The impact of a child bike seat and trailer on the objective overtaking behaviour of motorized vehicles passing cyclists

IntroductionThe lateral clearance distance of a motorized vehicle while overtaking a cyclist is a key indicator of safety. This lateral clearance distance has never been measured for cyclists transporting a child. Therefore the aim of this study was to investigate the behaviour of motorized vehicles in overtaking cyclists with and without a child on the same bicycle.MethodsThe lateral clearance distance of the overtaking manoeuvres of motorized vehicles was measured using an instrumented bicycle when performing 19 cycling trips on one single road with two different types of cycling infrastructure (a bike lane and shared lane marking) in the Brussels Capital Region (Belgium). Mixed effect regression was used to examine the effect of cycling condition (cyclist without a child [control], cyclist with a child bike seat and cyclist with a child bike trailer) and secondary independent variables (i.e. cycling infrastructure, peak traffic hours and traffic density) on the lateral clearance distance.ResultsThe mean lateral clearance distance in ‘cyclists without child’ was significantly smaller (117.3 cm) than in ‘cyclists with child’ (128.8 cm) (95%CI [7.2;15.9]). Looking at ‘morning peak traffic hours’ (i.e. 7:00 to 9:00 a.m.) a cyclist with child bike seat was overtaken at greater lateral clearance distances than a cyclist with a child bike trailer or a cyclist without child (p=0.041). Furthermore, the percentage of passing manoeuvres under 100 cm was significantly higher in ‘cyclist without child’ (35.3%) in comparison to ‘cyclist with child bike seat’ (21.8%) and ‘cyclist with child bike trailer’ (21.8%) (Chi2=29.19, p<0.001). No significant differences were found between a shared lane marking and bike lane.ConclusionDrivers of motorized vehicles do adapt their overtaking manoeuvre when they overtake cyclists transporting a child, keeping greater and therefore safer lateral clearance distances. In morning peak traffic hours and/or crowded circumstances the child bike seat can be considered as the safest way to transport a child in terms of lateral clearance distance. In general, with 25.3% overtaking manoeuvres under 100cm, police should monitor compliance with the traffic rules with regard to cyclists, and motorists should be more aware of the overtaking traffic rules.     

对威胁刺激的碰撞时间估计

对靠近运动刺激的碰撞时间(time-to-collision, TTC)估计具有重要的进化意义。为了解释个体如何进行TTC估计, 研究者提出了结构主义理论、生态光学理论和tau理论等, 也考察了影响TTC估计的部分因素。近年的研究通过比较个体对威胁刺激和非威胁刺激的TTC估计, 考察了刺激的情绪相关属性对TTC估计的影响。结果表明, 相比于自然非威胁刺激(如兔子等图片), 个体会低估自然威胁刺激(如蛇等图片)的TTC, 但这种TTC的低估在社会威胁刺激(如愤怒面孔图片)上有时很小甚至不显著。个体低估TTC可能存在三种原因：(1)个体对威胁刺激具有特异性反应; (2)威胁刺激具有较高的情绪唤醒度; (3)个体对威胁刺激具有心理距离更近和运动速度更快的知觉偏差。未来研究可以进一步考察在社会威胁刺激上表现出的TTC低估效应不稳定的原因; 探索威胁刺激TTC估计中的自主生理反应和神经机制; 采用虚拟现实技术进行威胁刺激TTC估计的研究; 在实验设计中考虑性别和人格特质等个体因素的影响。     

领导人际情绪管理和员工建言的关系：有调节的中介效应分析

近年来,领导人际情绪管理（LIEM）作为一种管理和调节下属消极情绪的领导行为正逐渐受到学界关注。本研究通过问卷调查,搜集了314份员工和领导的配对数据。研究结果显示：领导人际情绪管理积极影响员工建言行为;下属信任在领导人际情绪管理和员工建言行为间起到部分中介作用;权力距离对下属信任的中介效应起到调节作用。     

Positive intergroup contact decreases the likelihood that prejudicial attitudes become avoidant behavioral tendencies

We investigated whether existing intergroup contact experiences moderated the associations between prejudicial attitudes and behavioral tendencies towards outgroups across five studies in Turkey (total N = 1,281). Findings showed that among Turks who reported higher levels of cross-group friendship quantity (Study 1) and greater positive (but not negative) contact (Study 2) with Kurds, prejudicial attitudes did not predict negative outgroup behavioral tendencies. Confirming these studies, Study 3 indicated that the association between homophobic attitudes and outgroup avoidance/approach tendencies was weaker among individuals who reported more LGBTI friends. Study 4 replicated the latter finding among children using Syrians as the target outgroup. Study 5 further showed that the buffering role of intergroup contact occurred only among participants who held less certain attitudes towards Syrian refugees. Findings provide insights into how existing contact experiences shape the relationship between negative attitudes towards outgroups and relevant behavioral intentions.     

The effect of imperfect memory recall on risk preferences

People often take on different levels of risk when deciding on future actions compared with when they take actions with immediate consequences. The presently reported research investigated how imperfect recall of previously chosen options influences temporal fluctuations in risk preferences. In two incentivized studies with a waiting time before decision resolution (a 4-week waiting period from an initial decision), we observed that errors in the recall of previous choices played a substantial role in constructing risk preferences for choices that are usually resolved after a delay. More specifically, in a first study, we found that after a waiting period (i.e., after participants waited for their risky choices to be resolved), participants perceived that they took less risk during their initial choices than they actually did. Importantly, when asked about whether they would change their initial choices, participants declared that they would take riskier choices. In a second study, we tested directly whether such a shift in initial choices could also be demonstrated behaviorally. Results revealed that after beliefs about past choices were induced, participants changed their risk preferences in line with the information presented during belief induction.     

