不同年级学生执行功能发展水平研究

工作记忆、抑制控制及认知灵活性是执行功能的主要成分。以小学三年级、五年级,初中二年级、高中二年级320名学生为被试,研究了他们执行功能各成分的发展。结果发现:工作记忆广度、抑制控制、认知灵活性的发展随着年级(或年龄)的增长而发展,各年级之间存在显著差异。     

认知心理生理学与无创性脑功能成像技术

无创性脑功能成像技术是认知心理生理学研究的重要手段。脑电图、事件相关电位、脑磁图、正电子发射断层摄影术、单光子发射计算机断层摄影术、功能磁共振成像和功能红外线成像等技术通过对人脑的电磁、新陈代谢、血流量、氧消耗、神经元活动等的测量来研究如视觉、注意、记忆、语言等认知活动及其与相关脑机制的相互关系。它们各有优缺点。     

认知能量模型--一种更为综合的ADHD认知理论

认知能量模型是J.A.Sergeant等人提出的一种解释ADHD缺陷机制的综合性实证理论。该模型基于信息加工理论,结合了状态因素理论和几种相对成熟的模型,尝试对ADHD提供一种较为理想的解释。本文在此对该模型的基本观点、模型结构及其有关的实证研究进行介绍,并探讨认知能量模型对于未来ADHD研究的启示。     

A review of the day–night task: The Stroop paradigm and interference control in young children

The day–night task is a widely used measurement of interference control in young children between ages 3 and 7. This integrative review examines the development of interference control by describing day–night task performance. We outline essential task demands and task variants, describe theoretical explanations of performance, highlight key methodological concerns relevant to future research, and speculate upon the neural events that likely correspond to distinct components of task performance. The review concludes with suggestions for future investigation.     

ABCs of principal–agent interactions: Accurate predictions,biased processes,and contrasts between working and delegating

We experimentally investigate people’s evaluations of incentive pay contracts and people’s predictions of others’ evaluations of incentive pay contracts. We emphasize that the construction of evaluations and predictions often includes two substeps, involving likelihood judgment and likelihood weighting. Predictors appear to be biased at both substeps but in opposing directions. Accurate overall predictions thus sometimes reflect two errors that are of the same magnitude and thereby offset. Moreover, predictions can become more inaccurate if one step is debiased but the other is left untouched. Importantly, principals deciding whether to delegate a task are susceptible to just one of the biases. Delegation assessments are thus often flawed, reflecting a single error that is not offset.     

鉴定干细胞源胰岛素分泌细胞的方法及其利弊

在诱导各种干细胞向胰岛素分泌细胞(insulin producing cells,IPCs)分化的研究中,或多或少地存在着分化效率低、分化细胞不够成熟以及分泌产物的性质难以确定等问题,而IPCs的功能决定了其治疗糖尿病的效果,也是衡量各种诱导方案的重要指标。如何合理、科学地对IPCs进行形态与功能鉴定本文对此加以探讨。     

定量组织速度成像评价酒精性心肌损害左室功能的价值

为了评估定量组织速度成像(QTVI)在评价大量饮酒后心肌损害左室功能改变方面的价值,我们对饮酒量符合酒精性心肌病诊断标准患者21例(B组,每日饮白酒≥150g或啤酒4瓶,每周6天~7天,10年以上),30例健康志愿者(A组,正常对照组)进行常规超声参数及QTVI参数测定,包括:二尖瓣环收缩期峰值速度(Vs)、舒张早期运动速度(Ve)、舒张晚期运动速度(Va)等。结果显示,B组常规各超声参数与A组比较差异有显著性统计学意义(P0.01)。QTVI参数与A组比较Va减低(P0.05),Vs、Ve、Ve/Va显著减低(P0.01)。提示QTVI技术能够有效地评估酒精性心肌损害病左室功能的改变。     

论汉代易学文化解释功能的扩张

《周易》尊崇的经典地位是在西汉时期确立的,汉《易》之特色在于象数学大昌。汉代易学既以其哲理观念的宏观层面的影响,更以其卦爻符号、象数模式的具体形态的影响,介入政治、经济、军事、伦理等核心领域,也介入天文历法、物候气象、灾异、医药等自然科学领域,还介入音乐、文学、建筑等艺术领域,表现出易学文化解释功能的扩张。汉代易学文化解释功能之扩张,对当时及后世均产生极大的影响,具有独特的文化意义。     

Performance on Stroop‐like assessments of inhibitory control by 4‐ and 5‐year‐old children

The rapid development of an aspect of executive functioning (EF), inhibitory control (IC), between the ages of 3‐ and 5‐years, leads to an increase in a child's capacity to suppress inappropriate responding and therefore activate the necessary resources to carry‐out goal‐directed activity (Psychological Bulletin, 1997, 121 , 65–94). To measure EF in children, tasks administered clinically to adults are adapted. The Day–Night Stroop (DNS) is a pictorial modification of the Stroop Test (Journal of Experimental Psychology, 1935, 18 , 642–662), developed for pre‐literate children. Although suitable as a measure of IC in 3‐ to 4‐year‐old children, ceiling effects have been reported on the DNS in slightly older preschoolers. The present study attempted to overcome this limitation by examining the suitability of two modified versions of the DNS in 4‐ to 5‐year‐old preschoolers. To investigate the executive demands made by both Stroop‐like tasks, their associations with another measure of IC (stop‐signal task) and a measure of working memory were examined. Counter to expectations, no significant association was found in performance between the two Stroop‐like tasks; however, the modified DNS developed in this study showed significant relationships with the other executive tasks. The results are discussed in relation to the different methodologies used by these Stroop measures. Implications of this study suggest that researchers should consider more test‐specific factors when assessing EF in young children. Copyright © 2010 John Wiley & Sons, Ltd.     

虚拟现实技术应用于神经心理评估的研究概述

传统神经心理评估的实验控制和生态效度的平衡问题日益受到研究人员的关注,而新兴的虚拟现实(Virtual Reality,VR)技术为问题的改善带来了希望,它不仅可以模拟现实环境并支持被试的直接交互,而且能对传统测试进行再现和扩展。它所形成的评估系统能对刺激的内容和表象、任务的复杂度和被试的响应进行灵活控制,所获取的信息更丰富、准确。在初步评估注意过程(注意、单侧空间忽略)、记忆(前瞻记忆、情景记忆、空间记忆、地形定向)和执行功能方面已获得了令人满意的效果。然而目前VR评估的应用仍存在技术和设备方面的不足,以及对评估者和被试不同操作要求的局限,因此今后除了要规范化现有VR评估系统,还应该进一步发展基础条件来推动系统的广泛应用。