音乐知觉的神经基础：脑成像研究的元分析

本研究根据音乐加工的层级结构, 对现有的脑成像研究进行了元分析, 探讨了音乐知觉的神经基础。具体而言, 对特异于音乐知觉加工的两个层级, 音程分析和结构分析的神经基础进行了分析, 并在此基础上对比了参与两个层级加工的脑区。结果发现, 音程分析主要的激活分布在双侧颞上回和右侧额下回, 在中央前回、角回和脑岛等脑区也有分布。音程分析在颞上回激活最多, 可能表明颞上回为音程分析的核心区域。结构分析激活分布较广, 主要激活颞上回、颞横回和前额叶区域, 此外, 还激活了下顶叶、缘上回和舌回等顶枕区域。结构分析在前额叶激活最多, 可能表明前额叶为结构分析的核心区域。最后, 对比两层级激活的脑区发现, 二者仅在后侧颞上回存在着重合, 而在绝大部分脑区则表现出分离, 这暗示了音程分析和结构分析通过颞上回进行交流, 并负责音乐不同层面的加工。     

Mechanical behaviour of an Al–matrix composite reinforced with nanocrystalline Al-coated B4C particulates

In metal–matrix composites (MMCs), interfacial bonding between the metal matrix and the ceramic reinforcement plays a crucial role in their mechanical performance. In the present study, B₄C particles were cryomilled with an Al alloy to produce a composite powder, in which the B₄C was uniformly distributed in nanocrystalline Al. The cryomilling developed a strong bond between the B₄C and the Al, allowing the nanocrystalline Al to act as a coating with a strong ceramic–metal interface. This cryomilled composite powder was then introduced, as a reinforcement, into a conventional Al alloy to strengthen the material. After consolidation, the result was a bulk Al–matrix composite reinforced with B₄C particles encapsulated in nanocrystalline Al. This composite exhibits greatly improved strength and stiffness.     

影响视觉复合刺激中整体和局部性质加工的几种因素

文章研究了视知觉组织,空间位置不确定性和视野位置等因素对复合刺激中整体和局部性质加工的影响。实验发现,（１）当复合刺激呈现在白背景上时,反应时和干扰作用都表明复复合刺激中大图的加工优于小图,刺激位置的不确定削弱大图对小图的干扰作用;而当复合刺激呈现在由“＋”组成的背影或时,小图的加工优于大图,刺激位置的不确定延长分辩小图的ＲＴ;（２）与周国刺激相比,分辨视野中央的复合刺激的ＲＴ较短,这种影响对分辨     

Culture,gender and self–close‐other(s) connectedness in Canadian and Chinese samples

Founded upon the theories of Independent–Interdependent Self‐Construal and I–C, the main goal of this study was to test, via an adapted IOS Scale, whether Anglo‐Canadians were more independent than Mainland Chinese in construing their relationship with family members and friends. Strong cultural differences were found in self–family connectedness, but not in self–friends connectedness. Chinese were closer to their family members than Canadians, but Canadians were as close to their friends as Chinese. In both samples, gender difference was found in self–friends connectedness, but not in self–family connectedness. In the Canadian sample, females were closer to their friends than males, while in the Chinese sample, males were closer to their friends than females. In conclusion, this study contributes to the field in three ways. First, the finding that Canadians are as connected as Chinese to their close friends unprecedentedly contests one fundamental assumption of the theories of independent‐interdependent self‐construal (Markus & Kitayama, 1991 ) and I–C (Hofstede, 1980 ; Triandis, Bontempo, Villareal, Asia & Lucca, 1988 ) that individualists (e.g. Anglo‐Canadians) are more independent than collectivists (e.g. Chinese) on all dimensions of human relations. Second, the proposition (Cross & Madson, 1997 ) that Western males and females differ in the same way individualists and collectivists differ in their self‐construal is not supported. Finally, the adaptation of the IOS Scale proposes a refreshing direction in cross‐cultural research. Graphic representations may be less susceptible to cross‐cultural misconstrual than verbal statements since the former involves little or no translation from one language to another. Copyright © 2002 John Wiley & Sons, Ltd.     

高中生创造性思维发展特点的研究

选取110名高中生为被试,采用自编“中学生创造性思维测验”,考察了高中生创造性思维水平的年龄特点、性别差异以及学科成绩与创造性思维水平之间的相关.结果表明:(1)从创造性思维总分上看,高中生的创造性思维水平发展比较平缓,各年级间差异不显著;其中创造性思维最重要的品质——独特性:从高一到高二年级处于较为平稳的水平,二者无显著差异;高三比高二(P<001)和高一(P<0001)有显著提高;(2)高中学生的创造性思维不存在显著的性别差异;(3)中学生语文成绩与创造性思维总得分及部分项目得分有一定相关,与创造性思维的独特性及各项目上的独特性均无显著相关.数学成绩与创造性思维的诸方面均无显著相关.     

风险偏好预测中的性别差异和框架效应

11 8名大学生被试在得益和损失两种任务框架下对自己、其他男性和女性的风险偏好进行了预测。结果发现 ,被试在损失框架下对各类对象风险偏好的预测均高于得益框架 ,且都高估了男性的风险偏好 ,低估了女性的风险偏好。在损失框架下 ,女性被试对各类对象的风险偏好预测高于男性的预测。研究认为 ,性别原型知识、任务框架和即时情绪共同影响被试的风险偏好预测。     

多动症儿童与认知事件相关电位的实验研究

本研究通过对29名多动症(MBD)儿童与正常儿童认知事件相关电位各成份的比较,结果发现多动症组与正常儿童组在反映大脑认知功能P300潜伏期有明显的差异,从而说明P300可以作为检测多动症儿童的参考性的客观指标。     

文本结构和时间应激对网页阅读绩效的影响

探讨了文本结构和时间应激对网页阅读绩效的影响效应。采用 2× 3被试间设计 ,自变量为文本结构和阅读时间 ,因变量为找到相关信息的时间及途径的额外节点数。结果发现 ,主效应及交互作用的影响均十分显著。其中 ,当阅读时间为 10和 2 0min时 ,超文本阅读的绩效均显著低于线性文本 ,而在 30min时两者无显著差异 ;对超文本 ,三种阅读时间的效应存在显著差异 ,而对线性材料 ,阅读时间的效应无显著差异。结论 :时间应激对超文本阅读绩效的影响更为明显     

声旁类型与频率在汉字和部件识别中的交互作用

用识别整字和识别部件两种任务探讨两种声旁频率——组字频率和使用频率的作用。结果发现：在局部识别中声旁使用频率的影响和部件类型有交互作用。声旁使用频率对识别汉字单部件声旁有易化作用。声旁组字频率的影响和部件类型有交互作用。声旁组字频率对识别汉字多部件组合声旁有易化作用。在整字识别中,声旁的使用频率有易化作用;声旁的组字频率的作用受到部件类型的影响,多部件组合声旁的组字频率对识别整字有易化作用。     

年龄、焦虑与情节记忆之内容与来源的关系

将情节记忆区分为内容记忆和来源记忆,筛选年老和年轻的高、低特质焦虑者完成记忆任务,以探讨情节记忆年老化的选择性和变异性及其与焦虑之间的联系。两项实验结果表明来源记忆是否随增龄而有选择性受损受来源性质影响,与来源呈现方式和来源识记意识性无关。焦虑干扰了老年组的记忆操作,是老年人情节记忆存在个体差异的原因之一;但焦虑对青年组没有不利影响,提示焦虑调节两类记忆的年龄差异。