健全人群对智障人群的态度研究:现状与展望

目前,全球每6个人中便有一个残疾人,其中智障人群占相当比例.智障人群作为社会生活中的特殊群体,因其认知能力受限,其生活面临诸多实际困难,导致健全人群对其容易形成负性态度.文章从普通公众和智障者服务人员两个方面评述了健全人群对智障者的态度特性及其干预策略的相关研究,并从研究主题和研究方法两个方面展望了未来的研究方向.     

低家庭社会经济地位与青少年社会适应的关系:感恩的补偿和调节效应

该研究采用家庭社会经济地位问卷、青少年外化问题行为调查表、焦虑抑郁量表、学业成就问卷和感恩问卷对1518名中学生进行调查,考察了低家庭社会经济地位(低家庭SES)与青少年社会适应的关系,以及感恩在其中的补偿和调节效应。结果发现:1)低家庭SES与外化问题行为和内化问题行为(以焦虑抑郁为指标)显著正相关,与学业成就显著负相关;2)感恩在低家庭SES与青少年社会适应各指标关系间的补偿效应均显著;3)感恩在低家庭SES与青少年社会适应各指标关系间的调节效应均不显著。这表明低家庭SES对青少年发展具有跨领域的不利影响,而感恩在其中具有显著"滞后的"补偿作用,但"同步的"风险缓冲作用有限。     

Multicultural Mastery Scale for youth: multidimensional assessment of culturally mediated coping strategies

Self-mastery refers to problem-focused coping facilitated through personal agency. Communal mastery describes problem solving through an interwoven social network. This study investigates an adaptation of self- and communal mastery measures for youth. Given the important distinction between family and peers in the lives of youth, these adaptation efforts produced Mastery-Family and Mastery-Friends subscales, along with a Mastery-Self subscale. We tested these measures for psychometric properties and internal structure with 284 predominately Yup'ik Eskimo Alaska Native adolescents (12- to 18-year-olds) from rural, remote communities-a non-Western culturally distinct group hypothesized to display higher levels of collectivism and communal mastery. Results demonstrate a subset of items adapted for youth function satisfactorily, a 3-response alternative format provided meaningful information, and the subscale's underlying structure is best described through 3 distinct first-order factors organized under 1 higher order mastery factor.     

Interaction of a dislocation with an elliptical hole in icosahedral quasicrystals

The interaction between a dislocation and an elliptical hole in icosahedral quasicrystals is considered. An explicit expression for the complex potential is derived using the extended Stroh formalism. Based on the conformal mapping method and a perturbation technique, closed-form solutions are obtained. The field intensity factors at a crack tip and the image forces on the dislocation arising from the crack are calculated. The effects of phonon–phason elastic coupling on the mechanical behavior are also observed.     

美国华人移民的异文化压力:特点、影响因素和中介效应

从美国NLAAS的调查数据中直接抽取美国华人移民样本473份,探讨美国华人移民异文化压力的特点、影响因素及中介效应。结果显示:美国华人移民体验的异文化压力较大,且与多因素存在显著相关,英语熟练度、移民时的年龄、移居美国的年数和种族歧视对压力具有显著预测性;社会地位作为中介变量可以有效缓冲美国华人移民的异文化压力。     

Investigating the Impact of Uncertainty About Item Parameters on Ability Estimation

Asymptotic expansions of the maximum likelihood estimator (MLE) and weighted likelihood estimator (WLE) of an examinee’s ability are derived while item parameter estimators are treated as covariates measured with error. The asymptotic formulae present the amount of bias of the ability estimators due to the uncertainty of item parameter estimators. A numerical example is presented to illustrate how to apply the formulae to evaluate the impact of uncertainty about item parameters on ability estimation and the appropriateness of estimating ability using the regular MLE or WLE method.     

Older children's misunderstanding of uncertain belief after passing the false belief test

A four-location belief task was designed to examine children's understanding of another's uncertain belief after passing a false belief (FB) task. In Experiment 1, after passing the FB task, participants were asked what a puppet would do after he failed to find his toy at the falsely believed location. Most 4-year-olds and half of 6-year-olds children who passed the FB test showed difficulty in handling uncertain belief; answering that the puppet would then look for his toy at the current (moved-to) location. Eight-year-old children and adults all recognized that the puppet would look for the toy everywhere, or at random. In Experiment 2, 4- and 6-year-olds were presented two other search tasks; it was shown that preschoolers could use search strategies to solve a similar search problem when FB was not involved. This new aspect of post-FB understanding can be interpreted in terms of limited understanding of uncertainty in a less-knowledgeable individual and of limited ability to infer the consequences of belief-disconfirmation.     

一般流体智力的结构与老化机制--结构方程模型的比较

近年来一般流体智力的认知结构与老化机制已成为认知研究中的一个热点。本研究通过结构方程模型探讨了认知加工速度、工作记忆、注意能力与一般流体智力的联系,结果表明：加工速度、控制性注意是一般流体智力的主要认知成分,工作记忆并非一般流体智力的认知成分,两者之间足共变关系。加入年龄因子的结构方程模型也证实了加工速度和控制性注意是一般流体智力老化的重要中介因子。     

大学生宿舍人际关系与抑郁的关系:宿舍冲突应对方式的中介作用和性别的调节作用

本研究使用宿舍人际关系问卷、抑郁自评量表和宿舍冲突应对方式问卷,采取整群随机抽样的方法,从武汉市三所大学抽取了876名大一至大四的本科生进行调查,旨在考察宿舍冲突应对方式在大学生宿舍人际关系与抑郁之间的中介作用以及性别的调节作用。结果表明：（1）宿舍人际关系与抑郁显著负相关;宿舍冲突应对方式中的竞争、回避与抑郁显著正相关,合作与抑郁显著负相关;（2）竞争与合作在大学生宿舍人际关系与抑郁之间中介效应显著;（3）性别调节了宿舍人际关系通过竞争影响抑郁的中介过程的前半段路径。本研究以宿舍人际关系和宿舍冲突应对方式为切入点考察它们对抑郁的影响机制,这为预防和干预大学生抑郁提供了新的视角。     

丰富环境对脑缺血大鼠突触界面结构修饰和PSD-95基因表达的影响

探讨丰富环境干预对局部脑缺血大鼠突触界面结构修饰和突触后致密物-95 (postsynaptic density-95,PSD-95 ) mRNA表达的影响。栓塞健康雄性Sprague-Dawley大鼠的右侧大脑中动脉,建立脑中动脉栓塞(middle cerebral artery occlusion,MCAO)模型后,分为丰富环境缺血组(IE)、标准环境缺血组(IS),同时分别设丰富环境假手术组(SE)、标准环境假手术组(SS)。以Morris水迷宫检测大鼠的空间学习记忆能力,应用透射电镜、图像分析和细胞形态计量学技术,观察海马CA1区和额叶皮层突触界面结构变化,采用RT-PCR检测突触后脚手架蛋白PSD-95 mRNA的表达。结果表明：丰富环境干预能有效改善脑缺血导致的空间学习记忆能力下降,并对正常大鼠的空间学习记忆能力也有改善作用。同时,丰富环境干预能抑制局部脑缺血导致的突触数密度减少,该作用对额叶皮层特别明显;丰富环境干预不同程度地逆转脑缺血造成的突触界面参数变化,特别使突触间隙宽度显著减小、PSD厚度明显增加;并有效抑制因脑缺血诱导的PSD-95 mRNA表达下调。以上结果提示,丰富环境改善脑缺血大鼠的空间学习记忆能力可能与其促进缺血区边缘组织突触界面结构修饰,提高PSD-95 mRNA表达有关