序列反应时任务中内隐和外显学习表征方式的实验研究

采用改进的序列反应时任务,探讨内隐和外显学习的知识表征方式,发现内隐组和外显组被试都习得了一定的序列规则.内隐组对标准字母的反应显著快于知觉偏差,而后者则又显著快于对动觉偏差字母的反应;外显组对标准字母的反应显著快于知觉偏差和动觉偏差,而后两者之间则没有区别.以上结果表明外显和内隐学习中知觉表征和动觉表征都起作用,不过在内隐学习中动觉表征起的作用更大.     

科学思维的心理学探索

科学思维的心理学研究起源于发展心理学的研究传统,在最近三十年不断拓展.本文首先回顾了在科学思维研究的发展过程中,其研究框架和模型的变化;进而阐述了近来科学思维研究所使用的典型实验范式;最后从发展、个体差异、专家新手比较以及教学干预这四个角度综述了近来一些科学思维的心理学研究成果,并探讨了这一领域未来的研究方向.     

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.     

Treadmill exercise enhances passive avoidance learning in rats: the role of down-regulated serotonin system in the limbic system

While serotonin (5-HT) may impair learning and memory, exercise has been reported to improve them. Whether chronic exercise can facilitate fear memory via regulating the serotonin system is unknown. We examined the effects of 4-week treadmill exercise training on levels of 5-HT and its metabolite 5-hydroxyindoleacetic acid (5-HIAA), the protein expression of its receptor 5-HT_1A and transporter in the amygdala, hippocampus and prefrontal cortex of male Sprague–Dawley rats. Our results demonstrated that treadmill exercise (1) improved the passive avoidance learning performance; (2) decreased the 5-HT level in the hippocampus; (3) decreased the expression of 5-HT_1A receptor in the amygdala without altering the transporter expression. Moreover, pretreatment with 0.1 mg/kg 8-hydroxy-di-n-propylamino tetralin, a selective 5-HT_1A receptor agonist, impaired the passive avoidance performance and completely abolished the exercise-enhanced fear memory. Our results suggest that down-regulation of the 5-HT system in the limbic system, i.e., the reduction of the hippocampus 5-HT content and the amygdala 5-HT_1A receptor expression, may be involved in the exercise-enhanced fear memory.     

十七大精神与社会正义

十七大报告中八个地方专门提到公平正义的用语,并且明确指出,实现社会公平正义是中国共产党人的一贯主张,是发展中国特色社会主义的重大任务.报告中从社会发展一般目标到具体的制度体制设计对什么是社会主义初级阶段的公平正义的内涵和怎样达致公平正义的目标作了具有时代特征的科学阐释,具有重大的理论和实践意义.     

重估测谎决策的Bayes推断试验

谎与非谎的情绪反应没有独立的客观标准,以Polygrapy构成技术的测谎缺乏稳定的效度。本研究尝试运用Bayes方法分析一项实测案例,计算两名被试的低显性测谎反应结果,使准确判决有谎的概率由机会水平50％分别调整到可明确分辩的74％和49％,从决策分析角度为改良测谎程序和提高测谎效率提供了一种新的操作思路。     

群体关系与问责对信息共享意愿及谈判行为的影响研究

本研究就国人的群体关系与问责对谈判者行为及信息共享意愿进行考察,试图探讨文化对谈判者的影响。通过对128名在校大学生的模拟谈判实验,发现谈判者在群内谈判比在群际谈判时有更高的信息共享意愿和更少的强硬行为,群体关系和问责对信息共享意愿及主观利益冲突有交互效应。具体而言,高度问责时,谈判者在群内谈判比群际谈判时有更多的信息共享意愿;低度问责时,谈判者在群内谈判比群际谈判时有更少的主观利益冲突。     

伦理学的历史感、时代性和开放性——马克思主义理论研究和建设工程《伦理学》教材编写课题组专家咨询会综述

马克思主义理论研究和建设工程<伦理学>教材编写课题组自2008年7月成立以来,已四月有余.四个多月以来,课题组成员在对伦理学的一些基本理论问题进行充分探讨并达成基本共识的基础上,按照教材编写的知识规范性暨完备性、学理逻辑性和学术科学性之基本要求,明确了提纲由三大板块,即基本理论、规范体系、道德实践构成,包括"导论"和十四章具体内容.     

心理学的繁荣与国家政策的影响

国家政策是国家在一定历史时期根据社会发展所做出的一系列的方针政策,它可以反映一个国家的意识形态,同时也影响着这一时期学术思想的倾向。通过考察心理学在美国临床心理学、社区心理学、教育心理学和经济心理学领域的形成和发展,探讨了国家政策对心理学发展的深远影响。当前的社会发展对心理学的需求越来越高,这对心理学的发展是一个很好的机遇,国家政策的支持将促进心理学的飞跃和发展。