Fluctuations in pedestrian dynamics routing choices.

Routing choices of walking pedestrians in geometrically complex environments are regulated by the interplay of a multitude of factors such as local crowding, (estimated) time to destination, and (perceived) comfort. As individual choices combine, macroscopic traffic flow patterns emerge. Understanding the physical mechanisms yielding macroscopic traffic distributions in environments with complex geometries is an outstanding scientific challenge, with implications in the design and management of crowded pedestrian facilities. In this work, we analyze, by means of extensive real-life pedestrian tracking data, unidirectional flow dynamics in an asymmetric setting, as a prototype for many common complex geometries. Our environment is composed of a main walkway and a slightly longer detour. Our measurements have been collected during a dedicated high-accuracy pedestrian tracking campaign held in Eindhoven (The Netherlands). We show that the dynamics can be quantitatively modeled by introducing a collective discomfort function, and that fluctuations on the behavior of single individuals are crucial to correctly recover the global statistical behavior. Notably, the observed traffic split substantially departs from an optimal, transport-wise, partition, as the global pedestrian throughput is not maximized.

Emotional Reactions to Cybersecurity Breach Situations: Scenario-Based Survey Study.

BACKGROUND: With the ever-expanding interconnectedness of the internet and especially with the recent development of the Internet of Things, people are increasingly at risk for cybersecurity breaches that can have far-reaching consequences for their personal and professional lives, with psychological and mental health ramifications. OBJECTIVE: We aimed to identify the dimensional structure of emotion processes triggered by one of the most emblematic scenarios of cybersecurity breach, the hacking of one's smart security camera, and explore which personality characteristics systematically relate to these emotion dimensions. METHODS: A total of 902 participants from the United Kingdom and the Netherlands reported their emotion processes triggered by a cybersecurity breach scenario. Moreover, they reported on their Big Five personality traits, as well as on key indicators for resilient, overcontrolling (internalizing problems), and undercontrolling (aggression) personality types. RESULTS: Principal component analyses revealed a clear 3-dimensional structure of emotion processes: emotional intensity, proactive versus fight/flight reactions, and affective versus cognitive/motivational reactions. Regression analyses revealed that more internalizing problems (ß=.33, P<.001), resilience (ß=.22, P<.001), and agreeableness (ß=.12, P<.001) and less emotional stability (ß=-.25, P<.001) have significant predictive value for higher emotional intensity. More internalizing problems (ß=.26, P<.001), aggression (ß=.25, P<.001), and extraversion (ß=.07, P=.01) and less resilience (ß=-.19, P<.001), agreeableness (ß=-.34, P<.001), consciousness (ß=-.19, P<.001), and openness (ß=-.22, P<.001) have significant predictive value for comparatively more fight/flight than proactive reactions. Less internalizing problems (ß=-.32, P<.001) and more emotional stability (ß=.14, P<.001) and aggression (ß=.13, P<.001) have significant predictive value for a comparatively higher salience for cognitive/motivational than affective reactions. CONCLUSIONS: To adequately describe the emotion processes triggered by a cybersecurity breach, two more dimensions are needed over and above the general negative affectivity dimension. This multidimensional structure is further supported by the differential relationships of the emotion dimensions with personality characteristics. The discovered emotion structure could be used for consistent predictions about who is at risk to develop long-term mental well-being issues due to a cybersecurity breach experience.

Illuminating for Safety: Investigating the Role of Lighting Appraisals on the Perception of Safety in the Urban Environment.

In two studies, we took a prospect-refuge based perspective to investigate how lighting and other physical attributes (i.e., prospect, concealment, and entrapment) affect people's judgments of the safety of urban streets during nighttime. Both studies complement existing research, which predominantly use factorial designs, with more ecologically valid correlational research using a large and representative sample of urban streets as stimulus materials. Results from Study 1 corroborate existing research demonstrating that differences in prospect, concealment, and entrapment predicted, to a large extent, variation in the perceived safety of urban streets-thus demonstrating the utility of such environmental information for making safety judgments in real-life settings. Results from a mediation analysis conducted in Study 2 showed that the relation between appraisals of lighting quality and safety judgments was completely accounted for by co-occurring variation in appraisals of prospect and entrapment. Implications for theory and methodology are discussed.

Atmosphere in an urban nightlife setting: A case study of the relationship between the socio-physical context and aggressive behavior.

Aggression is strongly influenced by the surrounding socio-physical context, and the development of aggressive behavior is best understood through a continuous cycle of ongoing person-environment interactions. Empirical studies, nevertheless, have been predominantly conducted in the laboratory, studying aggression as a short-lived phenomenon, emerging from and within an individual, and - with situational factors studied in isolation - devoid of its context. The present field study, conducted in an urban nightlife area, complements this research. A qualitative, multi-method approach was followed by thematic analysis to investigate ongoing behavioral patterns of the crowd vis-à-vis the changes in the context that co-occurred with the development of unwanted behaviors, including aggression. In our study, we identified atmosphere as a dynamic and mood-like, but extra-individual state of the socio-physical setting related to the development of aggression. Our results suggest that atmosphere affects the behavior of groups and individuals by emerging from and feeding into ongoing interactions between people and the environment. At the individual level, it appears to play its part as proximate determinant of behavior; at the crowd level it reflects the synergetic product of all those persons' states, behaviors and interactions. Implications for aggression theory and for applications aimed at curbing aggression are discussed.

Individual differences in the rubber-hand illusion: predicting self-reports of people's personal experiences.

Can we assess individual differences in the extent to which a person perceives the rubber-hand illusion on the basis of self-reported experiences? In this research, we develop such an instrument using Rasch-type models. In our conception, incorporating an object (e.g., a rubber hand) into one's body image requires various sensorimotor and cognitive processes. The extent to which people can meet these requirements thus determines how intensely people experience and, simultaneously, describe the illusion. As a consequence, individual differences in people's susceptibility to the rubber-hand illusion can be determined by inspecting reports of their personal experiences. The proposed model turned out to be functional in its capability to predict self-reports of people's experiences and to reliably assess individual differences in susceptibility to the illusion. Regarding validity, we found a small, but significant, correlation between individual susceptibility and proprioceptive drift. Additionally, we found that asynchrony, and tapping rather than stroking the fingers constrain the experience of the illusion.

The effect of similarities in skin texture and hand shape on perceived ownership of a fake limb.

In the rubber-hand illusion (RHI), people attribute an artificial object to their own body. In the present study, we investigate the extent to which RHI is affected by visual discrepancies between the artificial object and a human hand. We tested Armel and Ramachandran's (2003) hypothesis that people will experience a stronger RHI when the artificial object is a skin-like textured sheet instead of a tabletop. We did not find support for their hypothesis, but the strength of the RHI diminished when the texture of a hand-shaped object did not resemble the human skin (manipulated by putting a white glove over the cosmetic prosthesis). We provide an alternative explanation for this finding, based on a skill-based sensorimotor account of perceived body ownership. Such an explanation supports Armel and Ramachandran's more general claim that discrepancies in the nature of expected and felt touch diminish the RHI.