Heiko Hecht

Johannes Gutenberg University Mainz | JGU · Institute of Psychology

[This corrects the article DOI: 10.1371/journal.pone.0288206.].

In two augmented-reality experiments, we transferred the paradigm of interpersonal distance regulation to human–drone interaction. In the first experiment, we used a simple spherical drone model and explored how both hovering height and approach angle affect the preferred distance. Drone height above the ground had a strong effect. The preferred di...

BACKGROUND Working in an operating room (OR) is physically and mentally challenging: the operation itself demands the surgeon’s full attention, while owing to time and cost efficiency constraints daily planning and emergency care keep interfering on different levels. Thus, multitasking becomes an integral surgical competence. OBJECTIVE This study...

Background Working in an operating room (OR) is physically and mentally challenging: the operation itself demands the surgeon's full attention, while time and cost efficiency constraints, daily planning, and emergency care interfere with the procedure. Thus, multitasking becomes an integral surgical competence. This study aims to examine the effect...

Advanced visual display technologies typically supplement the out-of-window view with separate displays (e.g., analog speedometer or artificial horizon) or with overlays (e.g., projected speedometer or map). Studies on head-up displays suggest that altering the out-of-window view itself is superior to supplemental displays, as sensor-based informat...

For the safety of road traffic, it is crucial to accurately estimate the time it will take for a moving object to reach a specific location (time-to-contact estimation, TTC). Observers make more or less accurate TTC estimates of objects of average size that are moving at constant speeds. However, they make perceptual errors when judging objects whi...

Background Working in an operating room (OR) is physically and mentally challenging: the operation itself demands the surgeon’s full attention, while owing to time and cost efficiency constraints daily planning and emergency care keep interfering on different levels. Thus, multitasking becomes an integral surgical competence. This study aims to exa...

When judging the time-to-collision (TTC) of visually presented accelerating vehicles, untrained observers do not adequately account for acceleration (second-order information). Instead, their estimations only rely on vehicle distance and velocity (first-order information). As a result, they systemically overestimate the TTC for accelerating objects...

Positively evaluated stimuli facilitate approach and negatively evaluated stimuli prompt avoidance responses, as typically measured by reaction time differences when moving a joystick toward the own body or away from it. In this study, we explore whether a whole-body response (forward and backward leaning can serve as a better indicator of approach...

Numerous studies indicate that listening to music and reading are processes that interact in multiple ways. However, these interactions have rarely been explored with regard to the role of emotional mood. In this study, we first conducted two pilot experiments to assess the conveyed emotional mood of four classical music pieces and that of four nar...

Research on psychopathy has so far been largely limited to the investigation of high-level processes, such as emotion perception and regulation. In the present work, we investigate whether psychopathy has an effect on the estimation of fundamental physical parameters, which are computed in the brain during early stages of sensory processing. We emp...

The COVID-19 pandemic has altered the way we interact with each other: mandatory mask-wearing obscures facial information that is crucial for emotion recognition. Whereas the influence of wearing a mask on emotion recognition has been repeatedly investigated, little is known about the impact on interaction effects among emotional signals and other...

Visually induced motion sickness (VIMS) is a well-known side effect of virtual reality (VR) immersion, with symptoms including nausea, disorientation, and oculomotor discomfort. Previous studies have shown that pleasant music, odor, and taste can mitigate VIMS symptomatology, but the mechanism by which this occurs remains unclear. We predicted that...

The aim was to investigate whether severe symptoms of visually induced motion sickness (VIMS) can occur in augmented reality (AR) optical see-through applications. VIMS has been extensively studied in virtual reality (VR), whereas it has received little attention in the context of AR technology, in which the real world is enhanced by virtual object...

The quality of a concert hall primarily depends on its acoustics. But does visual input also have an impact on musical enjoyment? Does the color of ambient lighting modulate the perceived music quality? And are certain colors perceived to fit better than others with a given music piece? To address these questions, we performed three within-subjects...

As the cerebellum is involved in vestibular and time-keeping processes, we asked if the latter are related. We conducted three experiments to investigate the effects of vestibular stimulation on temporal processing of supra-second durations. In Experiment 1, subjects had to perform temporal productions of 10- and 15-s intervals either standing on b...

