When children succeed in changing their responses: Insights from three versions of a flexible categorization task

Cognitive flexibility is a hallmark of human cognition, but its development is still poorly understood. The present work examined the flexibility of categorization in preschool children. Thirty-three participants aged 3–4 years were divided into three groups, with each group receiving a different version of a flexible categorization task in which the targets belonged to two distinct categories. These versions manipulated the type of questions that were asked and the alternation of shape and color games. The children exhibited flexibility when the questions were specific (or asked about attributes). The results support the idea that instructions play a role in children’s performance in sorting tasks. Considering cognitive flexibility as an expression of the interaction between children’s knowledge and abilities on the one hand and the structure, specifics, or demands of the task on the other can help clarify what cognitive flexibility is and how it develops.     

Can Implicit Theory Influence Construal Level?

Beliefs about stability and change are captured by individuals’ implicit theories. Incremental‐theorists believe that human traits and world‐dispositions are malleable and can change through effort, whereas entity‐theorists believe that human traits and world‐dispositions are fixed. In this research we find that the implicit theory an individual holds influences an important aspect of the cognitive process, namely, the level of construal at which information is processed. In three studies we demonstrate that, compared to entity‐theorists, incremental‐theorists adopt a more abstract level of information construal, and the increased cognitive flexibility afforded by an incremental‐theory mindset explains this effect.     

熟练和非熟练中英双语者不同认知控制成分的比较

使用面孔任务考察熟练中英双语者和非熟练中英双语者在不同认知控制成分上的差异。被试为60名大学生。结果表明,熟练中英双语者在抑制控制和转换上的反应时消耗量均显著小于非熟练中英双语者,但在反应抑制上的反应时消耗量与非熟练中英双语者没有显著差异。该结果说明,二语熟练程度越高,中英双语者的认知灵活性(转换)和抑制控制(干扰控制)能力就越强;但是二语熟练程度对反应抑制能力没有明显的影响。由此可以推测,二语学习能促进中英双语者的认知灵活性(转换)和抑制控制(干扰控制)能力,但是,二语学习对中英双语者的反应抑制能力没有明显的促进作用。     

Survey of Confucius’s Approach to Expediency

Confucius held that expediency means adjusting to changing circumstances, not necessarily going along with or against anything, having a sense of propriety about times and measures, and doing things in their proper time and manner. However, expediency does not mean doing whatever one likes without any principle; instead, it means taking benevolence and righteousness as criteria and acting accordingly. In Confucius’s opinion, one should cultivate benevolence internally and act with righteousness externally, weigh importance and unimportance, measure advantages and disadvantages, and not “set the mind either for anything, or against anything,” pursuing “what the heart desires, without transgressing what is right.” In this way, he would keep to benevolence without deviating from it, act expediently without despising any principles, and attain a dialectical unification of expediency and principles.     

Differential effects of inactivation of the orbitofrontal cortex on strategy set-shifting and reversal learning

Different subregions of the rodent prefrontal cortex (PFC) mediate dissociable types of behavioral flexibility. For example, lesions of the medial or orbitofrontal (OFC) regions of the PFC impair extradimensional shifts and reversal learning, respectively, when novel stimuli are used during different phases of the task. In the present study, we assessed the effects of inactivation of the OFC on strategy set-shifting and reversal learning, using a maze based set-shifting task mediated by the medial PFC. Long–Evans rats were trained initially on a visual-cue discrimination to obtain food. On the subsequent day, rats had to shift to using a response strategy (e.g., always turn left). On Day 3 (reversal), rats were required to reverse the direction of their turn (e.g., always turn right). Infusions of the local anesthetic bupivacaine into the OFC did not impair initial visual discrimination learning, nor did it impair performance on the set-shift. In contrast, inactivation of the OFC did impair reversal learning; yet, these rats ceased using the previously acquired response rule as readily as controls. Instead, rats receiving OFC inactivations made a disproportionate number of erroneous arm entries towards the visual-cue, suggested that these animals reverted back to using the original visual-cue based strategy. These findings, in addition to previous data, further support the notion that the OFC and medial PFC play dissociable roles in reversal learning and set-shifting. Furthermore, the lack of effect of OFC inactivations on the set-shift indicates that this type of behavioral flexibility does not require cognitive operations related to reversal learning.     