The Significance of Contingency and Detours in Hans Blumenberg’s Philosophical Anthropology

Although time was a predominate theme in Continental philosophy for the first half of the twentieth century, philosophical attention has increasingly shifted to space. This paper contributes to the phenomenology of space through Hans Blumenberg’s philosophical anthropology. Blumenberg elucidates the significance of phenomenological distance for the contingent existence of humans. Spanning from the experience of early human ancestors to history and epistemology, Blumenberg’s work reveals how contingency pervades human existence. Blumenberg understands names, myths, rhetoric, and metaphors as cultural techniques that function as means of self-preservation by distancing an overwhelming and disorienting reality and managing the felt contingency of human existence. Developing upon Blumenberg’s insights into human contingency and distance, the paper argues that detours offer a way to address the contemporary, existential issues posed by the increasing rate of technological change and environmental problems.     

“为逐利而追名”：社会观察和社会距离对亲环境行为的影响

研究采用绿色消费范式考察社会观察对亲环境行为的影响以及社会距离的作用。实验1探讨有、无互惠的社会观察对亲环境行为的影响。结果发现无互惠的社会观察未对亲环境行为产生影响;而有互惠的社会观察条件下的亲环境行为大于无观察条件（控制条件）。实验2探讨社会距离和有互惠的社会观察对亲环境行为的影响。结果发现,当环境结果的承担者指向熟人和陌生人时,有互惠的社会观察条件下的亲环境行为大于控制条件,而当环境结果的承担者指向密友时无此差异。这些结果说明,社会观察情境下人们为了在将来获益,会出于名誉的策略考虑而做出更多的亲环境行为,而社会距离在其中起着调节作用。     

Failure to find a distance effect in pigeon choice: Manipulating amount and delay of reinforcement

The choice behavior of primates, including humans, displays a distance effect: Latency to choose between alternatives appears to increase with smaller differences in value. There is, so far, no demonstration of this effect in birds. Tests of distance effects in birds have been conducted in binary choice situations with a dominant alternative, where one alternative is superior to the other in all aspects that meaningfully contribute to value (e.g., provides access to the same reinforcer, but with a shorter delay). The present study considers the possibility that including dominant alternatives in choice tests precludes distance effects. Four pigeons were presented with binary choices between alternatives that varied in amount and delay. Some choices had a dominant alternative (smaller–sooner or larger–later vs. smaller–later) and some did not (smaller–sooner vs. larger–later). Across phases, only the delay to the smaller–sooner reinforcer varied. Distance effects were expected to be expressed as longer latencies as choice between smaller–sooner and larger–later reinforcers approached indifference. Despite the sensitivity of choice to differences in amount and delay, no distance effect was observed. Alternative explanations for the failure to find a distance effect in pigeon choice, including the Sequential Choice Model (SCM), are discussed.     

Perceptions of the Targets and Sources of COVID-19 Threat are Structured by Group Memberships and Responses are Influenced by Identification with Humankind

The purpose of this study was to investigate which social groups are perceived as a threat target and which are perceived as a threat source during the COVID-19 outbreak. In a German sample (N = 1454) we examined perceptions of social groups ranging from those that are psychologically close and smaller (family, friends, neighbors) to those that are more distal and larger (people living in Germany, humankind). We hypothesized that psychologically closer groups would be perceived as less affected by COVID-19 as well as less threatening than more psychologically distal groups. Based on social identity theorizing, we also hypothesized that stronger identification with humankind would change these patterns. Furthermore, we explored how these threat perceptions relate to adherence to COVID-19 health guidelines. In line with our hypotheses, latent random-slope modelling revealed that psychologically distal and larger groups were perceived as more affected by COVID-19 and as more threatening than psychologically closer and smaller groups. Including identification with humankind as a predictor into the threat target model resulted in a steeper increase in threat target perception patterns, whereas identification with humankind did not predict differences in threat source perceptions. Additionally, an increase in threat source perceptions across social groups was associated with more adherence to health guidelines, whereas an increase in threat target perceptions was not. We fully replicated these findings in a subgroup from the original sample (N = 989) four weeks later. We argue that societal recovery from this and other crises will be supported by an inclusive approach informed by a sense of our common identity as human beings.     

道德判断的外语效应：心理距离的中介与外语熟练度的调节作用

结合建构水平理论,基于多项式加工树构建算法,通过3个实验验证道德外语效应,并尝试探究道德外语效应的可能机制及其边界。实验1的结果表明中文为母语、英文为外语的个体的道德判断受语言的影响。与母语条件相比,外语条件下个体的道义论道德判断更少。实验2的结果进一步表明心理距离可以完全中介语言对道德判断的影响。实验3发现外语熟练度可以调节语言对心理距离的影响。研究结果再次验证了道德外语效应,并表明心理距离的中介作用和外语熟练度的调节作用,拓展了道德外语效应发生机制的可能解释。