Unusual stress behaviour of CeO2-doped diamond-like carbon nanofilms

CeO₂-doped diamond-like carbon (DLC) films with thicknesses of 180–200 nm were deposited by unbalanced magnetron sputtering. When the CeO₂ concentration is in the range 5–8%, the residual compressive stress of the deposited films is reduced by 90%, e.g. from about 4.1 GPa to 0.5 GPa, whereas their adhesion strength increases. These effects are attributed to the dissolution of CeO₂ within the DLC amorphous matrix and a widening interface between the DLC film and the Si substrate, respectively.     

Transmission electron microscopy characterization of the high-Tc superconductor HgBa2Ca3Cu4O 10+ delta

The structures of HgBa3Ca4Cu4O10+ delta(Hg-1234) samples have been characterized by means of high-resolution electron microscopy, electron diffraction, X-ray energy-dispersive spectroscopy (XEDS) and electron-energy-loss spectroscopy (EELS) techniques. A modulated structure with a modulation vector of q = (0.036-0.048) b* + 0.5c* was found for Hg-1234. High-resolution electron microscopy on the modulated structure revealed slight displacements of atomic layers along the c direction. The anomalous contrast induced by the modulation was observed to be distributed asymmetrically between the HgOdelta layers, leading to the breakdown of the (001) mirror symmetry of the basic structure. XEDS compositional analyses showed a depletion of mercury for the modulated Hg1234 compared with the unmodulated Hg-1234, while EELS analysis suggested the presence of carbon in the modulated Hg-1234 phase. In addition, a sidecentred ordered (Cu, Hg)-1223 phase with low mercury content was identified as one of the major impurity phases in the Hg-1234 samples.     

An Experimental Test of Whether Informants can Report About Child and Family Behavior Based on Settings of Behavioral Expression

Researchers and practitioners conduct multi-informant assessments of child and family behavior under the assumption that informants have unique perspectives on these behaviors. These unique perspectives stem, in part, from differences among informants in the settings in which they observe behaviors (e.g., home, school, peer interactions). These differences are assumed to contribute to the discrepancies commonly observed in the outcomes of multi-informant assessments. Although assessments often prompt informants to think about setting-specific behaviors when providing reports about child and family behavior, the notion that differences in setting-based behavioral observations contribute to discrepant reports has yet to be experimentally tested. We trained informants to use setting information as the basis for providing behavioral reports, with a focus on parental knowledge of children’s whereabouts and activities. Using a within-subjects controlled design, we randomly assigned 16 mothers and adolescents to the order in which they received a program that trains informants to use setting information when providing parental knowledge reports (Setting-Sensitive Assessment), and a control program involving no training on how to provide reports. Relative to the control program, the Setting-Sensitive Assessment training increased the differences between mother and adolescent reports of parental knowledge, suggesting that mothers and adolescents observe parental knowledge behaviors in different settings. This study provides the first experimental evidence to support the assumption that discrepancies arise because informants incorporate unique setting information into their reports.     

品牌印象结构及其测量研究

品牌印象是消费者基于对品牌信息的感知和体验而在头脑中留下的品牌部分或整体信息。在文献研究和关键事件访谈的基础上,通过筛选条目、形成初步问卷、预测验和正式测验等程序,经探索性因素分析和验证性因素分析,重测信度、聚合效度、辨别效度、法则效度和效标关联效度等检验,发现全方位的品牌印象由品牌质量印象、品牌传播印象、品牌服务印象和品牌价格印象等四个维度构成。用于测量品牌印象的多维量表、各维单项目量表和单项目量表均具有较好的信度和效度。     

Bootstrap Confidence Intervals for Ordinary Least Squares Factor Loadings and Correlations in Exploratory Factor Analysis

This article is concerned with using the bootstrap to assign confidence intervals for rotated factor loadings and factor correlations in ordinary least squares exploratory factor analysis. Coverage performances of SE-based intervals, percentile intervals, bias-corrected percentile intervals, bias-corrected accelerated percentile intervals, and hybrid intervals are explored using simulation studies involving different sample sizes, perfect and imperfect models, and normal and elliptical data. The bootstrap confidence intervals are also illustrated using a personality data set of 537 Chinese men. The results suggest that the bootstrap is an effective method for assigning confidence intervals at moderately large sample sizes.     