作业时间和指导语导向对10-12岁儿童发散性思维的影响

研究者以239名10岁、11岁和12岁的儿童为实验对象,采用四种作业时间(2分钟、4分钟、6分钟和8分钟)和两种指导语导向(无导向、导向独特性)为实验条件,考察了这些条件对儿童发散性思维的影响.结果发现,作业时间和指导语导向对儿童发散性思维的流畅性,变通性和独特性均有明显的影响.在该实验条件下,发散性思维的三个指标随作业时间的增加而增加.有导向组儿童的发散性思维作业成绩显著高于无导向组.另外,在各实验条件下,儿童的作业成绩都有随着年龄的增长而上升的趋势.     

小学一年级数感不良儿童的筛查与动态干预

首先编制测查小学一年级儿童数感发展水平的测验, 以筛查出数感发展不良儿童并进行数量转换和数量估计的动态干预。将数感不良儿童分为干预组(29人)和控制组(27人), 并以数感正常儿童作为对照组(40人), 以比较干预训练对儿童数感水平和与之密切相关的计算流畅性的促进作用。同时进一步考查数感和计算流畅性的作用方向。结果发现：(1)所编制的儿童数感发展测验信效度良好, 能有效评估一年级儿童的数感水平; (2)数感不良儿童经干预后, 其数感水平较控制组有了明显改善, 计算流畅性水平也显著提高, 甚至达到正常组儿童的水平; (3)数感对计算流畅性有明显的预测作用, 是计算流畅性的基础。     

心理复原的机制：来自特质性复原力个体的证据

心理复原(力)是指个体在经历对生命具有威胁的事件或严重的创伤后仍然能回复到良好适应状况的心理发展现象。基于能力取向的文献表明, 积极情绪性、情绪调节是特质性复原力机制研究的重要内容; 脑岛和前额叶(特别是vmPFC和OFC)是其敏感的脑区; 作用于杏仁核脑区的5-羟色胺转运蛋白与特质性复原力密切相关。基于这些研究结果, 提出积极情绪与(自动、有意)情绪调节交互作用的双重加工理论和根据实际需要调节情绪的情绪灵活性理论。未来的研究应该就情绪记忆、人格特质等在心理复原中的作用进行探讨。     

双语双文教学促进小学生数学能力发展的研究

采用测量法,考察了我国西南部缺乏汉语环境的少数民族地区,双语双文教学方式对小学生数学能力发展的影响。结果表明,双语双文教学在一定程度上促进了小学生数学能力的发展,这种促进作用主要表现在学生对数学概念的掌握和运用上。小学四年级和五年级阶段这种促进作用明显,但到六年级促进作用减弱。     

数学学习不良儿童视觉-空间表征与数学问题解决

采用临床访谈的方法,考察了30名数学学习不良(MD)儿童和31名一般儿童的数学问题解决、视觉-空间表征策略和空间视觉化能力。结果发现：图式表征能促进数学问题的解决,图像表征则起妨碍作用;空间视觉化能力与解题正确率及图式表征策略有显著正相关,与图像表征策略有显著负相关。MD儿童的解题正确率以及使用图式表征策略的程度显著低于一般儿童,使用图像表征策略的程度则显著高于一般儿童。在解题正确率和图式表征策略这两个变量上,MD儿童和一般儿童的年级发展趋势相同,都随年级的升高而提高。但在图像表征策略的使用上,一般儿童有随年级的升高而下降的趋势,MD儿童却没有下降的趋势。两类儿童的空间视觉化能力都随年级的升高而提高。