Is the street-crossing behavior with a head-mounted display different from that behavior in a CAVE? A study among young adults and children

The use of virtual reality (VR) has become increasingly popular in the field of traffic psychology, where realistic traffic situations can be simulated and pedestrians‘ actual crossing behavior can be studied. There are two main kinds of pedestrian simulators: one uses a technology based on rear-projection screens (Cave Automatic Virtual Environment, or CAVE); the other uses a head-mounted display (HMD). Despite their extensive use, it is yet to determine whether they are equally suitable for studying street crossing. The present study was aimed at comparing street-crossing behavior and subjective evaluations in an HMD-based (HTC vive pro) pedestrian simulator and a CAVE-like pedestrian simulator, among young adults and 12-year-old children. Thirty young adults and twenty-six children performed 36 street-crossing trials (combining different speeds, traffic conditions, and gap sizes) on each of the two simulators. The results indicated that, compared to the CAVE-condition participants, HMD-condition participants accepted more crossing trials (hence, shorter gaps), initiated their crossings sooner, crossed at a slower speed, had shorter safety margins, and caused more collisions. The main difference between the two devices was in crossing initiation, which occurred markedly earlier (1.72 s) with the HMD than in the CAVE: the perception–action coupling was less finely tuned in the CAVE, probably because visual information in front of the pedestrian was missing due the absence of ground projection and 3D rendering. A significant effect of vehicle-approach speed was observed for both devices, with more unsafe behaviors at 60 km/h than at 40 km/h. Children displayed riskier crossing behavior than young adults did, with more accepted crossings, slower crossing speeds, shorter safety margins, and higher collision rates, especially in the HMD. Compared to the CAVE, the HMD received higher ratings for level of presence and a preference for VR, but also higher simulator-sickness scores. No adverse effects of exposure to virtual reality was found on stereoacuity or postural balance. The suitability of using CAVE and HMD simulators is discussed, especially for studying child pedestrians.     

二胎进行时:头胎儿童在向同胞关系过渡时的生理和心理变化及其影响因素

近年来,有关头胎儿童在面对母亲生第二胎时出现各种问题的新闻报道屡见不鲜。那么,是不是儿童在面对母亲生二胎时,都会出现如此消极的反应?会不会出现积极的反应呢?如果存在个体差异的话,那么面对第二胎的降临,哪些儿童更容易出现消极或者积极的变化?另外,是否有保护因素让头胎儿童更好地应对弟妹出生?是否有风险因素导致头胎儿童出现消极的结果?本项目拟开展3项子研究来回答上述这些问题。研究1分析在第二胎降临前后,头胎儿童的生理和心理变化轨迹;研究2分析调节头胎儿童生理和心理变化的个人因素(例如,气质和共情);研究3分析调节头胎儿童生理和心理变化的家庭层面的因素(例如,亲子关系与父母婚姻)。所获结果将为当前以及未来二孩家庭心理健康教育和咨询提供实证依据,具有重要的应用价值。     

Effects of different non-driving-related-task display modes on drivers’ eye-movement patterns during take-over in an automated vehicle

Highly automated vehicles relieve drivers from driving tasks, allowing them to engage in non-driving-related-tasks (NDRTs). However, drivers are required to take over control in certain circumstances due to the limitations of highly automated vehicles. This study focused on drivers’ eye-movement patterns during take-overs when an NDRT (watching videos) was presented via a head-up-display (HUD) and a mobile device display (MDD), compared to no NDRT as the baseline. The experiment was conducted in a high-fidelity driving simulator with real-world driving videos scenarios. Forty-six participants took part in the experiment by completing three drives in three counterbalanced conditions (HUD, MDD and baseline). A take-over-request was issued towards the end of automated driving requesting drivers to stop the NDRT and take over control. Eye-movement data including pupil diameter, blinks, glance duration and number of AOI (Area of Interest) were collected and analysed. The results show that during automated driving, drivers were more engaged in the MDD NDRT with smaller pupil diameter and shorter glance duration on the front scenario compared to the HUD and baseline modes. The number of AOI was reduced during automated driving in both MDD and HUD modes. The take-over-request redirected drivers’ visual attention back to the driving task from NDRT by increasing drivers’ pupil diameter, glance duration and number of AOI. However, the effect of MDD NDRT on pupil diameter and glance duration continued even after the take-over-request when the NDRT was terminated. The study demonstrated HUD is a better display to help maintain drivers’ attention on the road.     

