Analysing driver’s decision in dilemma zone at signalized intersections under disordered traffic conditions

Delay in the decision-making process of stop or go during the amber phase of the signal cycle often leads to abrupt hard deceleration or red light violations at signalized intersections. The indecisiveness or the dilemma in decision making often results in compromised safety of the road users. The present study attempts to analyze the driver’s behaviour in order to make the decision of stop or go and developed a binary logistic regression model while considering different traffic behaviour parameters exhibited and observed after the onset of the amber phase. Empirical vehicular trajectory data from three signalized intersections covering 121 signal cycles and 1347 vehicles are used in the study. The study presents two dilemma zone identification models based on distance from the stop line, focusing on easy-to-use and static driver assistance and dynamic-realtime driver assistance systems. Both the models are observed to show good fit and prediction accuracy. The models are validated internally and externally for their adaptability in the field. The effect of different traffic parameters on the dilemma zone is explored, and a possible real-time application of the dynamic model as a driver assistance system in decision-making is explored.     

Do We Need Toleration as a Moral Virtue?

In this essay, I reconstruct tolerance as a moral virtue, by critically analysing its definition, circumstances, justification and limits. I argues that, despite its paradoxical appearance, tolerance qualifies as a virtue, by means of a restriction of its proper object to differences that are chosen. Since this excludes the most important and divisive differences of contemporary pluralism from the scope of the virtue of tolerance, the moral model of toleration cannot constitute the micro-foundation of the corresponding political practice. However, if the political ideal of toleration must be founded on independent political reasons of justice, the moral model can bridge the gap between private morality and public reason, providing citizens with moral motives to supplement the political obligation to neutrality. This revised version was published online in August 2006 with corrections to the Cover Date.     

The effect of in-vehicle warning systems on speed compliance in work zones

The purpose of this research was to evaluate the effectiveness of augmented in-vehicle speed warnings on driver behavior in work zones. The influence of three device configurations were examined as the drivers entered a work zone which was presented in a simulated driving environment. The first configuration was a control condition which used only traditional signage. The second condition had the addition of a visual in-vehicle warning while the final condition had the addition of an auditory in-vehicle warning. Results indicated that adding in-vehicle warnings did affect driver compliance to the work zone speed limit. Participants in the audio warning condition responded more quickly to the warning than those in the visual condition. Both augmented warning configurations differed significantly and were each respectively different from the drivers in the control condition. Based on these results we suggest a combination of in-vehicle warnings. Upon entry of the work zone we suggest a combined audio and visual warning message. However, after the initial entry phase, a visual warning message shows greater promise for the on-going modulation of driver speed transit.     

A New Border Zone in Science. Collaboration and Tensions between Modelling Ecologists and Field Naturalists

Modelling ecologists have entered ecology labs. They need large quantities of data to improve their models and are eager to collaborate with field naturalists. This modifies existing relationships between these two groups of natural scientists who have different ways of knowing. We observed how a new border zone was being opened up between modelling ecologists and field naturalists working in a National Botanical Conservatory in France. After an arduous start, due to the initial reluctance of the field naturalists, the modelling ecologists and the field naturalists performed several activities together: they transformed existing data, produced new data, interpreted all these data, articulated research questions and hypotheses. They also created a hybrid database, mixing data from different sources, and they co-authored papers. This clearly changed the professional status of the field naturalists, who felt they were finally treated as genuine research partners. Yet, the modelling ecologists and the field naturalists remained as two distinct groups, with their specific practices, aims, skills and identities. Although collaboration was considered a clear success from both sides, there were some lingering tensions. The field naturalists were still somewhat wary of being downgraded to the status of mere data providers. They were therefore determined to see to it that their work and way of knowing would receive due recognition in the long run.     

