3~6岁儿童执行功能子成分发展的研究

执行功能是对目标指向活动进行信息整合和控制调节的一系列认知能力,在学前期发展迅速。研究使用执行功能任务组软件考察了210名3~6岁儿童（6组,组间年龄跨度6个月）执行功能各子成分（工作记忆、抑制控制和认知灵活性）的发展特征。结果表明：（1）随年龄增长,3~6岁儿童执行功能呈上升趋势发展,4岁左右为抑制控制与认知灵活性的高速发展期;（2）执行功能各子成分发展不同步,抑制控制最快,工作记忆最慢;（3）各子成分间呈中度正相关。结论：3~6岁执行功能能力发展迅速,但各子成分的发展进程并不一致;幼儿阶段执行功能测试的年龄分组最好精确到6个月。     

6～11岁儿童执行功能发展研究

以168名6~11岁儿童为被试,使用9种执行功能任务研究了儿童三种执行功能成分的发展,三种执行功能是,抑制(Inhibition)、转换(Shifting)和刷新(Updating),结果发现:整个儿童阶段,三种执行功能一直表现出随年龄递增而增长的趋势;不同的执行功能表现出不同的发展速率,其中抑制控制大约在6~7岁表现出一个快速的增长期,记忆刷新从7岁到10岁一直呈线性增长,转换表现出两个快速增长期,第一个快速增长则发生在7~8岁之间,第二个快速增长则发生在9-10岁之间,三种执行功能的发展趋势到大约10岁后趋于平缓,10岁和11岁儿童的表现没有显著性差异;所有执行功能任务测量中没有发现性别主效应,年龄和性别的交互作用不显著。     

3~6岁儿童数感发展的研究

从上海两所中等水平幼儿园以年龄班分层随机抽取180名3~6岁儿童为被试,采用个别测查法考察其数感发展状况。结果表明:(1)3~6岁儿童的数感发展存在显著年龄差异,无性别差异;(2)顺数、实物比较和数符号辨认是其表现较好的三项技能,而倒数和序数却表现较差;(3)数感各组成部分发展不同步,倒数,序数和数符号在中班到大班期间发展迅速,而顺数,基数概念,加减理解却在小班到中班期间发展较快。     

2~5岁儿童愿望理解能力的发展

愿望理解是儿童心理理论的重要组成部分.研究选取2~5岁的儿童79名,使用简单愿望推理任务、愿望形成理解任务、冲突愿望理解任务、对自己过去愿望理解任务以及对他人愿望理解任务,系统地探讨愿望理解的层次性.实验结果表明,儿童在对自己过去愿望理解任务中的成绩比简单愿望推理、愿望形成理解和冲突愿望理解中的成绩要好,在冲突愿望理解任务中的成绩比对他人愿望理解的任务要差.说明儿童的愿望理解能力包含着多个方面,其发展步调并不一致,具有一定的顺序性.     

儿童2~7岁行为抑制性的发展

采用实验室录像观察对中国儿童的行为抑制性的发展进行了追踪研究(2岁、4岁、7岁)。儿童2岁时,有124名儿童参加了实验室观察。儿童4岁时,由于搬迁、退出或失约,有103名儿童参加。儿童7岁时由于以上原因有100名儿童参加实验室观察。在2岁、4岁、7岁至少参加一次观察的儿童有113名,而在三个时间点都参加观察的儿童有89名。我们对儿童2~7岁行为抑制性整体发展的稳定性以及行为抑制性和非抑制性的发展趋向进行了分析。结果表明,中国儿童从2岁到7岁的行为抑制性的整体发展稳定性较低。从2岁到7岁,行为抑制性-非抑制倾向比较稳定的儿童共28人,占总人数的31.5%。而行为抑制性-非抑制性不稳定的儿童为61人,占总人数的68.5%。随着年龄增长,本研究中的儿童的行为抑制性-非抑制性倾向有向中间型趋中的趋势。从2岁到7岁,行为抑制性的发展变化没有显著性别差异     

5~6岁儿童传递推理能力的发展特点

通过有效的实验设计,在控制儿童记忆容量影响的前提下,考察了5~6岁儿童在长度传递推理和重量传递推理能力上的发展水平。结果表明:(1)5~6岁是儿童传递推理能力迅速发展的时期。在大概6岁左右,大多数儿童已经能够进行真正意义上的传递推理。(2)此年龄儿童在长度传递推理和重量传递推理能力上不具有显著差异。(3)条件排列的一致与不一致对于被试的推理成绩并不具有显著影响。     