Emotional Reactions to Health Status Changes and Emotional Well-Being Among HIV-Positive Persons with Limited Reading Literacy

People living with HIV-AIDS experience emotional distress in response to negative changes in their health status. The current study hypothesized that individuals with poorer health literacy skills would evidence greater emotional distress in response to negative changes in health status compared to persons with higher health literacy skills. HIV positive persons (N = 294) completed anonymous surveys that included measures of depression and social support and a subset of 98 participants completed two experimental vignettes depicting a person receiving test results showing an increase in HIV viral load (negative health changes) followed by a vignette suggesting decreased viral load (improved health changes). Responses to affective reactions and coping strategies indicated that persons with lower health literacy skills more strongly endorsed negative affective states and maladaptive coping strategies compared to persons with higher health literacy skills. In addition, lower health literacy was associated with greater symptoms of affective depression and poorer social support, whereas higher literacy was associated with greater negativistic thinking. Findings suggest the need for patient education and counseling regarding changes in health status among people living with HIV-AIDS, particularly persons with limited health literacy skills.     

规则多边图形的离散度、图基边数及显示条件的交互作用研究

用实验方法研究规则多边图形的离散度、图形基边数、显示条件及三因素的交互作用对图形信号认知绩效的影响。实验的自变量有：（１）图形的离散度参数;（２）图形的基边数;（３）图形的显示条件。因变量是各图形信号的平均反应时。实验的刺激材料是２５个不同离散度、不同基边数的规则多边图形。刺激材料的呈现与被试的反应记录都由计算机控制。结果表明：（１）离散度对图形信号认知绩效的影响十分显著,离散度适中及偏小的图形信号认知绩效较高;（２）图形基边数对认知绩效的影响十分显著,认知绩效反比于图形的基边数;（３）显示条件对认知绩效的影响不显著;（４）离散度与基边数的交互作用影响显著,离散度偏大的０．６,０．７图形与离散度偏小及适中的０．３,０．４,０．５图形的认知绩效在基边数大于８后出现明显的分离趋势。     

Are cognitive sex differences disappearing? Evidence from Spanish populations

Sex differences in cognitive abilities were determined using the norms from two standardizations of the Differential Aptitude Test (DAT) and the Primary Mental Abilities (PMA) conducted between 1979 and 1995 in Spain. The standardized sex differences (ds) were computed separately for the DAT and the PMA subscales. Males scored higher in the DAT subscales Verbal Reasoning, Numerical Ability, Spatial Relations and Mechanical Reasoning, as well as in the PMA subscales Numerical Ability and Mental Rotation. Females scored higher in Inductive Reasoning (PMA-R) in the 1979 and 1995 standardizations. Taken together, these data do not support the hypothesis that cognitive sex differences are disappearing: there are still some differences favoring females and still some differences favoring males.     

Behavioral assessment of avoidance in agoraphobia

Behavioral avoidance testing is a substantial addition to self-report questionnaires in the assessment of agoraphobia. However, the tests currently in use have drawbacks and limitations. A multitask behavioral avoidance test (M-BAT) is presented, designed to meet some of these problems. The test was administered to a group of 58 patients and proved to be reliable in terms of internal consistency. Concordance with self-report measures of agoraphobia indicated a high concurrent validity. In comparison with self-report questionnaires, the tests produced a slightly more conservative picture of gains achieved in treatment. Finally, the data revealed that the multitask test was more concordant with other measures of agoraphobia than a single-task test would have been.     

Cumulative impact neglect in processing sequential changes

We demonstrate that decision contexts that involve sequential numerical changes over time can lead to suboptimal consumer choices in both incentivized and hypothetical studies. This is because, for such changes, an earlier outcome has a cumulative effect on the final total, which consumers tend to ignore. We document the prevalence of consumers' tendency to neglect this cumulative impact when processing sequential rent increases and price discounts as consumers focus on the naïve totals and trends formed by the consecutive price changes and choose economically inferior options. We propose a nudge that helps alert consumers about the cumulative effects and decrease their tendency to fall prey to this bias. We discuss the theoretical contributions as well as the implications for consumers, managers, and policymakers.     

Vis‐à‐vis the Couch: Where is Psychoanalysis?

The author discusses ways in which the couch or chair (lying down versus sitting up) may be used to maintain safety and defend against perceived dangers in the analytic process. Several dialectics are relevant as they intersect with that of danger and safety, including engagement/privacy, interiority/exteriority and subject/object. The author discusses these dialectics in terms of the ways in which the analyst is used at different points in time, i.e. as an objectifi ed other, a subjective object or part-object, or as a subject with an internal world. The therapeutic action associated with sitting up (versus lying down on the couch) has been undertheorized, despite the fact that many, if not most, analysands sit up for some portion of their analysis. Through the use of a heuristic visual-spatial metaphor as represented by the use of the couch or chair, the author discusses the signifi cance of lying down and sitting up for therapeutic action.