脑死亡立法的艰难与中国传统文化

因中国传统伦理文化对人们意识观念的深刻影响导致中国脑死亡立法步履艰难。从中国传统文化视角分析中国的脑死亡及相关伦理问题,提出中国脑死亡诊断标准的制定必须充分考虑民族心理感受,要立足于民族文化理性地探索“中国脑死亡”。     

Effect of task presentation on students’ performances in introductory statistics courses

Research on academic learning indicates that many students experience major difficulties with introductory statistics and methodology courses. We hypothesized that students’ difficulties may depend in part on the fact that statistics tasks are commonly viewed as related to the threatening domain of math. In two field experiments which we carried out in the ecological context of introductory statistics courses, the representation of a statistics task administered to undergraduate students in Psychology (Study 1; n = 127) and Biology (Study 2; n = 166) was manipulated. In both studies we found that students who reported the least favorable prior attainments in math had their performance thwarted when the task was presented as related to the math domain, whereas no performance impairment was observed when the task was presented as related to the verbal/linguistic domain. Implications of the findings for the design and delivery of introductory statistics and research methodology courses are discussed.

手书运动分析及其在书写困难中的研究

手书运动分析被广泛地用于正常手书的运动控制机制和各种精细运动障碍的潜在病理研究.本文回顾了手书运动分析的基本原理,使用仪器,采用的运动参数,手书的模式和任务,以及影响手书运动分析的各种因素,并且重点回顾了手书运动分析在书写困难中的可信度,诊断和干预疗效研究.这种基于手书过程的分析技术能够揭示书写困难的潜在病理机制,弥补了传统的基于书写结果分析的评估法的缺陷.手书运动分析不仅可以运用于精细运动障碍人群的病理机制探讨,而且可用于其他特殊人群认知特点的研究.     

Why is it so hard to do my work? The challenge of attention residue when switching between work tasks

In many jobs, employees must manage multiple projects or tasks at the same time. A typical workday often entails switching between several work activities, including projects, tasks, and meetings. This paper explores how such work design affects individual performance by focusing on the challenge of switching attention from one task to another. As revealed by two experiments, people need to stop thinking about one task in order to fully transition their attention and perform well on another. Yet, results indicate it is difficult for people to transition their attention away from an unfinished task and their subsequent task performance suffers. Being able to finish one task before switching to another is, however, not enough to enable effective task transitions. Time pressure while finishing a prior task is needed to disengage from the first task and thus move to the next task and it contributes to higher performance on the next task.     

Counterproductive Behaviors and Psychological Well-being: The Moderating Effect of Task Interdependence

Purpose  The purpose of this study was to investigate the relationship between counterproductive behaviors (CPBs) and psychological well-being in a teamwork setting. Moreover, we examined the moderating effect of task interdependence. CPBs are considered in light of four dimensions, namely parasitism, interpersonal aggression, boastfulness, and misuse of resources. Design/Methodology/Approach  Data were collected from a sample of 249 individuals working in a Canadian prison. The study was based on two measurement times. Findings  The results reveal that the four dimensions of CPBs are negatively related to psychological well-being and that relationships involving interpersonal aggression and boastfulness are moderated by task interdependence. Implications  This study highlights the importance for managers to identify the presence of CPBs in their team as soon as possible so as to be able to remedy them before they affect team members’ psychological well-being. Moreover, interpersonal aggression and boastfulness may be particularly detrimental in a context of high interdependence. Originality/Value  This study further extends the nomological network of CPBs. Indeed, the results indicate that the presence of CPBs may harm employees’ mental health. Furthermore, this study shows that a contextual characteristic (i.e., task interdependence) may amplify the detrimental effect of some CPBs.

老龄化社会中ICU的困境面面观

高龄、且长期罹患多种疾病的患者,病情一旦进展到必须接受有创机械通气的阶段,则康复机会极小,生存质量极差,不应划入急性可逆性范畴;而应转入社区医疗,加强现代健康观、死亡观教育,提供多种解决方案,不必一概纳入全方位支持监护系统,更不应常规给予有创机械通气、CRRT、亚低温治疗、肠内及肠外营养作为长期替代治疗。     

Adapting to changing memory retrieval demands: Evidence from event-related potentials

This study investigated preparatory processes involved in adapting to changing episodic memory retrieval demands. Event-related potentials (ERPs) were recorded while participants performed a general old/new recognition task and a specific task that also required retrieval of perceptual details. The relevant task remained either constant or changed (predictably or randomly) across trials. Responses were slowed when participants switched from the specific to the general task but not vice versa. Hence, asymmetrical switch costs were observed, suggesting that retrieval preparation is dependent not only on the current retrieval goal but also influenced by recent retrieval attempts. Consistently, over posterior scalp regions ERPs associated with advance preparation were modulated by the preceding task, reflecting increased attentional selection requirements for the general task, and by the foreknowledge about the task sequence. When retrieval demands remained constant, frontal slow-waves elicited by retrieval-cues were more positive going for the specific task, indicating full implementation of a retrieval orientation that allows more efficient retrieval of perceptual details.     

基于多Agent的运动图像匹配任务分配策略研究

本文针对基于多Agent的运动图像匹配系统的任务分配策略进行了讨论,并结合遗传算法和模拟退火算法给出了一种新的基于多Agent的运动图像模式匹配系统的任务分配策略。     

Concurrent visual search and time reproduction with cross-talk

Previous experiments indicate that humans can reproduce a time interval while concurrently searching a visual display presented near the beginning of the reproduced interval (Fortin, C., Rousseau, R., Bourque, P. & Kirouac, E. (1993). Time estimation and concurrent nontemporal processing: Specific interference from short-term-memory demands. Perception & Psychophysics, 53, 536-548.). In the earlier experiments, reproduced intervals were either insensitive to or shortened with increasing duration of visual search, suggesting that reproduction and search proceeded concurrently but sometimes with cross-talk. Here we test concurrency of time reproduction and visual search using a different methodology than before. Assuming the underlying mental processes are in a critical path network, factors selectively influencing concurrent processes are predicted to produce certain patterns in response time means and, through recent developments, certain patterns in cumulative distribution functions. Processes in an experiment were influenced by manipulating four factors, the time interval to be produced, stimulus onset asynchrony, display size, and target presence/absence. Patterns in response times provide evidence for concurrent time reproduction and visual search. However, a prediction based on selective influence failed in a manner suggesting the presence of cross-talk produced by a filled interval illusion.