3~6岁儿童二级错误信念认知的发展

采用“新故事”对来自两所幼儿园的133名3~6岁儿童的二级错误信念进行了测查,探查了这一阶段儿童二级错误信念认知的发展。研究主要得出以下结论：4岁左右的儿童能够掌握二级未知知识,但是儿童对于二级错误信念的理解要晚1~2年,6岁左右是儿童二级错误信念发展的关键期。儿童对于信念问题的错误回答主要是基于一级推理,相当一部分的6岁儿童能够基于二级推理对信念问题做出合理解释。儿童对于二级错误信念认知的发展不是一个全或无的过程,而是一个逐步发展的过程。     

4~6岁汉语儿童正字法意识的萌芽与发展

研究旨在考察汉语学龄前儿童正字法意识的发展情况。在某中等城市一所幼儿园随机选择4岁、5岁、6岁三个年龄段的儿童各31、37、34名。实验一使用汉字、韩文和日文（平假名）作为实验材料探查学龄前儿童的汉字特异性意识;实验二使用上下结构、左右结构的真字、假字和非字考察学龄前儿童的部件位置意识。实验结果显示：（1）三组儿童都能区分日文和汉字,5岁左右儿童这种能力达到成熟。4岁儿童不能区分汉字和韩文,直到6岁,辨别汉字和韩文的能力也没有发展成熟。（2）三组儿童都能意识到假字符合正字法规则,但拒绝非字的能力在学前期尚未发展成熟,儿童在学前期不具备部件位置意识;6岁儿童更容易拒绝上下部件位置颠倒的非字。     

6-12岁儿童抑制能力的发展：来自停止信号任务的证据

利用停止信号任务考察了202名一至六年级小学生抑制能力的发展趋势。被试完成一个视觉上的图形判断任务,在25%的试次中,呈现一个声音信号要求被试抑制反应。以无停止信号下的反应时来衡量反应执行能力,用停止信号反应时（SSRT）来衡量反应抑制能力。结果发现,反应抑制能力随着年龄增长而提高,具体表现为五六年级儿童的抑制能力优于三四年级和一二年级学生的抑制能力。对于反应执行能力,三四年级与一二年级没有差异,而五六年级的成绩显著优于其他年级。结果表明,五六年级儿童的反应执行能力和反应抑制能力都有显著发展。     

5~6岁自闭症儿童与正常儿童的辨别反转学习研究

采用条件性辨别反转范式,考察自闭症儿童与正常儿童的反转灵活性。44名5~6岁儿童（24名自闭症儿童,20名正常儿童）参加了辨别反转学习。结果显示：⑴在习得阶段,两类儿童都能辨别两个不同的条件性刺激;⑵在晚期反转阶段,正常儿童在晚期反转阶段升高了对新的条件性厌恶刺激的主观预期值,辨别了新的条件性刺激,而自闭症儿童在晚期反转阶段对新的条件性厌恶刺激的主观预期值没有显著性变化,无法辨别新的条件性刺激。研究结果表明,5~6岁自闭症儿童反转灵活性存在缺陷。     

调型和调阶对阳平和上声知觉的作用

使用心理-物理的方法研究了汉语普通话母语者对阳平和上声的感知。实验结果表明：普通话母语者对阳平和上声的分辨呈现出一定的范畴化倾向, 但普通话母语者区分这两个声调的范畴化程度不及他们区分阴平和阳平的范畴化程度; 普通话母语者不倾向于把孤立的低平升调和低平调辨认为上声; 在调阶不高的条件下, 音高曲线终点的“高”对于阳平的感知并不重要。这些结果暗示着, “低降”是和“升”分别是普通话上声和阳平的音系特征, 普通话可能也像吴方言一样存在阴、阳调域的差别, 阳平和上声同属于低调域。     

