认知灵活性对非熟练双语者语言转换的影响--一项ERPs研究*

采用 WCST 筛选出高低认知灵活性的非熟练汉英双语者,分别使用图片命名和语义范畴判断任务考察认知灵活性对双语者语言转换的影响。结果发现：(1)高认知灵活性被试的双语转换代价是对称的,其N2成分的平均波幅和峰值显著大于低认知灵活性被试,低认知灵活性被试的转换代价是非对称的;(2)高认知灵活性被试在语言产生任务中, L2重复条件下N2的峰值显著大于L1重复条件,出现L2重复优势效应;(3)在语言理解任务中,高低认知灵活性被试在L1重复条件下的N2峰值显著大于L2重复条件,两组均出现了L1重复优势效应。研究表明,抑制控制能力在语言产生与理解的双语转换中起着重要的作用,语言转换代价源于心理词典的字词识别系统之外。     

Examining associations among factor-analytically derived components of mental health stigma, distress, and psychological flexibility

Mental health stigma can be detrimental not only for the recipient, but also for the stigmatizer. As mental health stigma is often conceptualized as a multidimensional construct, Study 1 first examined the factor structure of mental health stigma as assessed by the Stigmatizing Attitudes-Believability (SAB; Masuda, Price, Anderson, Schmertz, & Calamaras, 2009). Study 2 investigated differential relations between the factor-analytically derived components of mental health stigma and psychological distress and psychological flexibility. Results of Study 1 revealed that mental health stigma consisted of two related, yet separable components: Exclusion and Course/Origin. The Exclusion component was characterized by negative emotions and cognitions associated with an increased desire for social distance. Course/Origin was marked by pessimistic views toward treatment prognosis and recovery. Results of Study 2 suggested that these two components have differential associations with psychological distress and flexibility. The Course/Origin component of stigma, but not Exclusion, was associated with psychological distress of the stigmatizer. Furthermore, this association was fully mediated by lower levels of psychological flexibility. These findings suggest the importance of conceptualizing mental health stigma multidimensionally.     

Task switching and shifting between stopping and going: Developmental change in between-trial control adjustments

This study set out to investigate developmental differences in the ability to switch between choice tasks and to shift between Go/NoGo and choice tasks. Three age groups (7-year-olds, 11-year-olds, and young adults) were asked to consider the shape or color of a bivalued target stimulus. The participants performed a switch task in which a cue signaled the task to be performed (i.e., respond to shape vs. respond to color) and a shift task in which a cue instructed them to make a choice reaction to the shape of the stimulus or to respond (Go) versus inhibit (NoGo) to the color of the stimulus. The ability to switch was examined by considering choice-choice switches versus choice-choice repeats. The ability to shift was examined by considering NoGo-to-choice shifts versus choice-choice repeats and NoGo-to-Go shifts versus Go-Go repeats. The results showed that responding on Go trials was delayed following response inhibition on a NoGo trial. This delay did not discriminate between age groups. Responding on choice trials was considerably slowed when following response inhibition on NoGo trials. This slowing decreased with advancing age. Finally, responses on switch trials were slower compared with repeat trials, and this slowing was disproportionately large in young children compared with the other two age groups. This pattern of findings was interpreted in terms of a generic mechanism involving between-trial control adjustments in the setting of response thresholds that are likely to be mediated by a complex neural network implicating the dorsolateral prefrontal cortex and the presupplementary motor cortex.     

Transitioning between work and family roles as a function of boundary flexibility and role salience

This study investigates the manner in which people separate their work and family roles and how they manage the boundaries of these two important roles. Specifically, we focus on how role flexibility and salience influence transitions between roles. Results indicate that the ability and willingness to flex a role boundary and role salience are important predictors of transitions between roles. The joint effects of role flexibility and salience on transitions provided interesting results regarding the importance of role boundary flexibility and of the increasing importance attached to the family role. Limitations, suggestions for future research, and implications are discussed.     