Filmmakers have established editing rules that aim to create cinematic continuity across filmic cuts, thereby avoiding viewers’ confusion despite the abrupt changes in perception. In our present project, we investigated the impact of 3D films, as opposed to 2D films, on the salience of filmic cuts. We employed a cut detection task and focused on wi...

Selecting a safe gap before merging into the traffic is a crucial driving skill that relies on images provided by rear-view mirrors or, recently, camera-monitor systems. When using these visual aids, some drivers select dangerously small gaps to cut in front of faster vehicles. They may do so because they base their decision either on information a...

Filmmakers have established editing rules that aim to create cinematic continuity across filmic cuts, thereby avoiding viewers’ confusion despite the abrupt changes in perception. In our present project, we investigated the impact of 3D films, as opposed to 2D films, on the salience of filmic cuts. We employed a cut detection task and focused on wi...

Visually induced motion sickness (VIMS) is a common side-effect of exposure to virtual reality (VR). Its unpleasant symptoms may limit the acceptance of VR technologies for training or clinical purposes. Mechanical stimulation of the mastoid and diverting attention to pleasant stimuli-like odors or music have been found to ameliorate VIMS. Chewing...

Manufacturers are increasingly considering the replacement of side-mounted rear-view mirrors with camera-monitor systems (CMS). These systems offer advantages that can improve rearward vision and safety, such as image enhancement. However, these systems must also be accepted and valuated by users. We examined acceptance of CMS, the willingness to c...

The replacement of rear-view mirrors with camera-monitor systems introduces new opportunities for design, such as altering the image quality and the rearward field-of-view. We investigated how the image quality and field-of-view might affect distance and time-to-contact estimation of other vehicles. 86 subjects estimated either their egocentric dis...

Often, we have to rely on limited information when judging time-to-contact (TTC), as for example, when driving in foul weather, or in situations where we would need reading glasses but do not have them handy. However, most existing studies on the ability to judge TTC have worked with optimal visual stimuli. In a prediction motion task, we explored...

In the early 19th century, William H. Wollaston impressed the Royal Society of London with engravings of portraits. He manipulated facial features, such as the nose, and thereby dramatically changed the perceived gaze direction, although the eye region with iris and eye socket had remained unaltered. This Wollaston illusion can be thought of as hea...

We conducted two experiments to investigate how observers integrate postural and visual eye-height information when estimating the layout of interior space. In Experiment 1, we varied postural and visual eye-height information independently of each other in a virtual-reality setup. Observers estimated the width, depth, and height of simulated rooms...

Objective: This experiment provides a first-of-its-kind driving-simulator study to investigate the feasibility of camera-monitor systems (CMS) with displaced side-mounted cameras in sedans. Background: Among the increasing number of studies investigating the replacement of side-mounted rearview mirrors with CMS, the placement of side-mounted cam...

Truck platoon driving technology uses vehicle-to-vehicle communication to allow one truck to follow another in an automated fashion. The first vehicle is operated manually, the second vehicle is driven semi-automatically once platoon-mode is activated. In this mode, the driver merely has to monitor traffic. Semi-automated driving in passenger cars...

Visually induced motion sickness is an unpleasant but common side-effect of many simulations and VR-applications. We investigated whether an earth-fixed reference frame provided in the simulation is able to reduce motion sickness. To do so, we created a moving starfield that did not contain any indicators of the spatial orientation of the observer....

Platooning technology aims at achieving fuel savings by reducing the distance between two or more electronically coupled vehicles. This technology has recently been tested on public highways with heavy trucks in Germany and California. The objective of this study is to assess the level of acceptance among other road users as well as influencing fac...

Background: Mandatory rules for social distancing to curb the SARS-CoV-2 pandemic require individuals to maintain a critical interpersonal distance above 1.5 m. However, this contradicts our natural preference, which is closer to 1 m for non-intimate encounters, for example, when asking a stranger for directions. Objective: This review addresses...

How does sexual attraction alter social interaction behavior? We examined the influence of sexual orientation on locomotor approach-avoidance behavior and interpersonal distance. We immersed androphilic and gynophilic male subjects into a virtual environment and presented various male and female virtual persons. In the first experiment, subjects to...