情绪和社会行为的迷走神经活动基础

Porges基于自主神经进化观点提出的多迷走神经理论, 区分了无髓鞘迷走神经与髓鞘迷走神经的不同功能。认为对心脏等起调控作用的髓鞘迷走神经, 经由进化逐渐与调控头面部肌肉的脑神经之间产生了神经上的联系, 成为情绪和社会行为的神经基础。已有的相关实证研究表明, 髓鞘迷走神经与个体的情绪表达与调节、社会行为以及情绪与社会行为障碍密切相关。较低的迷走神经张力、较低的迷走抑制与较低的情绪调节能力相关; 迷走抑制较高的学前儿童有较少的行为问题以及较好的社交技能; 焦虑障碍的个体表现出较低的基线迷走张力以及较低的迷走抑制水平等。多迷走神经理论及其实证研究的结果, 对于推动情绪和社会行为的自主神经基础研究具有重要的意义。     

Facial expressions and vagal tone of infants of depressed and non-depressed mothers

Mothers classified as ‘depressed’, ‘non-depressed’ or ‘low scoring’ on the Beck Depression Inventory and their 3-month-old infants were videotaped during 3-minute face-to-face play interactions. Infants' facial expressions were coded using the AFFEX facial expression coding system and their EKG was recorded during the interactions to assess the relationship between cardiac measures and facial expressivity. Infants of both ‘depressed’ and ‘low scoring’ mothers showed significantly more sad and anger expressions and fewer interest expressions than infants of nondepressed mothers. Cardiac vagal tone, (quantified from the amplitude of respiratory sinus arrhythmia) was correlated with infants' joy and interest expressions and with self-comfort behaviours in the non-depressed and low scoring groups, but not in the depressed group. The results suggest that matermal depression affects infants' affective state and appearance as well as their biobehavioural emotional regulation systems.     

Posttraining Electrical Stimulation of Vagal Afferents with Concomitant Vagal Efferent Inactivation Enhances Memory Storage Processes in the Rat

Peripherally administered or released substances that modulate memory storage, but do not freely enter the brain, may produce their effects on memory by activating peripheral receptors that send messages centrally through the vagus nerve. Indeed, vagus nerve stimulation enhances memory performance, although it is unclear whether this effect is due to the activation of vagal afferents or efferents. To eliminate the possible influence of descending fibers on memory storage processes, rats were implanted with cuff electrode/catheter systems along the left cervical vagus. Forty-eight hours following surgery, each animal received a 3.0-μl infusion (1.0 μl/min) of either lidocaine hydrochloride (75.0 mM) or isotonic saline below the point of stimulation. Animals were then trained 10 min later on an inhibitory-avoidance task with a 0.75-mA, 1.0-s foot shock. Sham stimulation or vagus nerve stimulation (0.5-ms biphasic pulses; 20.0 Hz; 30 s; 0.2, 0.4, or 0.8 mA) was administered immediately after training. Memory, tested 24 h later, was enhanced by stimulation whether descending vagus nerve fibers were inactivated or not. Both lidocaine- and saline-infused groups showed an intensity-dependent, inverted-U-shaped pattern of retention performance, with the greatest effect observed for 0.4 mA (U= 9,p< .05, andU= 7,p< .01, respectively). Additionally, animals that received lidocaine infusions, but no vagus nerve stimulation, showed impaired memory compared to the performance of saline-infused control animals (U= 11,p< .05). Together, these findings suggest that vagal afferents carry messages about peripheral states that lead to the modulation of memory storage and that the memory-enhancing effect produced by vagus nerve stimulation is not mediated via the activation of vagal efferents.     

汉语听觉词汇加工中声调信息对语义激活的制约作用

进行了三个跨通道启动词汇判断实验,探讨汉语听觉词汇加工中声调信息对语义激活的制约作用。实验一和二使用具有相同音段信息、但不同声调信息的双音节合成词（如“条约”和“跳跃”）作为听觉启动词,与其中一个词有语义关系的双字词作为视觉探测词。语义启动词与其配对的声调不匹配词在第一音节的声调、第二音节的声调、或两个声调上有所不同。实验三改变语义启动词的第一或第二音节的声调,以产生声调不匹配的假词启动项;实验三还同时变化了原来的声调与产生的声调之间的相似性。实验结果表明,声调不匹配的启动项目是否产生显著的启动效应取决于词汇竞争的环境、声调输入与深层声调表征之间匹配的程度,以及不匹配的声调所在的位置。文章从语音输入中的声调信息如何激活词汇表征、声调信息如何存储在心理词典中、声调对语义激活的制约作用如何受竞争环境的影响这三个方面讨论了研究的发现。     