Transfer of learning between 2D and 3D sources during infancy: Informing theory and practice

The ability to transfer learning across contexts is an adaptive skill that develops rapidly during early childhood. Learning from television is a specific instance of transfer of learning between a two-dimensional (2D) representation and a three-dimensional (3D) object. Understanding the conditions under which young children might accomplish this particular kind of transfer is important because by 2 years of age 90% of US children are viewing television on a daily basis. Recent research shows that children can imitate actions presented on television using the corresponding real-world objects, but this same research also shows that children learn less from television than they do from live demonstrations until they are at least 3 years old; termed the video deficit effect. At present, there is no coherent theory to account for the video deficit effect; how learning is disrupted by this change in context is poorly understood. The aims of the present review are: (1) to review the conditions under which children transfer learning between 2D images and 3D objects during early childhood and (2) to integrate developmental theories of memory processing into the transfer of learning from media literature using Hayne’s (2004) developmental representational flexibility account. The review will conclude that studies on the transfer of learning between 2D and 3D sources have important theoretical implications for general developmental theories of cognitive development, and in particular the development of a flexible representational system, as well as policy implications for early education regarding the potential use and limitations of media as effective teaching tools during early childhood.     

Perspective taking and cognitive flexibility in the Dimensional Change Card Sorting (DCCS) task

In a study with 79 3-year-olds, we confirm earlier findings that separating the sorting dimensions improve children's performance on the Dimensional Change Card Sorting (DCCS) task. We also demonstrate that the central reason for this facilitation is that the two sorting dimensions are not integral features of a single object. Spatial separation of the sorting dimensions has no additional significant influence. This finding highlights the important role of objects with respect to children's attentional flexibility. Implications for current theories on the DCCS task and for the development of perspective taking and cognitive flexibility are discussed.     

Emotional Responses to Pictures of Oneself in Healthy College Age Females

Emotional responses related to self-perceptions were investigated in healthy college-aged females using a picture-viewing paradigm that consisted of four categories of pictures (pleasant, neutral, unpleasant, and full body pictures of themselves). The startle eye-blink reflex, facial EMG, and self-reported valence, arousal, and dominance measures were recorded for each picture. Startle reflex and facial EMG measures exhibited decreased activation for self-pictures compared to the other affective categories. Self-reports indicated self-pictures were rated as moderately pleasant, low arousing, and moderately dominant relative to the other affective picture categories. The findings of reduced startle blink reflex coupled with decreased activation for all facial EMG measures and the moderate self-report ratings suggest increased attentional processing for self-pictures. These findings provide an understanding of emotional responses to self-perceptions in healthy young females.     

SWIFT-Ⅱ：阅读中眼跳发生的动力学模型

文章阐述了SWIFT模型的最新进展—SWIFT-Ⅱ模型的基本观点。SWIFT-Ⅱ模型能够在更为详细的水平上分析模型的模拟结果,也较好地解释了词长和词频效应、注视时间的分布、回视、再注视、初次登陆位置等眼动现象。最后对SWIFT-Ⅱ模型与E-ZReader模型进行了比较。     

3～4岁幼儿认知灵活性实验研究

采用维度变化卡片分类测验,对3~4岁儿童进行认知灵活性测试。根据测验结果发现在标准版本与全部变化版本间存在十分显著差异,在部分变化版与全部变化版本间同样存在十分显著差异,而在标准版本与部分变化版本间差异不显著。性别之间在后转换阶段成绩存在显著差异。年龄之间在前转换阶段成绩存在显著差异,这就表明3岁幼儿当需要在两套不相容的规则之间进行灵活的转换时遇到了困难,即前转换阶段激活了的规则保持在后转换阶段中。超过3岁到4岁间的幼儿比低于3岁或刚3岁的幼儿分类成绩要好。     

语义关联的注意捕获——来自线索化范式的证据

采用线索化范式, 操作性地建立线索和靶子的语义关联, 考察语义关联对注意捕获的影响。实验1采用特征线索意义靶子的形式, 建立某一特定语义水平的注意控制定势, 发现线索靶子语义一致时线索捕获注意, 线索靶子语义不一致时同样的线索失去捕获注意的能力。实验2随机呈现线索颜色和靶子汉字, 建立两种语义概念的注意控制定势, 发现所有的线索都出现了捕获效应, 而不论其在某一具体试次中是否与靶子意义一致。实验3交换了线索与靶子的属性及概念, 采用意义线索特征靶子的形式, 结果与实验1一致。这些结果表明, (1)语义关联的注意捕获符合关联性的无意注意定向假说, 刺激的捕获能力受当前的注意控制定势调节; (2)由语义概念激活的知觉表征在调节空间注意分配上与其自身相比形式相同, 但程度有所下降; (3)知觉特征水平的注意控制定势能够激活与其相应的语义概念, 使其吸引注意并调节空间注意分配; (4)知觉表征和语义概念的激活可能是双向的, 激活后在指导注意转移上表现出相同的特性。