言语想象的神经机制

言语想象不仅在大脑预处理机制方面起到重要的作用,还是目前脑机接口领域研究的热点。与正常言语产生过程相比,言语想象的理论模型、激活脑区、神经传导路径等均与其有较多相似之处。而言语障碍群体的言语想象、想象有意义的词语和句子时的脑神经机制与正常言语产生存在差异。鉴于人类言语系统的复杂性,言语想象的神经机制研究还面临一系列挑战,未来研究可在言语想象质量评价工具及神经解码范式、脑控制回路、激活通路、言语障碍群体的言语想象机制、词语和句子想象的脑神经信号等方面进一步探索,为有效提高脑机接口的识别率提供依据,为言语障碍群体的沟通提供便利。     

3~5岁儿童理解和使用空间表征的特点

以96名3~5儿童为被试,采用自编的儿童空间表征实验任务,在语言表征、模型表征和图画表征三种空间表征形式上,考察了儿童理解和使用空间表征的发展特点。结果表明:(1)总体上,3~5岁儿童理解空间表征的发展水平均显著高于使用空间表征的发展水平。(2)3~5岁儿童理解和使用空间表征的发展表现出显著的年龄效应。(3)从不同的空间表证形式来看,3岁儿童理解语言表征的能力与理解模型表征的能力之间差异显著,4岁儿童使用语言表征的能力与使用模型表征的能力之间的差异、使用语言表征的能力与使用图画表征的能力之间的差异、以及使用模型表征的能力与使用图画表征的能力之间的差异都显著,其余形式的空间表征理解之间的差异或空间表征使用之间的差异在各年龄段中均不显著。     

Delayed imitation of complex behavioural sequences by 14- to 16-month olds

The present study was conducted to determine if children under the age of 18 months can exhibit delayed imitation of three-event sequences when they have no opportunity to practice. Twenty-three 14- to 16-month-old children underwent two different imitation conditions. In the practice condition the children could imitate the sequence immediately after modelling; then they were tested 1 or 7 days later. In the no practice condition the children had the chance to imitate only on the test day. Children were able to imitate the sequences under both conditions irrespective of the delay period. They produced significantly more target actions, and more target actions in the correct order, in the test phase and cued recall phase, compared with the baseline. There were no differences between the two conditions with a 1-day delay period, but after a 7-day delay, the number of target actions produced during the practice condition was significantly higher than those in the no practice condition. The results are discussed in terms of nonverbal mimetic representations. © 1998 John Wiley & Sons, Ltd.     

Maternal representation and care of infant sleep

Maternal reports about infant sleep care and ideas about the causes of awakening were obtained from telephone interviews with 104 middle class primiparae when their infants were 1 month and 1 year old. These reports were compared with their expectations about infant sleep before the birth of their child. It was found that most of the mothers were willing to ‘help’ their infants fall asleep, with 19 different kinds of techniques being spontaneously mentioned. Most of the techniques involved physical contact. The changes in technique from before birth to the end of the first year of life mainly concerned a decrease in the use of techniques involving holding the infant in the arms. From 1 month to 1 year, there was a decrease in rocking techniques, while at 1 year the use of a (bottle) feeding technique and taking the child into the parents' bed became apparent. The reasons mothers gave for infant awakenings varied from 1 month to 1 year. At 1 year, the most frequent reason was that the infant has ‘sufficient sleep’. Mothers' representations before the infant birth did not overlap with representations and reports of sleep handling after birth. Mothers were willing to apply and use a great variety of caring techniques that they perceived to be adjusted to the individual needs of their child. © 1998 John Wiley & Sons, Ltd.     

增塑剂DEHP的神经和行为发育毒性

增塑剂邻苯二甲酸二乙基己酯(Di-(2-ethylhexyl) phthalate,DEHP)是一种具有拟雌激素和抗雄激素活性的环境内分泌干扰物,人类和野生动物可通过不同途径终生暴露于DEHP.母体摄入的DEHP可通过胎盘和乳汁转入子代体内并进入脑组织.围生期DEHP暴露性别特异性地改变子代大鼠下丘脑视前区芳香酶活性而影响雌激素合成,并通过改变雌激素受体活性干扰雌激素对脑发育的调节作用.DEHP及其代谢产物可以影响神经细胞的增殖分化和突触形成,干扰性激素调控发育过程中的下丘脑氨基酸递质系统对促性腺激素释放激素分泌的刺激作用,影响中脑多巴胺递质系统发育而诱导自发性多动症.DEHP对脑发育的作用最终影响动物的早期行为、学习记忆和情感等行为发育.     

文章标记对高一学生阅读理解的影响

采用测验法,以64名高中一年级学生为被试,探讨文章标记对不同阅读水平学生的回忆成绩和问题解决的影响.结果表明:(1)不同阅读水平读者回忆成绩上的文章标记效应不显著;(2)文章标记对于不同阅读水平学生的问题解决都具有显著的影响作用;(3)不同阅读水平读者的回忆和问题解决成绩存在显著差异.     

神经元活动的时相同步与脑功能整合

从大脑整合的角度分析心理的神经机制。神经元之间的交互和动态联结而构成神经集合被认为是每一个认知活动的基础。然而这一交互作用的具体性质,即脑整合的机制尚未明确。通过对有关实验结果的分析,认为神经元活动的时相同步可能是脑整合的机制。     

On the current status of the evolutionary theory of behavior dynamics

The evolutionary theory of behavior dynamics is a complexity theory that instantiates the Darwinian principles of selection, reproduction, and mutation in a genetic algorithm. The algorithm is used to animate artificial organisms that behave continuously in time and can be placed in any experimental environment. The present paper is an update on the status of the theory. It includes a summary of the evidence supporting the theory, a list of the theory's untested predictions, and a discussion of how the algorithmic operations of the theory may correspond to material reality. Based on the evidence reviewed here, the evolutionary theory appears to be a strong candidate for a comprehensive theory of adaptive behavior.     

Pushing Archetypal Representational Systems Further

We revived Jung’s Archetypes to characterize what we see as an emerging confluence of evolutionary, embodied, and ecological responses to traditional cognitive models of mental representation. We propose that all humans possess archetypal representational systems that are (a) computationally grounded in perception and action, (b) shaped by learning and culture, and (c) biologically prepared by our ancestral past. Because these functionally modular systems arose in tandem with—and in response to—our increasingly complex social world, one implication is that even the most abstract issues studied in cognitive science may be, at least in part, scaffolded on more ancient social and emotional calculi.     

具身认知视角下的道德隐喻表征

道德隐喻已成为道德心理学研究的热点问题,随着具身认知相关理论的兴起,道德隐喻的具身研究逐渐展开。目前,具身道德隐喻的维度主要包括空间、温度、洁净、颜色、明暗、触觉、味觉、嗅觉等。具身道德隐喻的相关理论解释主要包括概念隐喻理论、具身认知理论、知觉符号理论和架构理论。今后的具身道德隐喻应更多的探讨跨文化的差异性,丰富道德隐喻具身维度的内容以及各维度之间的相关性,同时要引入道德隐喻的影响机制分析。