The assessment of recognition memory using the Remember/Know procedure in amnestic mild cognitive impairment and probable Alzheimer’s disease

This study used the Remember/Know (R/K) procedure combined with signal detection analyses to assess recognition memory in 20 elders with amnestic mild cognitive impairment (aMCI), 10 patients with probable Alzheimer’s disease (AD) as well as matched healthy older adults. Signal detection analyses first indicated that aMCI and control participants were comparable on general recognition performance. As regards AD patients, they were impaired relative to both aMCI and healthy elders. When assessing Remember and Know responses the aMCI group showed diminished sensitivity for Remember responses but intact Know responses compared to healthy elders. In contrast, AD patients showed decreased sensitivity for both Remember and Know responses compared to control and aMCI participants. The response bias index revealed that AD patients were more liberal than aMCI and control participants when providing Know responses. On the other measures, response bias was comparable between the groups. Overall, this study indicates that the R/K procedure can characterize different aspects of recognition memory performance in persons with aMCI or AD.     

Global Model Analysis of Cognitive Variability

Residual fluctuations produced in typical experimental methodologies are examined as correlated noises. The effective range of the correlations was assessed by determining whether the decay over look-back time is better described as a power law or exponential. Both of these decay laws contain free parameters and it is argued that it is not possible to distinguish their models on the basis of simple measures of goodness-of-fit. Global analyses that evaluate models on the basis of how well they generalize are conducted. The models are examined in terms of three constructs that all bear on generalization: cross-validity, flexibility, and representativeness. Quantitative assessment of a large ensemble of data suggests that the correlations decay over time as a power law. The conclusion is that human residual fluctuation is a correlated fractal.     

Functional Consequences of HIV-Associated Neuropsychological Impairment

This review focuses on the “real world” implications of infection with HIV/AIDS from a neuropsychological perspective. Relevant literature is reviewed which examines the relationships between HIV-associated neuropsychological impairment and employment, driving, medication adherence, mood, fatigue, and interpersonal functioning. Specifically, the relative contributions of medical, cognitive, psychosocial, and psychiatric issues on whether someone with HIV/AIDS will be able to return to work, adhere to a complicated medication regimen, or safely drive a vehicle will be discussed. Methodological issues that arise in the context of measuring medication adherence or driving capacity are also explored. Finally, the impact of HIV/AIDS on mood state, fatigue, and interpersonal relationships are addressed, with particular emphasis on how these variables interact with cognition and independent functioning. The purpose of this review is to integrate neuropsychological findings with their real world correlates of functional behavior in the HIV/AIDS population.     

The effects of total sleep deprivation on recognition memory processes: A study of event-related potential

This study examined the memorization of information after a night of normal sleep and total sleep deprivation (TSD) by means of event-related potentials (ERPs). We expected a disfacilitatory effect of TSD on memory processing. Eighteen subjects were tested twice in a counterbalanced fashion. During the study session, subjects were presented with unfamiliar face stimuli and asked to memorize them for a subsequent memory test. At the test session, the subjects were presented with the studied faces intermixed with “new” faces and asked to indicate the previously presented stimuli. The N100 was used as a covariate to control for the differences in level of vigilance between the two sessions. Sleep deprivation decreased subjects’ ability to discriminate new from previously studied stimuli and decreased the peak amplitude of the early component (N200) to the decrement of performance. In addition, following TSD the amplitude of the late frontal component (LFC), which is thought to reflect contextual processing, was decreased in covariance with the N100 vigilance component. The amplitude of the late posterior component (LPC/P600) was also reduced but was unrelated to the vigilance component of the ERP. Based on prior studies, this LPC reduction can be interpreted to indicate a decrease in information retrieved after TSD. In summary, a night of TSD decreased the amplitude of the ERPs associated with complex episodic memory task stimuli, affected the frontal cortex during episodic retrieval, and prevented the elaboration process. Furthermore, there was an inability to discriminate what is and what is not in memory, possibly due to less local processing of details.     

