中学生问题解决策略的基本特征研究

实验通过人—机界面,对中学生解决几何问题策略的基本特征进行探讨。对学习成绩优、差学生,在解决问题的程序上和解决问题结果的正确与错误上的差异比较后显示：学习成绩优、差学生在解决问题的程序上,尤其在问题解决的思考推理方向上没有类似专家和新手之间的显著差异;学习成绩的优、差对解决问题结果的正确与错误上具有直接的影响;问题解决规则的选择对问题解决过程具有间接影响;对问题解决规则的掌握对问题解决的结果具有重要影响。     

基于通道的内源性注意对声音诱发闪光错觉的影响

声音诱发闪光错觉是指当视觉闪光伴随不相等数量的听觉声音在100 ms内相继或同时呈现时, 个体会错觉性地知觉到视觉闪光的个数与听觉声音的数量相等。研究采用经典的声音诱发闪光错觉范式, 将注意以内源性的方式指向视觉通道或者听觉通道, 考察了基于通道的内源性注意对声音诱发闪光错觉的影响。结果发现, 当注意内源性地指向视觉通道时, 相对于基线条件, 裂变错觉的量显著减小; 当注意内源性地指向听觉通道时, 相对于基线条件, 裂变错觉的量存在增大的趋势。说明了基于通道的内源性注意可以影响声音诱发闪光错觉中的裂变错觉, 但不影响融合错觉。     

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。     

情绪学习促进无意识信息进入意识

采用突破连续闪烁抑制范式(b-CFS), 考察了经过情绪学习的刺激在无意识中是否存在加工优势。实验1使用不同朝向的光栅刺激, 结果发现情绪学习条件比对照条件的刺激在CFS中突破抑制时间更短。实验2考察了更复杂的朝向和颜色整合的光栅刺激, 发现情绪优势效应具有特异性, 仅局限于情绪学习的整合刺激。研究表明经过情绪学习后的刺激在无意识加工中存在优势。     

4-6岁儿童言语理解中世界知识运用能力的发展

以90名4-6岁学前儿童作为研究对象,考察了这一年龄段儿童在言语理解中对世界知识的运用能力及其发展特点。实验要求被试确定测试句中代词TA的回指名词,该回指名词需要被试依据相关的世界知识进行判断。实验发现：（1）4-6岁儿童在言语理解中对于世界知识的运用能力随年龄的增长而不断提高。（2）4岁组儿童对世界知识的运用能力水平较低,与其他两组儿童相比存在较显著的差异性;5岁组和6岁组儿童对世界知识的运用能力差异较小。（3）儿童在言语理解中对于不同类型的世界知识的运用能力存在显著性差异。与对现实生活相关的世界知识的运用能力相比,各组儿童对童话语境相关的世界知识的运用能力更为灵活。这一差异性在4-5岁组儿童表现得更为显著。     

Individual Differences in Brain Structure and Resting Brain Function Underlie Representation-Connection in Scientific Problem Solving

Evidence from a range of fields shows that representation-connection (RC) is the key step towards the solution of a real-world insight problem. However, no study has focused on the inter-individual variability in RC, and little is known about whether structural and resting-state functional signals can account for inter-individual differences in RC. Combining structural (regional grey matter density, rGMD) and functional (fractional amplitude of low-frequency fluctuations (fALFF) and resting-state functional connectivity (RSFC)) analysis approaches was used to examine the neural substrates of RC. The results showed that the RC score was positively correlated with rGMD and fALFF values in the bilateral lingual gyrus (LG), which might be related to relevant visual imagery during the correct matching of a specific prototype with an unsolved technical problem and the retrieval and application of key information from prototypes. In addition, the RC score was negatively correlated with the rGMD in the left dorsolateral prefrontal cortex (DLPFC), and functional connectivity analysis revealed that a higher RC score was inversely correlated with the strength of the RSFC between the right LG and the left inferior parietal lobule (IPL), which indicated that RC might be supported by decreased response inhibition and the automatic association of semantics.     

