Towards a new approach to detect sleepiness: Validation of the objective sleepiness scale under simulated driving conditions

The Objective Sleepiness Scale (OSS) was developed to detect and quantify sleepiness on the basis of two direct and reliable sleepiness indicators: EEG and EOG. The present study aims to test whether the OSS can be used to detect sleepiness episodes that impair performance on driving and vigilance tasks accurately and with a good time synchronization. Forty-three healthy volunteers performed monotonous driving sessions on a simulator and the psychomotor vigilance task (PVT) in a normal sleep condition and after partial sleep deprivation. OSS reliability and time synchronization for sleepiness detection were tested on driving (standard deviation of vehicle lateral position and off-road duration) and PVT (reaction time and lapses). Inter-rater reliability of the scale was evaluated by two blinded scorers. Results show that the OSS score indicates higher sleepiness in sleep deprivation conditions (p < 0.001) and with time-on-task. Differences of performance between OSS score calculated with multiple pairwise comparisons, indicate OSS score increase when driving performance (SDLP and off-road duration) decreases (p < 0.001 for comparisons between OSS stages 0 vs 2, 0 vs 3, 1 vs 2 and p < 0.05 for 1 vs 3). Reaction time during PVT is also related to the OSS score (p < 0.05 for OSS values from 0 to 2, 0 to 3, 1 to 2 and 1 to 3). There is no proportional relation between OSS score and performance impairment, but a threshold effect between levels 1 and 2 of the scale is observed. Positive outcomes are also obtained for time synchronization of the OSS assessed on driving performance (p < 0.001 for both SDLP and off-road duration). Finally, inter-rater agreement is found to be considerable. The results allow us to consider using the Objective Sleepiness Scale as a tool for research on sleepiness.     

工作记忆负荷对反馈加工过程的影响:来自脑电研究的证据

个体对行为后反馈结果的加工在学习和环境适应方面有重要意义,工作记忆负荷(working memory load,WM load)如何影响反馈加工过程尚不清楚。采用双任务范式,设置基线、低WM load、高WM load三种条件,结合ERP技术对这一问题进行探究。发现RewP (reward positivity,奖赏正波)对效价敏感,而不受WM load条件影响;Theta震荡的正、负反馈差异波在高WMload条件下比在低WM load条件下小。结果支持等级强化学习-前扣带回理论(HRL-ACC, hierarchical reinforcement learning theory of anterior cingulate cortex)对于RewP和theta震荡的观点:RewP反映了反馈效价评估功能, theta震荡反映了认知控制功能,并且WM load选择性影响了ACC的认知控制功能而不是反馈效价评估功能。     

认知诊断缺失数据处理方法的比较：零替换、多重插补与极大似然估计法

数据缺失在测验中经常发生, 认知诊断评估也不例外, 数据缺失会导致诊断结果的偏差。首先, 通过模拟研究在多种实验条件下比较了常用的缺失数据处理方法。结果表明：(1)缺失数据导致估计精确性下降, 随着人数与题目数量减少、缺失率增大、题目质量降低, 所有方法的PCCR均下降, Bias绝对值和RMSE均上升。(2)估计题目参数时, EM法表现最好, 其次是MI, FIML和ZR法表现不稳定。(3)估计被试知识状态时, EM和FIML表现最好, MI和ZR表现不稳定。其次, 在PISA2015实证数据中进一步探索了不同方法的表现。综合模拟和实证研究结果, 推荐选用EM或FIML法进行缺失数据处理。     

Physiological indicators of driver workload during car-following scenarios and takeovers in highly automated driving

This driving simulator study, conducted as a part of Horizon2020-funded L3Pilot project, investigated how different car-following situations affected driver workload, within the context of vehicle automation. Electrocardiogram (ECG) and electrodermal activity (EDA)-based physiological metrics were used as objective indicators of workload, along with self-reported workload ratings. A total of 32 drivers were divided into two equal groups, based on whether they engaged in a non-driving related task (NDRT) during automation (SAE Level 3) or monitored the drive (SAE Level 2). Drivers in both groups were exposed to two counterbalanced experimental drives, lasting ∼ 18 min each, of Short (0.5 s) and Long (1.5 s) Time Headway conditions during automated car-following (ACF), which was followed by a takeover that happened with or without a lead vehicle. Results showed that driver workload due to the NDRT was significantly higher than both monitoring the drive during ACF and manual car-following (MCF). Furthermore, the results indicated that a lead vehicle maintain a shorter THW can significantly increase driver workload during takeover scenarios, potentially affecting driver safety. This warrants further research into understanding safe time headway thresholds to be maintained by automated vehicles, without placing additional cognitive or attentional demands on the driver. Our results indicated that ECG and EDA signals are sensitive to variations in workload, which warrants further investigation on the value of combining these two signals to assess driver workload in real-time, to help future driver monitoring systems respond appropriately to the limitations of the driver, and predict their performance in the driving task, if and when they have to resume manual control of the vehicle after a period of automated driving.     

