Two asymmetries governing neural and mental timing

Mental timing studies may be influenced by powerful cognitive illusions that can produce an asymmetry in their rate of progress relative to neuronal timing studies. Both types of timing research are also governed by a temporal asymmetry, expressed by the fact that the direction of causation must follow time's arrow. Here we refresh our earlier suggestion that the temporal asymmetry offers promise as a means of timing mental activities. We update our earlier analysis of Libet's data within this framework. Then we consider the surprises which often occur on those rare occasions when neural timing experiments parallel mental timing work exactly. Together, these surprises and asymmetries prescribe a relentlessly meticulous and fully transparent exposition of timing methods, terms, and concepts which shuns plausible narratives, even when buttressed by rigorous formal models, unless guided by opposite empirical evidence.     

A review of teen-tot programs: comprehensive clinical care for young parents and their children

Comprehensive clinical programs for teenage mothers and their children, also known as teen-tot programs, have been a promising intervention to improve outcomes of teenage childbearing and parenting. However, much remains unknown regarding the efficacy of such programs. We reviewed four published evaluations of programs that provided medical care, counseling, contraception, guidance for parenting, and assistance with staying in school. The evaluations reported moderate success in preventing repeat pregnancies, helping teen mothers continue their education, and improving teen and infant health over 6 to 18 months. However, the evaluations had limitations that may have reduced or accentuated observed effectiveness. Teen-tot programs will continue to face the challenges of sustaining adequate long-term interventions and evaluations, and reducing the high attrition rate among program participants. It is concluded that increased support and funding for teen-tot programs and more complete evaluations are warranted.     

Chunking mechanisms in human learning

Pioneering work in the 1940s and 1950s suggested that the concept of 'chunking' might be important in many processes of perception, learning and cognition in humans and animals. We summarize here the major sources of evidence for chunking mechanisms, and consider how such mechanisms have been implemented in computational models of the learning process. We distinguish two forms of chunking: the first deliberate, under strategic control, and goal-oriented; the second automatic, continuous, and linked to perceptual processes. Recent work with discrimination-network computational models of long- and short-term memory (EPAM/CHREST) has produced a diverse range of applications of perceptual chunking. We focus on recent successes in verbal learning, expert memory, language acquisition and learning multiple representations, to illustrate the implementation and use of chunking mechanisms within contemporary models of human learning.     

An event-related potential evaluation of involuntary attentional shifts in young and older adults

Involuntary shifts in attention to irrelevant stimuli were studied in elderly and young volunteers during a dichotic-listening task. Event-related potentials and behavioral measures were recorded. Volunteers heard pairs of tones presented with 2 different stimulus onset asynchronies (SOAs). To-be-ignored tones were presented to the left ear, followed by to-be-attended tones to the right ear. Left-ear tones were a frequent standard (700 Hz) and an infrequent small (650 Hz) and large (500 Hz) deviant. Right-ear tones (1500 Hz) were presented with 2 equiprobable intensities. Volunteers responded to the lower intensity stimulus. Behavioral performance was impaired at the short SOA when to-be-ignored large deviants preceded to-be-attended targets, but more so for the elderly volunteers. Large deviants also elicited the mismatch negativity (MMN) and P3a for both age groups. It was concluded that the more impaired behavioral performance observed for the elderly was due to greater sensitivity to output from the MMN system by a frontal lobe system responsible for the maintenance of attentional focus.     

Attributional Style and Personality as Predictors of Happiness and Mental Health

This paper contains two studies which set out to examine to what extent attributional style (internal, stable, global) and personality traits predicted happiness and psychiatric symptoms in a normal, non-clinical, population of young people in their early twenties. Two hundred and three participants completed five questionnaires: the Attributional Style Questionnaire (ASQ) (version one & version two), Eysenck Personality Questionnaire, Oxford Happiness Inventory, and Langner 22-Item Measure. Sample 1 (n = 120) completed ASQ version one (in both positive and negative situations) and sample 2 (n = 83) completed ASQ version two (in expanded negative situations). Regressional analysis showed that ASQ (in both versions) was the significant predictor of happiness and mental health accounting for 20% to 38% of variances. The ASQ was significantly associated with extraversion and neuroticism. Further, with happiness and mental health as dependent variables and attributional style, personality traits, and demographic variables as independent variables respectively, extraversion and attributional stability (in positive situations) were the significant predictors of happiness accounting for 59% of the total variance whilst neuroticism and psychoticism were the significant predictors of mental health accounting for 53% of the total variance. The results indicated that optimistic attributional style in positive situations was a stronger predictor of self-reported happiness than mental health and pessimistic attributional style in negative situations was a predictor of both happiness and mental health. Extraverts tended to have optimistic explanatory style for positive outcomes whereas neurotics tended to have pessimistic explanatory style for negative outcomes.     

When is a cause the "same"? Coherent generalization across contexts

Two competing psychological approaches to causal learning make different predictions regarding what aspect of perceived causality is generalized across contexts. Two experiments tested these predictions. In one experiment, the task required a judgment regarding the existence of a simple causal relation; in the other, the task required a judgment regarding the existence of an interaction between a candidate cause and unobserved background causes. The task materials did not mention assessments of causal strength. Results indicate that causal power (Cartwright, 1989; Cheng, 1997) is the mental construct that people carry from one context to another.     

环境因素与出生缺陷

出生缺陷是严重影响出生人口素质的重要因素之一。引起出生缺陷的因素分为遗传因素和环境因素,单纯由遗传因素或环境因素引起的出生缺陷不到其总数的1/3,另外2/3以上的出生缺陷是由遗传因素和环境因素共同作用所导致的。因此,只有不断深入研究和认识导致出生缺陷发生的原因,辩证地分析不同环境因素在出生缺陷中的作用,才能采取相应的预防和治疗措施,这对于提高出生人口素质具有十分重要的现实意义。     

从热力学角度审视和研究亚健康

从中医学及其与热力学的关联分析角度来认识亚健康的现象和实质."整体观念,以平为期"是中医学与热力学共同的理论基础.亚健康是人体处于"无序"的熵增状态,亚健康的干预就是人体从外界吸收"负熵流",降低系统紊乱度,从而达到新的有序状态,恢复健康.亚健康状态可以用热力学基本状态函数刻画,运用中医学的思维模式和热力学的研究方法,可构建基于热力学的亚健康诊断方法,进而为亚健康研究提供一个新的视角.     

防范医疗纠纷的载体建设——天津市人民医院投诉中心的绩效浅析

利用现代医学伦理的人本理念,将投诉中心作为防范医疗纠纷的载体,有效地解决就医者的投诉接待和处理,无疑是一种全新的理念和尝试.通过对投诉制度建设、投诉处理标准化流程、有效投诉信息的利用等方面的经验性论述,阐明了投诉中心的载体建设,为减少医疗纠纷、加强伦理道德建设、构建和谐的医患关系产生了积极的作用.     

小学生快速阅读的眼动研究

用自然实验和实验室实验考察了对小学四年级学生进行快速阅读训练的有效性,结果发现：（1）快速阅读训练可以显著地提高小学生的有效读速;（2）快速阅读训练可以显著减少注视次数、注视点平均持续时间;（3）快速阅读训练可以显著扩大眼跳距离。