The cost of serially chaining two cognitive operations

As Turing (1936, Proceedings of the London Mathematical Society) noted, a fundamental process in human cognition is to effect chained sequential operations in which the second operation requires an input from the preceding one. Although a great deal is known about the costs associated with 'independent' (unrelated) operations, e.g., from the classic psychological refractory period paradigm, far less is known about those operations to which Turing referred. We present the results of two behavioural experiments, where participants were required to perform two speeded sequential tasks that were either chained or independent. Both experiments reveal the reaction time cost of chaining, over and above classical dual-task serial costs. Moreover, the chaining operation significantly altered the distribution of reaction times relative to the Independent condition in terms of an increased mean and variance. These results are discussed in terms of the cognitive architecture underlying the serial chaining of cognitive operations.     

Neural correlates of feigned memory impairment are distinguishable from answering randomly and answering incorrectly: an fMRI and behavioral study

Previous functional magnetic resonance imaging (fMRI) studies have identified activation in the prefrontal-parietal-sub-cortical circuit during feigned memory impairment when comparing with truthful telling. Here, we used fMRI to determine whether neural activity can differentiate between answering correctly, answering randomly, answering incorrectly, and feigned memory impairment. In this study, 12 healthy subjects underwent block-design fMRI while they performed digit task of forced-choice format under four conditions: answering correctly, answering randomly, answering incorrectly, and simulated feigned memory impairment. There were three main results. First, six areas, including the left prefrontal cortex, the left superior temporal lobe, the right postcentral gyrus, the right superior parietal cortex, the right superior occipital cortex, and the right putamen, were significantly modulated by condition type. Second, for some areas, including the right superior parietal cortex, the right postcentral gyrus, the right superior occipital cortex, and the right putamen, brain activity was significantly greater in feigned memory impairment than answering randomly. Third, for the areas including the left prefrontal cortex and the right putamen, brain activity was significantly greater in feigned memory impairment than answering incorrectly. In contrast, for the left superior temporal lobe, brain activity was significantly greater in answering incorrectly than feigned memory impairment. The results suggest that neural correlates of feigned memory impairment are distinguishable from answering randomly and answering incorrectly in healthy subjects.     

一种对存在不惑的形而上学

从理解世界到理解意识,再到理解语言,形而上学的线索走的是一条唯心论道路。胡塞尔试图论证的不仅是主观性能够构造出客观性,而且只有在主观性之中才能够构造出客观性;于是,存在的客     

感知音乐音质的EEG探究

欣赏音乐是一种审美的体验活动,不同的音质会使人产生不同的感受。为探究音乐和EEG的关系,本文选用音乐《黑人舞曲》,运用主成分分析等方法,研究了11位在校大学生在欣赏不同音质音乐时的EEG特征。结果发现:在欣赏不同音质音乐时大脑皮层右颞等处快波功率差异显著。大脑对音乐的精细加工与大脑右颞等区的电活动密切相关。     

文字熟悉度对电影字幕偏好性影响的眼动研究

字幕作为电影和电视节目的重要组成部分,在视频观看过程中起到辅助加工的作用。研究以电影视频作为刺激材料,设置了中文、英文、乱码三种字幕,采用眼动技术探讨了文字熟悉性对电影观看过程中字幕偏好性的影响作用。结果发现:虽然仅凭电影中的声音就完全可以理解电影内容,但是被试仍然对不同熟悉度的字幕表现出了字幕偏好性;字幕的偏好性受到文字熟悉性的影响,随着文字熟悉度的下降,字幕的偏好性也随之降低。     

说谎者悖论的一个新解决方案的纲要(英文)

首先,本文在第二节中提出了谎者悖论所包含的一些问题,比如加强的说谎者悖论,Curry悖论,Yablo悖论,偶然的说谎者悖论,以及塔尔斯基的真不可定义性定理。其次,在第三节简单介绍了塔尔斯基的分层理论,并且指出了他方案的一个最大不足之处就是把一个真谓词分成了很多个个真谓词,这和我们的直观很不符合。之后在第四节介绍了我的一个解悖方案,并讨论了它的一些性质,比如可靠性,完全性,以及我的方案和塔尔斯基方案的区别。第五节说明了第二节中提到的一些问题在我的这个方案下如何处理。     

幼儿对不同情境中的情绪认知及其归因

考察了90名3~5岁幼儿对4种与情绪关联程度不同的日常情境中,具有积极或是消极行为表现的故事主人公的情绪理解。结果表明：（1）绝大多数幼儿都能理解各情境中具有积极行为的主人公觉得高兴。（2）幼儿对相应的消极情绪认知要相对差一些,并在3~4岁之间获得了较显著的发展进而达到基本能全数理解的水平;尤其是在低关联情境中,幼儿对消极情绪的认知更差一些,且显著低于对高关联情境中的消极情绪认知。（3）60%左右的3岁幼儿能认识到同样情境中具有不同行为表现的个体具有不同的情绪体验,到4、5岁时,幼儿的这一情感观点采择能力获得较大发展并达到成熟水平。（4）幼儿的情绪归因与情绪的性质以及具体的情境有关     

童年中期同伴关系的变化对孤独感的影响

在一年期间追踪调查了412名3、4、5年级儿童,探讨了同伴关系变化对孤独感的影响。结果表明:对于男孩而言,友谊质量上升,1年后测得的孤独感显著降低;友谊质量下降,1年后测得的孤独感显著增强。对于女孩而言,社交自我知觉下降,其1年后的孤独感显著增强;社交自我知觉稳定组的孤独感显著降低,社交自我知觉上升组的孤独感最低。同伴关系的变化对孤独感的影响因性别而异。     

党政干部自律品质的研究

本文旨在对我国处级党政干部自律品质的内容结构进行探讨,以期能够为我国党政干部的选拔和测评工作提供服务。我们运用自编的处级党政干部自律品质问卷对260名处级党政干部施测,结果发现:(1)处级党政干部自律品质由自我规范性、自我调节性、自我促进性、自我容忍性和自我实现性五个因素构成;(2)自我规范性对处级党政干部自律品质的贡献性最大,其次为自我促进性、自我调节性、自我容忍性和自我实现性;(3)自律品质问卷具有良好的信度和效度,具有一定的推广价值。     

童年中期儿童社会能力与学业成就的交叉滞后研究

本研究采用同伴提名法、问卷法,对武汉市一所小学3、4、5、6年级儿童进行6个月的追踪调查。采用交叉时序滞后设计,考察了同伴关系4个特征水平(群体水平、双向关系水平、人际互动水平和个体特征水平)的变量与学业成就的相互预测关系。结果表明,在控制了前测学业成就后,前测的社会喜好、积极友谊质量、社交领导行为可以分别正向预测后测的学业成就,而前测的攻击行为可以负向预测后期的学业成就;在控制了前测的社交自我知觉后,学业成就可以正向预测后期的社交自我知觉。