Hide-and-seek around the centre of interest: The dead zone of attention revealed by change blindness

Three experiments examined spatial allocation of attention during active search for visual changes. In all experiments, there were three conditions of change location related to a centre of interest: (1) Central (most attended location itself), (2) near, and (3) far marginal change. In Experiment 1, participants showed the slowest search and the largest number of undetected changes in near condition. Moreover, they misidentified near changes more frequently than central and far ones. In Experiment 2, participants had to search for marginal changes in the presence of a once noticed central change that summoned additional attention to a central location. It resulted in further search slowing for near changes. In Experiment 3, participants searched for one of two concurrent marginal changes in the presence of a central one. They detected far changes about 2.3 times more frequently than near ones. Taken together, these results support the notion of “dead zone of attention” surrounding attentional focus. Several speculations about the nature of dead zone are discussed.     

儿童认知发展水平诊断工具IPDT的动态化编制及其在低社会经济地位儿童中的应用

“皮亚杰认知发展量表” (IPDT)中的守恒与关系领域经动态化改编后已被证实适用于小学低年级儿童的潜能评估。在此基础上, 本研究旨在构建适用于小学高年级儿童的IPDT表征、分类、规律领域的动态测验; 并运用所构建的IPDT动态测验对低社会经济地位(SES)儿童进行认知潜能评估; 而后经过对低SES儿童的推理认知干预, 进一步考查认知干预在低SES不同潜能儿童的认知能力和数学成就中的促进作用。结果发现：(1)改编的IPDT表征、分类、规律领域的动态测验包含“前测—干预—迁移—后测”4个阶段, 所构建的逐级提示干预方案合理适切, 可以有效区分不同认知潜能水平的小学高年级儿童, 特别是弱势儿童; (2)推理认知干预对由IPDT动态测验细致区分出的不同潜能水平的低SES儿童作用不同, 尽管他们在认知能力与数学成就上均有进步, 但低SES高潜能儿童比低SES低潜能儿童从干预中获益更多。     

促进当事人的改变：基于治疗性最近发展区的视角

作为心理治疗的有效区域,治疗性最近发展区是指当事人当前适应问题经验的能力和通过治疗师的协助能够达成的潜在能力之间的距离。早期的同化模型理论更注重对心理治疗改变过程的描述,治疗性最近发展区理论则能够进一步解释治疗师在不同阶段的帮助策略。在研究上,治疗性最近发展区理论建立在非传统的方法论基础上,通过不断累积个案的质性研究,帮助治疗师理解和解释不同咨询效果的互动过程,并使理论得到持续发展;在临床上,治疗性最近发展区为理解心理治疗过程中倒退现象提供了新视角,并能够有效指导在治疗过程中采取挑战性还是支持性策略。未来研究可从临床上探索经验丰富的治疗师的实践智慧,也可选取较大跨度的治疗对话序列,对不同流派的特点,从不同参与者的视角出发进行研究,进而深化对心理治疗过程机制的理解。     

Gottfredson的职业抱负发展理论简介与研究评述

戈特弗雷德森（L.S.Gottfredson）的职业发展理论是有关职业抱负的内容及其发展的理论。该理论从职业类型、社会地位和性别类型3个维度对职业抱负的发展进行了论述,并提出了职业抱负的发展阶段论和决策过程中的妥协论。该文首先对戈特弗雷德森的职业抱负的发展理论做了简要介绍,然后从职业抱负的范围限定和妥协过程两个方面对已有的有关研究进行了回顾,并提出了已有研究中存在的问题和不足,最后论述了职业抱负发展理论在学校职业辅导中的应用     

Biased extensive measurement: The homogeneous case

In the homogeneous case of one type of objects, we prove the existence of an additive scale unique up to a positive scaling transformation without transitivity of indifference and with a property of homothetic invariance weaker than monotonicity. The representation, which is a particular case of a semiorder representation, reveals a unique positive factor α?1 that biases extensive structures and explains departures from these standard axioms of extensive measurement (α=1). We interpret α as characterizing the qualitative influence of the underlying measurement process and we show that it induces a proportional indifference threshold.