In the early 19th century, William H. Wollaston impressed the Royal Society of London with engravings of portraits. He manipulated facial features, such as the nose, and thereby dramatically changed the perceived gaze direction, although the eye region with iris and eye socket had remained unaltered. This Wollaston illusion has been replicated nume...

Autonomous driving is receiving increasing attention in the automotive industry as well as in public transport. However, it is still unclear whether users are willing to use automated public transportation at all. In order to answer this and other questions, the transport company of the city of Mainz, Germany, tested the autonomous minibus EMMA (El...

Objective This study investigates the effects of different positions of side-mounted rear-view cameras on distance estimation of drivers. Background Camera-monitor systems bring advantages as compared to conventional rear-view mirrors, such as improved aerodynamics and enlarged field-of-view. Applied research has mainly focused on the comparison b...

Truck platoon driving is a current branch of automated driving, which has the potential to radically change the work routine of professional drivers. In a platoon system, one truck (semi-)automatically follows a lead truck with a reduced distance, which produces significant savings in fuel and enables better traffic flow. In a current application o...

Objective: Eating disorders have a considerable influence on social contacts. The avoidance towards the own body may result in the avoidance of others. Previous research has found a preference for larger interaction distances in individuals with eating disorders (ED) as compared to control participants (CG). We aimed to replicate these findings an...

In this study, we examined the impact of psychopathy on approach-avoidance reactions and interpersonal distance (IPD) in response to social cues. We selected a student sample and measured psychopathy via self-report. Participants were immersed in a virtual environment in which a virtual person displayed either angry or happy facial expressions. In...

Sound by itself can be a reliable source of information about an object’s size. For instance, we are able to estimate the size of objects merely on the basis of the sound they make when falling on the floor. Moreover, loudness and pitch are crossmodally linked to size. We investigated if sound has an effect on size estimation even in the presence o...

Significance: Individuals with left hemianopic field loss (HFL), especially with neglect history, may have greater difficulties than individuals with right HFL in judging the direction of another person's gaze. Purpose: Individuals with HFL often show a spatial bias in laboratory-based perceptual tasks. We investigated whether such biases also m...

The quality of a concert hall primarily depends on its acoustics. But does visual input have an impact on the musical enjoyment as well? In the present study, we aimed at answering two questions: First, does the color of ambient light modulate the perceived intensity of certain characteristics of the music we listen to? Referring to multisensory pe...

The texture of an object's surface influences its perceived spatial extent. For example, Hermann von Helmholtz reported that a square patch with black and white stripes appears elongated perpendicular to the stripes' orientation. This time-honoured finding stands in contrast with more recent recommendations by interior-design experts who suggest th...

When people are required to indicate the vanishing location of a moving object, systematic biases forward, in the direction of motion, and downward, in the direction of gravity, are usually found. Both these displacements, called representational momentum and representational gravity, respectively, are thought to reflect anticipatory internal mecha...

Violations of personal space are associated with discomfort. However, the exact function linking the magnitude of discomfort to interpersonal distance has not yet been specified. In this study, we explore whether interpersonal distance and discomfort are isotropic with respect to uncomfortably far or close distances. We also extend previous finding...

Objective: The study explores associations of visually induced motion sickness (VIMS) with emergency braking reaction times (RTs) in driving simulator studies. It examines the effects over the progression of multiple simulated drives. Background: Driving simulator usage has many advantages for RT studies; however, if it induces VIMS, the observed...

Traffic research is increasingly investigating the effects of camera-monitor systems (CMS) as a replacement for conventional side-mounted rear-view mirrors on passenger vehicles. However, research so far has solely compared mirrors to cameras mounted in a position similar to that of the mirror. In a first study, we investigated how camera displacem...

The notion of a personal space surrounding one's ego-center is time-honored. However, few attempts have been made to measure the shape of this space. With increasing use of virtual environments, the question has arisen if real-world aspects, such as gender-effects or the shape of personal space, translate to virtual setups. We conducted two experim...

Lockout is a system-initiated distraction mitigation strategy that renders certain features of in-vehicle information systems (IVISs) non operable while the vehicle is in motion. The aim of this driving simulator study was to examine the influence of lockouts on driving performance and user acceptance. Overall, 52 participants performed six tasks w...