How individualism–collectivism orientations predict happiness in a collectivistic context

We discuss how individualistic/collectivistic orientations of employees predict affective well-being at work, and how this relationship is moderated by the perceptions of spirit of camaraderie in organizations. The sample comprises 161 employees of 109 organizations operating in Portugal, a collectivistic culture. The findings suggest that: (a) collectivistic individuals show higher affective well-being than individualists; (b) this relationship is moderated by the employees’ perceptions of the spirit of camaraderie in their organizations; (c) higher affective well being levels tend to be experienced by collectivists who find working in an organizational context to be rich in spirit of camaraderie, and lower levels of affective well being are expressed by individualists who perceive poor spirit of camaraderie in their working environments. The paper emphasizes that employee happiness can have different bases in different cultures and that individualism/collectivism orientations do not operate in the same way in different cultural and organizational contexts. We are very grateful to the three anonymous reviewers for their helpful comments and suggestions.     

Zhuangzi the Poet: Re-Reading the Peng Bird Image

The image of the Peng bird, which opens the Zhuangzi text, is not the product of metaphysical reasoning. An inspiring example of soaring up and going beyond, the image is used to broaden the outlook of the small mind; its function is thus more therapeutic than instructional. With its rich poetic and experiential content, the image of the Peng refuses to be reduced to an abstract concept, or a mere signifier of certain philosophical position. Misreading of the image results from any attempt to accurately “size up” its philosophical implication by measuring it quantitatively against a spectrum of positions and values. To see only the superficial “inconsistencies” in Zhuangzi’s argument and to read the wind under the Peng’s wings as a handicap that it needs to overcome in order to embark on its “free and easy wandering” is, in the name of logic and “consistency,” to ignore the big picture Zhuangzi presents.     

自我和他人的协调与心理理论的神经机制

有关心理理论神经机制的研究远未达到共识。从自我与他人协调的角度看,可认为它是一个由多脑区有机组织而成的系统。自我中心化偏差是人类认知的一种默认选择,要正确理解他人的心理状态,需要抑制自我中心偏差。因此,心理理论的加工至少包括以下几个不同的过程：通过模拟自我理解他人,相应的加工脑区为镜像神经元系统;从他人与客体形成的二元关系中表征心理状态的内容,相应脑区是颞顶联合区;对模拟自我进行抑制,相应脑区为背外侧额叶;以及整合协调以上几个过程,其脑区可能是内侧前额叶     

What Do Happiness Studies Study?

What do, or should, happiness studies study? Everything to which we refer with the word ‘‘happiness’’ is worth some study. But the study of subjective states covers only part of the ground covered by the word ‘‘happiness’’ and by no means all the ground central to understanding happiness. On the central use of ‘‘happiness,’’ to be happy is to be glad or satisfied or content, which suggests subjectivity, with having a good measure of what is important in life, which suggests objectivity. We find the same suggestion of both subjectivity and objectivity in the list of what enhances the quality of life. There are strong arguments in favour both of the subjectivity of what enhances life and of its objectivity. I argue that neither is right, that the story is more complicated. The conclusion of the story is that there is a list of several non-reducible features that contribute to the quality of a characteristic human life, and that anything that contributes to the quality of any human life will be one or other of these features. But there is a problem. When we speak of the quality of a human life, there may be no one thing we have in mind. Perhaps some of us are not disagreeing with one another over the nature of a ‘‘happy’’ life but speaking of different things.     

小学儿童情绪认知发展研究

本研究采用故事情境法探究小学儿童情绪认知的发展。随机抽取60名小学儿童（2、4、6年级各20名）,研究他们对五种不同的情绪状态识别、情绪原因认知、情绪外在行为表现认知以及对情绪后继调节方式的认知发展特点。结果发现：总体而言,情绪认知在小学不同年级有明显发展;基本情绪认知最好,其次是积极自我意识情绪认知和冲突情绪认知,对消极自我意识情绪的认知最差;情绪识别和情绪原因认知明显好于情绪行为认知和情绪调节认知;对情绪表现者的情绪认知明显好于对情绪接受者的情绪认知。     

青少年自我同一性发展研究

本研究以小学至高中阶段的青少年为研究对象,使用自我同一性状态客观测量的标准化问卷,对青少年的自我同一性发展规律进行分析,研究结果发现,自我同一性的发展是一个逐渐变化的过程,其中,初中是一个很重要的阶段;同时,自我同一性的发展在不同领域问表现出发展不同步的现象,人际关系领域发展比意识形态领域较早;另外,自我同一性发展受地区、性别角色等因素影响。