The representation of category typicality in the frontal cortex and its cross-linguistic variations

When asked to judge the membership of typical (e.g., car) vs. atypical (e.g., train) pictures of a category (e.g., vehicle), native English (N = 18) and native Chinese speakers (N = 18) showed distinctive patterns of brain activity despite showing similar behavioral responses. Moreover, these differences were mainly due to the amount and pervasiveness of category information linguistically embedded in the everyday names of the items in the respective languages, with important differences across languages in how pervasive category labels are embedded in item-level terms. Nonetheless, the left inferior frontal gyrus and the bilateral medial frontal gyrus are the most consistent neural correlates of category typicality that persist across languages and linguistic cues. These data together suggest that both cross- and within-language differences in the explicitness of category information have strong effects on the nature of categorization processes performed by the brain.     

汉字识别的时间进程：来自字谜任务的ERP证据

通过“学习-测试-判断”的三阶段实验范型, 采用事件相关电位（ERP）技术探讨了猜谜任务中对谜底答案（单个汉字）识别的脑内时程动态变化。结果发现：语义识别与字形识别下,汉字刺激均诱发了明显的N1、P2和N2成分,其中语义识别下的P2波幅表现为更加正性,可能与汉字语义的早期加工有关;随后,300-400ms内,语义识别比字形识别诱发了一个更加正性的ERP成分,该成分可能属于P300成分,反映了对汉字语义的进一步整合加工;最后,500-600ms内,语义识别比字形识别同样诱发了一个更加正性的ERP成分,可能反     

大学生压力事件与网络游戏成瘾:逃避动机的中介效应*

以472名男大学生网络游戏玩家为被试,考察了压力事件、网络游戏逃避动机和网络游戏成瘾的关系。结果发现:(1)大学生压力事件、网络游戏逃避动机和成瘾之间存在显著正相关。(2)压力事件除了对网络游戏成瘾有直接影响,还通过网络游戏逃避动机的中介作用对网络游戏成瘾产生间接影响。     

Mechanisms for attentional modulation by threatening emotions of fear,anger, and disgust

Appropriately attending to threatening environmental stimuli is evolutionarily adaptive and crucial for survival. This study revealed that nonconscious attentional modulation of disgust has different behavioral and event-related potential (ERP) patterns, as compared to fear and anger. To facilitate its evolutionary purpose of avoidance, disgust first diverts rather than attracts attention. Accordingly, the N1 was smaller in a validly than in an invalidly disgust-cued condition. Furthermore, the frontal P3a for disgust, anger, and fear was found to be larger in the valid than in the invalid condition, which was interpreted as an involuntary switching of attention toward threat-related events to mobilize cognitive resources for action or defense. On the contrary, the parietal P3b only occurred at the conscious level; the enhanced P3b indicated that more cognitive resources were being allocated toward the task-relevant but previously less attended location, to ensure the effective achievement of task goals. In addition, group comparisons between individuals with low and high disgust sensitivity showed that the ERP differences between the disgust and the anger/fear conditions at the unconscious level may be attributed only to individuals with high disgust sensitivity. These findings, together with previous knowledge of the effects of fear and anger on attention, strengthen our confidence in the two-stage scheme of attentional modulation by threats, which consists of an early stage of bottom-up response scaling of sensory processing (reflected by the P1 and N1) and a later stage of top-down integration and regulation of emotion and behavior (reflected by the P3).     

视觉选择性注意对注意缺损多动障碍儿童数字距离效应的影响

采用Posner的内源性和外源性线索实验范式,材料为1~9的阿拉伯数字(不包括5),以判断目标数字是否大于5为任务,考察视觉选择性注意中的内源性注意和外源性注意对注意缺陷型多动障碍儿童(ADHD)数字加工距离效应的影响。结果发现:(1)内源性和外源性注意条件下,正常儿童在数字判断加工任务中的反应时短于ADHD儿童;(2)内源性有效线索提示条件下,ADHD儿童和正常儿童均表现出显著的数字距离效应;而无效线索提示条件下,ADHD儿童的大小数字距离效应均不明显,正常儿童仍然表现出显著的数字距离效应;(3)外源性有效线索提示条件下,ADHD儿童的小数字距离效应显著,但大数字距离效应不明显,正常儿童则表现出显著的大小数字距离效应;而无效线索提示条件下,只有正常儿童表现出显著的数字距离效应,ADHD儿童的数字距离效应不显著。