Residential mobility reduces ingroup favouritism in prosocial behaviour

People sometimes prioritize helping ingroup members over outgroup members, but sometimes they do not. The current research investigated whether residential mobility, a socioecological factor, would reduce ingroup favouritism in prosocial behaviour. In three studies, we found evidence supporting the causal role of residential mobility in reducing ingroup favouritism in prosocial behaviour. First, we found that participants in the residentially stable condition had stronger intentions to help ingroups than outgroups whereas this tendency was eliminated in the residentially mobile condition (Study 1). We replicated these findings by examining participants' money allocation in a dictator game and their actual helping behaviour in an additional request (Study 2). Furthermore, we explored the underlying mechanisms of the effect of residential mobility on ingroup favouritism in prosocial behaviour (Study 3). We found that the differentiation component of individual identity (i.e., distinctiveness and uniqueness from other people) explained the relation between individuals' moving history and ingroup favouritism in prosocial behaviour (Study 3), in which frequent moves increased differentiation, which in turn reduced ingroup favouritism in prosocial behaviour. Taken together, these studies indicate that residential mobility is powerful in shaping people's behaviour toward ingroups and outgroups, which advances the understanding of intergroup processes from a socioecological approach.     

Screening for cognitive impairment in an Australian aged care assessment team as part of comprehensive geriatric assessment

Accurate detection of mild cognitive impairment (MCI) is important to stratify and address risk. Yet, few short cognitive screening instruments are validated for this. . In Australia, all clients referred to an Aged Care Assessment Team (ACAT) receive comprehensive geriatric assessment (CGA) including the Standardized Mini-Mental State Examination (SMMSE). We compared the accuracy of the quick mild cognitive impairment (Qmci) screen to the SMMSE in 283 participants: 195 with dementia, 47 with MCI, and 41 with subjective cognitive decline (SCD) in an Australian community-based ACAT. Both had similar accuracy in identifying dementia, AUC of 0.86 for the Qmci versus 0.93 for the SMMSE (p = 0.10), but the Qmci was more accurate than the SMMSE in differentiating MCI from SCD, AUC of 0.84 versus 0.71, respectively, p = 0.046. These suggest that the new, short (3–5 min) Qmci screenis appropriate for use in an ACAT or other units conducting CGA.     

内疚与亲社会行为的关系：来自元分析的证据

内疚作为一种典型的道德情绪, 被认为具有亲社会作用, 但很多研究却发现内疚并不总能促进亲社会行为。为了明确内疚对亲社会行为的作用, 分析造成结论分歧的可能原因, 本研究采用元分析方法探讨了特质内疚与亲社会行为的关系以及状态内疚对亲社会行为的影响。共有46篇文献92个独立样本纳入元分析(N = 17248)。元分析结果表明：(1)特质内疚与亲社会行为之间存在中等程度的正相关, 二者之间的关系受到亲社会行为类型的调节, 相比较捐赠、助人、环保行为等, 特质内疚与补偿之间的相关更强; (2)启动内疚状态能显著提升个体的亲社会行为, 但两者之间的关联呈较小的效应量, 亲社会行为对象在其中起到调节作用, 感到内疚的个体更愿意对受害方做出亲社会行为; (3) p曲线(p-curve)分析发现, 两个元分析研究的p曲线均呈显著右偏态, 表明特质内疚与亲社会行为的关系以及状态内疚对亲社会行为的影响均存在真实的效应, 而不是出版偏倚或者p hacking导致。     

动作的主动控制感与因果关系的主动控制感：主动动作时间压缩效应的产生机制

主动动作的时间压缩效应指主动动作到动作结果之间存在时间上的主观压缩。基于动作的主动控制感和因果关系的主动控制感是该效应的两种理论解释。本文首先分别介绍动作的主动控制感和因果关系的主动控制感, 并从行为和脑机制角度提供相应的证据解释时间压缩效应的机制。同时, 本文提出了在主动动作时间压缩效应中动作的主动控制感与因果关系的主动控制感之间可能存在的序列加工和平行加工的关系。