex. Therefore, the N360 might be an N400 component and reflect the higher‐level semantic activation on the basis of orthographic, phonological and perceptual–semantic processing.     

Differentiation of stages in joke comprehension: Evidence from an ERP study

This study aimed to investigate the mechanisms underlying joke comprehension using event‐related potentials (ERPs). Fourteen healthy college students were presented with the context of a story without its joke or nonjoke ending, and then, when the story ending was presented, they were asked to make a funny/unfunny judgment about these endings. The behavioral results showed that there was no significant difference between funny and unfunny items, which meant that subjects could understand funny items as easily as unfunny ones. However, the ERP results showed that funny items initially elicited a more negative ERP deflection (N350–450) over frontocentral scalp regions. Dipole analysis localized the generators in the left temporal gyrus and the left medial frontal gyrus; it is suggested that these areas might be involved in detecting the incongruent element in joke comprehension. Between 600 and 800 ms, funny items subsequently elicited a more negative ERP deflection (N600–800) over frontocentral scalp regions and a more positive ERP deflection (P600–800) over posterior scalp regions. Dipole analysis localized the generator in the anterior cingulate cortex (ACC), an area involved in the breaking of mental set/expectation and the forming of novel associations. Finally, funny items elicited a more positive ERP deflection (P1250–1400) over anterior and posterior scalp regions. Dipole analysis localized the generators in the middle frontal gyrus and the fusiform gyrus, areas that might be related to the affective appreciation stage in joke process. Unlike that of Coulson and Kutas (2001), the present study might support the hypothesis of a three stage model of humor processing (humor detection, resolution of incongruity and humor appreciation).