Electrocutaneous stimulation II. The estimation of distance between two points

Using a numerical estimation procedure, subjects judged the perceived distance between pairs of brief electrical stimuli presented over different physical distances, on different body regions, and in different spatial orientations. The skin turns out to be anisotropic, with the same physical separation between electrodes appearing greater on the forehead than on the forearm, greater on the forearm than on the abdomen. Perceived distance also depends on the orientation and, to some extent, on the time relation between the two electrical pulses. Under all conditions, the perceived distance between electrical stimuli was “compressed” as compared with visual distance. These results bear on the design of devices that attempt to transmit information by electrical stimulation of the skin.     

Electrocutaneous stimulation L The effects of stimulus parameters on absolute threshold

Thresholds for detecting electrical stimulation were measured as a function of (1) body locus, (2) electrode configuration, (3) stimulus waveform, and (4) pulse duration. The results were: (1) the forehead gave slightly, but not reliably, lower thresholds than the abdomen; (2) concentric electrodes gave slightly, but not reliably, lower thresholds than unifocal electrodes; (3) cathodal monophasic (?) pulses and biphasic pulses (+/? and ?/+) gave identical thresholds, while anodal monophasic (+) pulses gave higher thresholds; and (4) thresholds decreased as pulse duration increased up to .5 msec, but changed less with longer pulses.     

De l'argumentation comme métamorphose

Linguistic rhetoric and argumentative reasoning are generally identified. Certain types of problems, however, make use of non-verbal systems of representation, and, among them, image. Image is not just matter but also form, and computer processing in AI makes it possible to grasp this form by linguistic means (logico-mathematical languages). The synthesis of animated images has made it possible to represent metamorphoses, the thought of the unexpected. The fact that language produces image (and conversely) does not fail to transform the standard ways of thinking about epistemology.

     

The relationship of personality and behavioral development from adolescence to young adulthood and subsequent parenting behavior

The purpose of the study was to examine the association of parental personality, behavior, and substance use during adolescence and adulthood as related to the later parent-offspring relationship. The sample consisted of 297 parents (M age 32 yr.), who were first interviewed at earlier points in their lives in childhood and early adolescence at six points in time, extending from 1983 to 2002. Multiple regression models showed that parents with certain earlier personality and behavioral attributes, e.g., more rebelliousness and more frequent tobacco use, had a more difficult relationship with their children. Findings indicated an association between the cumulative number of psychosocial risk factors in the parents and difficulties in the parent-child relationship. The findings suggested that interventions designed to decrease youths' substance abuse may increase the likelihood that later when they are parents they will form nurturing relationships with their children.     

Anxiety and depression in adolescents in urban and rural China

The goal was to assess rates of anxiety and depression in adolescents in two areas of Zhejiang Province, China. A cross-sectional survey was carried-out using a self-report questionnaire developed for this study. Participants were middle school students (age range 13-16 years) in an urban and a rural setting. There were 1576 completed questionnaires. Symptoms of anxiety sufficient to interfere with enjoyment of life, relaxation, and sleep were common (48%, 40%, and 27%, respectively). School-related problems were the predominant sources of worry. One third reported a history of depression, 16% had at times felt life was not worth living, and 9% reported that they had attempted suicide. Girls were more likely to report symptoms of depression. Patterns of help-seeking showed reliance on friends and parents; only 1% had sought professional help. There were no significant differences in anxiety and depression between one-child and multisibling families.     

Cross-cultural studies of dementia: use of a Chinese version of the Blessed-Roth Information-Memory-Concentration test in a Shanghai dementia survey

A culturally adapted Chinese version of the Blessed-Roth Information-Memory-Concentration test (CIMC) was used in a dementia screening survey of a probability sample of 5,055 elderly Shanghai residents. The individual items on the CIMC that best predicted the overall score were similar to the best predictor of an American version of the IMC. Performance on the CIMC was markedly affected by the level of education or lack thereof. In a subsample for whom clinical diagnoses were obtained, it was possible to establish cutoff values on the CIMC by stratifying the sample according to education.     

空间情境模型建立和更新的影响因素

采用混合实验设计,以含有空间信息的语篇为实验材料,选取不同视空间工作记忆广度的大学生作为被试,利用新的实验范式分离了空间情境模型的建立过程和更新过程,对这两个过程在不同时间模式下的加工特点进行分析,考察了空间情境模型建立和更新的影响因素。研究发现：（1）视空间工作记忆广度影响空间情境模型的建立,但不影响空间情境模型的更新。（2）时间模式既影响空间情境模型的建立又影响空间情境模型的更新。（3）方位对空间情境模型的建立有显著影响,对空间模型的更新没有显著影响。在空间情境模型的建立和更新过程中,前后判断的准确性不易受限时的影响,而左右判断的准确性则易受到限时的影响而显著降低,前后方位效应具有稳定性和优势性     

互联网使用动机、行为与其社会-心理健康的模型构建

以581名大学生为被试,采用结构方程模型技术构建了互联网使用动机、病理性互联网使用行为与其相关社会-心理健康的关系模型。其中,互联网使用动机包括信息获取性动机和人际情感性动机两种模式;病理性互联网使用行为包括上网冲动性、分离/逃避和网上优越感三个初级因素;互联网相关社会-心理健康包括孤独感、社会参与度、一般抑郁、生活幸福感和生活满意度五个初级因素,并进一步概括为社会健康和心理健康两个维度。研究结果表明,基于信息获取性动机而使用互联网有助于相关社会-心理健康水平的提高;基于人际情感性动机而使用互联网更容易导致病理性互联网使用行为,并由此对使用者的社会-心理健康产生负面影响;大学生使用互联网的积极效应大于消极效应,且信息获取性动机对社会健康具有更大的积极效应,而人际情感性动机对对心理健康具有更大的消极效应     

工作记忆广度与汉语句子语境效应的关系

采用计算机快速系列视觉呈现技术,以反应时为指标,利用命名法,从工作记忆容量个体差异的角度,探讨汉语句子阅读中的语境效应。本研究将句子的语境效应分为两个来源：一个是自动激活扩散的词汇之间的语义启动,另一个是相互作用的句子水平的主题启动。结果表明：词汇间的语义启动不受工作记忆容量的影响,并且不易受到无关记忆任务的干扰。句子水平的主题启动会受到工作记忆容量的影响：工作记忆广度较高的读者能出现主题水平的语境效应,但是在无关记忆任务的干扰下,句子主题水平的语境效应消失;低广度的读者在无外部记忆负荷和有外部记忆负荷两种条件下都没有出现主题水平的语境效应。工作记忆容量对那些需要较多认知资源的加工过程产生显著的影响,实验结果符合工作记忆容量限制理论