Background: Visually induced motion sickness (VIMS) is commonly experienced when visual motion information is in conflict with motion information provided by the vestibular system and/or tactile and kinesthetic senses. According to some studies, women experience higher levels of VIMS than men, whereas other studies do not find this to be the case....

Simulatorkrankheit ähnelt in ihrer Symptomatik derjenigen einer Kinetose. Im Einzelfall können u.a. Erbrechen und starker Schwindel auftreten. Manche Symptome können u.U. einige Stunden lang anhalten. Tagesschläfrigkeit kann wie verschiedene Erkrankungen und höheres Alter die Entstehung Simulatorkrankheit begünstigen. Mit dem üblicherweise verwende...

Vehicle manufacturers are increasingly considering the implementation of camera-monitor systems (CMS) as replacement for conventional side-mounted rear-view mirrors on passenger vehicles. Advantages would be improved visibility, aerodynamics and reduced emissions. Moreover, CMS provides designers with the delicate and potentially detrimental altern...

A growing body of research investigates crossmodal correspondences in human perception. Environmental factors, such as haptics or noise, have been shown to influence gustatory experience (see Knöferle & Spence, 2012, for a review). Adrian North (2012) investigated whether music would lead to the distortion of the gustatory perception of red and whi...

In East Asian cultures, people maintain larger interpersonal distances than in European or American cultures. We investigated whether a preference for averted gaze might be responsible for this difference. Typically, when measuring interpersonal distance, participants are asked to maintain eye contact. This request might bias findings due to cultur...

Previous studies have reported that bright ceilings appear higher than dark ceilings, irrespective of the other colorimetric properties of the ceiling color (hue, saturation) and irrespective of the luminance of the remaining room surfaces (walls, floor). In the present study, we expand these findings to width and depth estimates. We presented ster...

Raw data of the width and depth estimates. Archive file containing the raw datasets (i.e., uncorrected and not aggregated across repetitions per condition) for the width estimates (widthEstimates.csv) and depth estimates (depthEstimates.csv). When the variable 'typoExperimenter' has the value 'true', this indicates that the experimenter noted an un...

High carbon dioxide (CO2) emissions in road transportation force vehicle manufacturers to increase driving efficiency A promising approach to do this is coasting (i e gliding with engine declutched), which can be combined with conventional stop start technologies to significantly reduce CO 2 emissions. But how can drivers be motivated to use coasti...

Psychopathic traits are often associated with interpersonal and affective deficits. This study examined the impact of psychopathy on judgments of comfortable egocentric interpersonal distance (Experiment 1) and exocentric interpersonal distance (Experiment 2). We selected a student sample and measured psychopathy via self-report. To study spatial b...

Objective: We investigate effects of the hue, saturation, and luminance of ceiling color on the perceived height of interior spaces. Background: Previous studies have reported that the perceived height of an interior space is influenced by the luminance of the ceiling, but not by the luminance contrast between ceiling and walls: brighter ceiling...

Previous research has shown that auditory cues can influence the flavor of food and drink. For instance, wine tastes better when preferred music is played. We have investigated whether a music background can modify judgments of the specific flavor pattern of a beverage, as opposed to mere preference. This was indeed the case. We explored the nature...

Our ability to estimate distances, be it verbally or by locomotion, is exquisite at close range (action space). At distances above 100 m (vista space), verbal estimates continue to be quite accurate, whereas locomotor estimates have been found to be grossly underestimated. Until now, however, the latter have been performed on a treadmill, which mig...

Hills often appear to be steeper than they are. The unusual magnitude of this error has prompted extensive experimentation. The judgment mode, such as verbal vs. action-based measures, the state of the observer - whether exhausted or well rested - all can influence perceived geographical slant. We hold that slant perception is inherently shaky as s...

Zielsetzung: PKW-Fahrsimulatoren werden u.a. in der Rehabilitation und zum Training eingesetzt. Bei etlichen Fahrern tritt die Simulatorkrankheit (VIMS) auf, die nicht zwangsläufig zum Abbruch der Fahrt führt. Die Wirkungen von VIMS auf die Bremsreaktionszeit wurden bisher nicht systematisch untersucht. Dieser Fragestellung sind wir nachgegangen. M...