Comorbid depression and heart rate variability as predictors of aggressive and hyperactive symptom responsiveness during inpatient treatment of conduct‐disordered,ADHD boys

The primary objective of the present study was to assess the utility of (1) comorbid depression and (2) parasympathetic influence on cardiac function as markers for treatment response among aggressive preadolescent males. Inpatient records of 53 patients with conduct disorder and attention deficit hyperactivity disorder (17 with a comorbid depressive disorder) were examined, including an intake electrocardiogram and daily tallies of several indices of aggressive behavior across 3 weeks of stay. The relations of comorbid depression, heart rate variability, and residualized heart rate (primarily of sympathetic origin) to treatment response were assessed through analyses of linear growth functions. Significant vagal tone by diagnostic status interactions were obtained for both frequency and duration indices of aggression, whereby nondepressed patients with high vagal tone deteriorated and depressed patients with high vagal tone improved during hospitalization. No such relation was found for attention deficit hyperactivity disorder symptoms. Patients in the comorbid group also exhibited greater heart rate variability than their nondepressed counterparts. Furthermore, residualized heart rate was predictive of maternal substance use and paternal incarcerations. These findings suggest complex relations among treatment response, comorbid depression, and emotion regulation in male preadolescents with severe behavior disorders. Additionally, the differential prediction afforded by vagal tone and residualized heart rate underscores the importance of assessing both parasympathetic and sympathetic indices of cardiac function as distinct physiological markers. Aggr. Behav. 26:425–441, 2000. © 2000 Wiley‐Liss, Inc.     

汉语元音对声调感知边界的影响

本项研究基于现代汉语普通话声调感知具有范畴性这一结论(Wang, 1976), 以普通话中6个单元音(/a//?//F//i//u//y/, 即拼音a、o、e、i、u、ü)阴平(T1)到阳平(T2)调的连续统(continuum)为实验语料, 用专业语音学软件Praat合成连续统语音样本, 对20名平均年龄为22.90岁的普通话母语者进行声调感知实验, 即让被试对所听刺激进行T1或T2的二选一鉴别测试(identification test), 从而探究单元音的内在音高(intrinsic pitch)与声调感知边界(boundary)的关系。本文借鉴Wang (1976)和Peng等(2010)对元音/i/声调连续统的合成方法, 使声调感知研究拓展到普通话中除/i/之外的其他5个单元音, 对以上两项研究起到一定的对照作用。研究发现, 元音会对T1到T2的声调范畴感知边界位置产生影响, 低元音/a/的内在音高较低, 其边界位置亦始终低于其他元音, 且具有显著性差异, 实验结果证明, 内在音高会对感知边界产生影响, 从而支持了Ohala和Eukel (1976)的“舌位拉伸”假说。     

万爽力对老年瓣膜退性变致心功能不全的研究

探讨万爽力对老年心脏瓣膜退性变致心功能不全患者治疗的效果。入选病例共84例,随机分为对照组42例传统方法治疗;治疗组42例,加用万爽力治疗,3个月后,观察心功能、左室舒张期内径、左室射血分数、测6min步行距离、血浆脑钠肽水平。3个月治疗后,两组心功能、左室舒张期内径、左室射血分数、6min步行距离、血浆脑钠肽水平有显著性差异(P<0.05)。由此可以得出结论,万爽力对老年心脏瓣膜退性变致心功能不全治疗有临床治疗意义。     

The Impact of Face Skin Tone vs. Face Symmetry on Perceived Facial Attractiveness

The purpose of this study was to assess and compare the relative contribution of skin tone and symmetry on judgment of attractiveness regarding female faces. Two hundred and fifteen Mozambican adults were presented with a set of faces, and instructed to rate their degree of attractiveness along a continuous scale. Chi-square, factorial weight analyses and ANOVA were used to analyze the data. Face skin tone had a significant impact on the participants' attractiveness judgment of target faces. However, the target face skin tone contribution to the participants' attractiveness judgment (5% of the total variance) was much weaker than the contribution of the target face symmetry (85% of the total variance). These results imply that skin bleaching, common among Black people across sub-Saharan African countries, is not only dangerous to the health of those who practice it, but it is unlikely to make them appear much more attractive.