The neural basis of insight problem solving: an event-related potential study

The electrophysiological correlates of successful insight problem solving (Chinese logogriphs) were studied in 18 healthy subjects using high-density event-related potentials (ERPs). A new experimental paradigm (learning-testing model) was adopted in order to make subjects find a solution on their own initiative rather than receive an answer passively. Results showed that Successful guessed logogriphs elicited a more positive ERP deflection (P200-600) than did Unsuccessful guessed logogriphs in the time window from 200 to 600 ms after onset of the stimuli. Subsequently Successful logogriphs elicited a more negative ERP deflection than did Unsuccessful logogriphs in the time windows of 1500-2000 ms (N1500-2000) and 2000-2500 ms (N2000-2500). Maps of the P200-600 showed strong activity in the midline parieto-occipital scalp regions. Dipole analysis localized the generator of P200-600 in the left superior temporal gyrus and parietotemporo-occipital cortex areas. The N1500-2000 and N2000-2500 had a distinct activation over left frontal scalp regions. Dipole analysis localized the generator of the N1500-2000 in the anterior cingulate cortex (ACC) and the N2000-2500 in the posterior cingulate cortex (PCC). This result indicates that the parietotemporo-occipital cortex areas might be involved in forming rich associations in the early stage of successful logogriph solving. Then, the ACC might play an important role in the breaking mental set and the forming of novel associations. At last, "Aha" feeling might activate the PCC.     

Violent and disruptive behavior among drug-involved prisoners: relationship with psychiatric symptoms

This study examines the relationship between psychiatric symptoms and violent/disruptive behavior among 192 inmates who participated in prison-based substance abuse treatment. Participants came from two sites able to provide narrative reports of disciplinary actions in the Criminal Justice Drug Abuse Treatment Studies' Co-Occurring Disorders Screening Instrument study. In multivariate logistic models, a lifetime history of thought insertion/control ideation (OR, 11.6; 95% CI, 1.8-75.2), antisocial personality disorder (OR, 3.3; 95% CI, 1.2-8.9), and disciplinary action related to possession of controlled substances or contraband (OR, 4.9; 95% CI, 1.9-12.3) were associated with increased risk for violent or disruptive behavior while in prison, whereas lifetime phobic symptoms (OR, 0.2; 95% CI, 0.1-0.54) and high school graduation (OR, 0.4; 95% CI, 0.2-1.0) were associated with a decreased risk of violence and disruptive behavior in general. We conclude that, among inmates in substance abuse treatment, symptoms that increase risk for violence or disruptive behavior include thought control/insertion ideation and disciplinary infractions related to controlled substances, contraband, or failure to participate in assigned programs, as well a history of antisocial personality disorder.     

高校教师工作家庭关系、工作特征与生活满意度的研究

该研究通过对1149位高校教师的问卷调查,探讨了高校教师工作家庭关系的特点及其与工作特征、生活满意度的关系.结果发现:1)高校教师体验到的工作家庭冲突与工作家庭促进存在较弱的负相关.2)男性教师体验到的家庭-工作冲突显著高于女性教师,在工作-家庭冲突和工作家庭促进方面差异不显著.3)工作要求能正向预测工作家庭冲突和工作家庭促进;个人对工作家庭平衡的控制感能降低工作-家庭冲突、提升工作家庭促进,但同时也会使家庭-工作冲突增加.4)工作家庭促进会显著地提升教师对工作和家庭的满意感.工作-家庭冲突会削弱工作满意度,家庭-工作冲突则会导致家庭满意度下降.     

序列学习的ERP研究综述

对近些年国外序列学习的ERP研究进行了总结.序列学习研究选取的ERP成分主要包括N200、P300、CNV、LRP、ERN、MMN等;关注的问题主要集中在意识与序列学习的关系、序列学习的表征问题以及序列学习中一些相似ERP成分的差异等方面.     

工作记忆和句法复杂性对汉语判断单句的影响

采用自控步速移动窗口技术,研究了言语工作记忆与句法复杂性对汉语判断单句加工的影响.实验结果表明:汉语判断单句语义提取和命题表征受句法复杂性和言语工作记忆容量的影响;加工模式上,结构相同但句法难度不同的判断单句存在相同的语义焦点;句子-图片验证过程中,高容量者受句法难度、语义失配影响较小,验证时间显著短于低容量者.     