Recent evidence has shown that the mental representation of time is “embodied” – time is expressed via the hands, the eyes, and the whole body. These findings suggest the existence of a manually reflected mental time line running (in Western culture) horizontally from left (past) to right (future) and an ocularly reflected mental time line running...

Forensic series have become popular over the last two decades. They have raised the importance of forensic evidence in the eyes of the public (CSI effect). However, it has not been investigated to what extent criminals may learn about forensic evidence through these shows. We used multiple approaches to tackle this potential CSI-education effect. F...

The present study is a first attempt to experimentally test the impact of two specific social factors, namely social conformity pressure and a sense of being watched, on participants’ judgments of the artistic quality of aesthetic objects. We manipulated conformity pressure with a test form in which a photograph of each stimulus was presented toget...

The mere presence of a depiction of eyes can elicit a sense of being watched in the perceiver. To this date, the factors affecting the intensity of this sense of being watched, however, have not been investigated. In the present experiment, we tested the impact of two potentially relevant variables: arousal (manipulated using specific musical piece...

APA is celebrating 125 years this year and at the journal we are commemorating this milestone with a special issue. The inspiration came from our editorial team, who wished to acknowledge the links between game-changing articles that have influenced our research community in the past—we call them classics for short—and contemporary works. The main...

Folklore has it that ambient color has the power to relax or arouse the observer and enhance performance when executing cognitive tasks. We picked a number of commercially available colors that allegedly have the power to alter cognitive performance and the emotional state, and exposed subjects to them while solving a battery of cognitive tasks. Th...

Grunfeld, Price, Goadsby, and Gresty (1998) proposed a shared mechanism of motion sickness, migraine, and the menstrual cycle. Golding, Kadzere, and Gresty (2005) investigated the relationship between MS and the hormone levels, but did so only by dividing the menstrual cycle into four groups, disregarding individual cycle length. Matchock, Levine,...

Laughter is said to be contagious. Maybe this is why TV stations often choose to add so-called canned laughter to their shows. Questionable as this practice may be, observers seem to like it. If such a simple manipulation, assumingly by inducing positive emotion, can change our attitudes toward the film, does the opposite manipulation work as well?...

It is common to use counting strategies to produce time intervals accurately. Does counting improve the accuracy (deviation of produced duration from veridical duration) and precision (variability of produced duration) of time productions in the range of seconds to minutes? In a series of experiments, we compared chronometric counting to intuitive...

Poster for the 2017 ECVP

It is still unclear why psychopathic individuals might prefer shorter interpersonal distance (IPD). Therefore, we investigated whether psychopathy effects on IPD are modulated by facial expression and eogcentric vs. exocentric views.

One hundred years ago, in 1916, Hugo Münsterberg was the first psychologist to publish a book on movie psychology, entitled The Photoplay: A Psychological Study. We revisit this visionary text, which was an anticipation of the fi eld of cognitive movie psychology. We use the structure of his book to look into advances that have been made within the...

Objective Driving simulator usage is becoming more widespread, yet many users still experience substantial motion sickness-like symptoms induced by optical flow, called visually induced motion sickness (VIMS). The Fast Motion sickness Scale (FMS) allows for continuous on-line assessment of VIMS. Using mixed models for ordinal data, this study inves...

Film theories have long proposed that the vertical camera angle influences how the scene and the character in it are interpreted. An elevated camera (high-angle shot) should diminish the qualities of the actor, whereas a lowered camera (low-angle shot) should elevate the actor in perspective as well as in the viewer’s opinion. We were interested in...

This study investigated the role of vection (i.e., a visually induced sense of self-motion), optokinetic nystagmus (OKN), and inadvertent head movements in visually induced motion sickness (VIMS), evoked by yaw rotation of the visual surround. These three elements have all been proposed as contributing factors in VIMS, as they can be linked to diff...

Dataset containing all relevant individual data used for the analysis. A description of parameter names is provided on the second worksheet. (XLSX)

It is common to use counting strategies in order to accurately produce short time intervals. But does counting indeed improve the accuracy (deviation of mean produced duration from veridical duration) and precision (variability of produced duration) of time productions in the range of seconds to minutes? Cognitive models of time perception indicate...