Shear-driven damage of ductile metals induced by indentation load

Although indentation does not induce apparent cracking in ductile materials, degradation of elastic stiffness of ductile metals has been found in micro-/macro- indentation tests. After comparing the predicted degradation by extended damaged-plasticity models with that measured by experimental testing, it is found that the softening caused by distortion of existing voids is inadequate to cause the notable degradation of elasticity. It is suggested that an independent damage-nucleation mechanism arising from shear deformation may exist. Although attractive in practical applications for its non-destructive nature, the damage-based indentation technique for estimating the fracture properties of ductile materials needs further investigation.     

地震后青少年创伤后应激障碍的潜在结构分析

为考察地震后青少年创伤后应激障碍（PTSD）的潜在症状结构,本研究采用儿童创伤后应激障碍症状量表和儿童抑郁量表,对汶川地震一年后的746名中学生进行调查。利用验证性因素分析对竞争模型进行比较,结果发现包括侵入性、回避性、麻木性、精神痛苦性唤起和焦虑性唤起等5个症状的PTSD精神痛苦性唤起模型显著优于DSM-IV的PTSD模型、4维情感麻木模型和4维精神痛苦模型。效度分析的结果发现,PTSD精神痛苦性唤起模型具有良好的外部区分效度。所有结果均表明PTSD精神痛苦性唤起模型在汶川地震后青少年群体中具有良好的适用性,可以作为判定震后青少年PTSD症状的有效标准。     

表面相似性对数量关系和相对大小关系理解的影响

研究采用数量关系匹配任务和相对大小关系匹配任务,通过高表面相似性、低表面相似性和交叉映射三种实验条件,探讨表面相似性对儿童和成人数量与相对大小关系理解的影响。研究一对37名4岁儿童进行三次每次间隔半年的追踪测查,结果表明4~5岁间儿童理解数量关系和相对大小关系的水平有显著提高;4岁儿童对数量关系的理解受到表面相似性的影响,4~5岁儿童对相对大小关系的理解受到表面相似性的影响。研究二探究44名成人数量和相对大小关系理解的特点,结果发现,成人完成两种关系匹配任务时也受到表面相似性的影响。     

The influence of working memory load on the Simon effect

The contribution of spatial and verbal working memory (WM) to the processing of stimulus location in the Simon task was examined in two experiments. Subjects performed the Simon task in single- and dual-task conditions. In the dual-task conditions, individuals first encoded the locations of four boxes/pseudocharacters or the identity of seven characters in memory, then responded to the color of a Simon stimulus, and finally received a test for the WM set. The Simon effect was insensitive to spatial WM load and was abolished by verbal WM load. These data reveal a role of verbal WM in the processing of spatial location in the Simon task. In addition, the data are inconsistent with dual-route models of the Simon effect and may support response discrimination accounts of the mechanisms underlying the processing of spatial location in the Simon task.     

The Impact of Trait Anxiety on Self‐frame and Decision Making

The present study investigated how trait anxiety influenced the formation of a self‐frame and decision making. Participants (N = 1044) responded to the Trait Anxiety Inventory. Those with trait anxiety scores ±1 Z score from the sample mean (N = 328) were recalled to respond to the self‐frame questionnaire. The results suggested that trait anxiety differences could result in differences in the editing of decision‐making information, thereby influencing the risky choice. Compared with the low trait anxiety group, participants from the high trait anxiety group showed a greater tendency to use negative vocabulary to construct their self‐frame and tended to choose conservative plans. Self‐frame suppressed the influence of trait anxiety on decision making. These results further confirmed the hypothesis that individual differences in personality traits might influence the processing of information in a framed decision task. Copyright © 2013 John Wiley & Sons, Ltd.     

幼儿书目清单的编制及其与口头词汇的关系

本研究根据中国家庭文化背景编制一个测量中国家庭亲子阅读量的问卷——幼儿书目清单,并比较书目清单和传统的父母自陈报告家庭亲子阅读频率这两种方法在预测幼儿口头词汇的效果上是否存在差异.研究发现幼儿书目清单有较好的信、效度.进一步的回归分析发现在控制了儿童的智商、父母的学历后亲子阅读量确实能显著预测幼儿的口语能力,并且书目清单的预测效果优于父母自陈报告的亲子阅读频率.     

Reciprocal Influences Between Parents’ Perceptions of Mother-Child and Father-Child Relationships: A Short-Term Longitudinal Study in Chinese Preschoolers

The authors examined whether the finding of a correspondence between specific behavioral patterns of attachment in infancy and childhood and specific representational patterns in childhood could be replicated using children's responses to a story depicting an imagined parent-child separation experience. The participants were 33 German mothers and their children (16 girls, 17 boys). Attachment quality was assessed via standard and exploratory attachment observations at ages 12 months, 18 months, and 6 years. Chi-square analyses indicated that there was a good level of concordance between the behavioral and representation attachment patterns in infancy and childhood.     

回避性依恋和注意偏向：刺激普遍性与刺激特定性

采用工作记忆算式-词对广度任务,通过87名大学生探索依恋回避倾向性与注意的关系。研究发现：依恋回避与三类词的工作记忆成绩呈负相关;工作记忆广度类型、词类型主效应显著;工作记忆广度类型与词类型交互作用显著。结果表明：回避性依恋者具有回避性注意偏向;回避性注意偏向既有刺激普遍性,又有刺激特定性,依恋性刺激比中性刺激更容易在信息加工早期被防御性地排除;回避性注意偏向具有调节情绪的功能性价值。为去激活策略情绪调节观提供了跨文化研究证据。     

十文钱问题再探

本研究设计了三个实验,探讨了被试在经典的十文钱问题以及与其异质同构的组团旅游问题中的推理情况。实验1通过调查法发现,被试在十文钱异质同构问题中表现出了与十文钱问题同样高的错误率,属于推理错觉问题。在此基础上,实验二、三就其推理错误的可能原因进行了实证探究,结果发现：（1）题目表面特征的弱化能显著提高被试的推理成绩。（2）批判性思维意识与批判性思维技巧的线索提示能显著提高被试的推理成绩。     

创伤暴露程度对中学生创伤后应激障碍的影响：复原力的调节作用

采用创伤暴露程度调查表、复原力量表和创伤后应激障碍症状量表调查了汶川地震1年后的773名中学生,考察了其复原力在创伤暴露程度与创伤后应激障碍关系中的调节作用。结果发现,地震1年后,中学生的创伤后应激障碍水平较低,其中男生的水平低于女生,初一学生的水平相对低于初二、高一和高三学生;创伤暴露程度对创伤后应激障碍及其各维度都有显著的正向预测作用;复原力在创伤暴露程度对创伤后应激障碍及其回避性症状与警觉性增高症状的影响上发生负向调节作用,在创伤暴露程度对闯入性症状的影响上不起调节作用。