计算机化分类测验终止规则的类别、特点及应用

计算机化分类测验(Computerized Classification Testing, CCT)能够高效地对被试进行分类, 已广泛应用于合格性测验及临床心理学中。作为CCT的重要组成部分, 终止规则决定测验何时停止以及将被试最终划分到何种类别, 因此直接影响测验效率及分类准确率。已有的三大类终止规则(似然比规则、贝叶斯决策理论规则及置信区间规则)的核心思想分别为构造假设检验、设计损失函数和比较置信区间相对位置。同时, 在不同测验情境下, CCT的终止规则发展出不同的具体形式。未来研究可以继续开发贝叶斯规则、考虑多维多类别情境以及结合作答时间和机器学习算法。针对测验实际需求, 三类终止规则在合格性测验上均有应用潜力, 而临床问卷则倾向应用贝叶斯规则。     

Affective atmospheres of weapons technologies: The case of battle drones,combat fighters and bodies in contemporary German geopolitics

Using the example of the defense and security sector at the Innovation and Leadership in Aerospace aviation fair in Berlin, this paper interrogates how the presentation of weapons technologies at German security and aviation fairs produces a/effects that influence the body and serve to legitimize political decisions. It examines to what extent the body becomes the site of geopolitical negotiation via affective atmospheres and how different scales interact within this process. First, I argue that affective connections between weapons technologies and spectators are essential for legitimizing warfare technologies. Second, I argue that affects of weapons technologies are subject to ambivalence and ambiguity, and that they are to be understood as entangled with other affects in the same body. Third, I argue that affects become effective across material and spatial scales. Drawing on geographic work on affective atmospheres, debates in intimate geopolitics and feminist science and technology studies, the paper contributes to critical geopolitics by unpacking the role of affective dimensions in naturalizing the development and acquisition of weapons technologies. In doing so, it also contributes to debates on the methodological operationalization of theories of affect and to emotional geographies of (in)security.     

Between place and territory: Young people's emotional geographies of security and insecurity in Brussels' deprived areas

While much of literature on place attachment describes it as an affective bond between a (young) person and place, with positive psychosocial consequences such as identification, rootedness and belonging, some authors are cautious and stress that an enhanced attachment to place, termed “territoriality”, may have negative consequences such as hostility towards outsiders and a sense of non-belonging elsewhere. In this paper, I ask how we should understand this difference and how the analysis of young people's emotional geographies of (in)security can bring light to this question. The paper finds that emotional geographies of (in)security are instrumental in understanding how a “positive” attachment to place may lead to a “negative” attachment to territory, how some young people emotionally attach to places and some are inclined to claim these places against outsiders (and also at the expense of other members of the community). This explicit appropriation of public spaces in the home neighbourhood is co-constituted by feeling secure inside and insecure outside the area. Territoriality may be a response to or an expression of ontological insecurity and of the inner unease that prompts them to strange avoidance and contorted strategies for manipulating spaces and setting boundaries designed to secure the self.     

From Copenhagen to the consulting room: Pauli and Jung in Copenhagen

In this paper the city of Copenhagen is used as a starting point to highlight some critical historical events, both concerning the exchange of ideas between the physicist Wolfgang Pauli and C.G. Jung and the history of psychotherapy in Scandinavia. Pauli's years in Copenhagen under the influence of Niels Bohr and his philosophy prepared him mentally to receiveC.G. Jung's ideas. The paper also recounts the one occasion that Jung was in Scandinavia, attending the 9th conference of the General Medical Society for Psychotherapy in Copenhagen, just before going to New York in 1937 to give his final seminars on Pauli's dreams. The reason for focusing on these particular events is that they also constitute part of the history of the reception of psychodynamic psychology in Sweden and Scandinavia.     

Indigenizing CBPR: Evaluation of a Community-Based and Participatory Research Process Implementation of the Elluam Tungiinun (Towards Wellness) Program in Alaska

The process that community based participatory research (CBPR) implementation takes in indigenous community contexts has serious implications for health intervention outcomes and sustainability. An evaluation of the Elluam Tungiinun (Towards Wellness) Project aimed to explore the experience of a Yup'ik Alaska Native community engaged within a CBPR process and describe the effects of CBPR process implementation from an indigenous community member perspective. CBPR is acknowledged as an effective strategy for engaging American Indian and Alaska Native communities in research process, but we still know very little about the experience from a local, community member perspective. What are the perceived outcomes of participation in CBPR from a local, community member perspective? Qualitative methods were used to elicit community member perspectives of participation in a CBPR process engaged with one Yup'ik community in southwest Alaska. Results focus on community member perceptions of CBPR implementation, involvement in the process and partnership, ownership of the project with outcomes observed and perceived at the community, family and individual levels, and challenges. A discussion of findings demonstrates how ownership of the intervention arose from a translational and indigenizing process initiated by the community that was supported and enhanced through the implementation of CBPR. Community member perspectives of their participation in the research reveal important process points that stand to contribute meaningfully to implementation science for interventions developed by and for indigenous and other minority and culturally diverse peoples.