Purple sweet potato color repairs d-galactose-induced spatial learning and memory impairment by regulating the expression of synaptic proteins

Purple sweet potato color (PSPC), a class of naturally occurring anthocyanins used to color food (E163), has been reported to possess a variety of biological activities, including anti-oxidant, anti-tumor, and anti-inflammatory. The effect of PSPC on the spatial learning and memory of mice treated with d-galactose (d-gal) was evaluated by the Morris water maze; d-gal-treated mice had decreased performance compared with mice in the vehicle and PSPC groups, while the PSPC + d-gal group showed significantly shortened escape latency to platform, increased swimming speed, more target quadrant search time and more platform crossings as compared with the d-gal group. Brain functions, such as memory formation and recovery of function after injury, depend on proper regulation of the expression levels of the pre- and post-synaptic proteins. We investigated the expression of four pre-synaptic proteins (growth-associated protein-43, synapsin-I, synaptophysin, and synaptotagmin) and two post-synaptic proteins (post-synaptic density protein-95 and Ca²⁺/calmodulin-dependent protein kinase II) in the hippocampus and cerebral cortex, respectively, in response to different treatments. Western blotting analysis showed that there were significant decreases in the expression of these representative synaptic proteins in the hippocampus and cerebral cortex of d-gal-treated mice. Interestingly, these decreased expression levels of synaptic proteins could be reversed by PSPC. The levels of expression of these representative synaptic proteins in mice treated with PSPC alone were not significantly different from those in untreated mice. The results of this study suggested that memory impairment and synaptic protein loss in d-gal-treated mice may be improved by treatment with PSPC.     

Affect- and role-based loyalty to supervisors in Chinese organizations

A study conducted in a Taiwanese financial services company revealed that affect- and role-based loyalty are two distinct types of loyalty to supervisors. The ethical behaviour of supervisors, perceived supervisor support, interpersonal justice, and respect for hierarchy predicted affect-based loyalty, whereas only interpersonal justice and respect for hierarchy predicted role-based loyalty to the supervisor. Affect-based loyalty had a more positive correlation with supervisory satisfaction than did role-based loyalty, and role-based loyalty had a more positive correlation with extra-role performance and attendance than did affect-based loyalty.     

条件推理中无效推断被抑制的ERP研究

采用ERP技术探讨提供替代条件时,无效推断(AC、DA)被抑制的神经机制.实验结果表明:在200～800ms,AC和DA比基线任务的波形有一个更加负性的偏移,差异波和地形圈分析表明,在200-300ms,AC、DA在头皮前部的额、额中央、中央顶有明显的N250;在300～800ms,AC和DA在头皮后部中央叶、中央顶、顶叶诱发更加明显的晚负成分.从时间进程看,AC、DA推断过程表现为从头皮前部额叶皮层到头皮后部的顶叶皮层的动态变化,这一结果支持了演绎推理的三阶段模型理论.     

微生物与行为和精神疾病

病原微生物能够影响宿主的大脑和行为, 甚至诱发精神疾患。肠道细菌可影响小鼠的神经系统发育和行为模式的发展。慢性胃肠病、慢性疲劳综合征等生理疾病中的行为改变与微生物有关; 肝性脑病、多发性硬化等中枢神经系统生理疾病也可能由微生态改变引起; 抑郁症、孤独症等精神疾病与肠道细菌状态和比例有关; 卫生假说支持上述观点。建立良好的共生微生物平衡有利于人类身心健康。可以预期, 共生微生物与身心健康的关系将是今后心理学研究的关注热点。     

幸福观取向理论建构及实证

摘 要 尝试用新的理论视角-取向研究视角,对幸福观进行整合研究,建构一种与社会情境结合更紧密,更具概括性的幸福观取向理论。幸福观取向理论的假设建构模型包括四种幸福观取向维度：社会取向,个人取向,积极取向和消极取向。根据理论模型编制幸福观取向量表,以907名被试为研究对象,运用探索性因素分析和验证性因素分析方法对该理论模型进行实证研究。结果证明了该理论建构中各维度的因素负荷和拟合指数良好,幸福观取向量表显示出良好的信度和建构效度,保证了实证研究的有效性。