Obstacle Avoidance Behaviour during Locomotion: Strategy Changes as a Result of Visual Field Limitations

In order to walk through structured surroundings without colliding with any obstacles or parts of that environment, humans rely for the most part on the visual system. Therefore, impairment in the acquisition of visual information poses a threat to efficient and save locomotion through structured environments. One form of impairment is the...

Obstacle crossing with lower visual field restriction: Shifts in strategy

In this study, the authors investigated how restriction of the vertical viewing angle influences obstacle-crossing behavior. Twelve participants stepped over obstacles of different dimensions while wearing visual-field-restricting goggles. Using full-body motion capture, several kinematic measures were extracted and analyzed. Results indicate...

Human locomotion through a multiple obstacle environment: Strategy changes as a result of visual field limitation

This study investigated how human locomotion through an obstacle environment is influenced by visual field limitation. Participants were asked to walk at a comfortable pace to a target location while avoiding multiple vertical objects. During this task, they wore goggles restricting their visual field to small (S: 40° × 25°), medium (M: 80° × 60...

Locomotion through a complex environment with limited field-of-view

Restrictions of field-of-view are known to impair human performance for a range of different tasks. However, such effects on human locomotion through a complex environment are still not clear. Effects of both horizontal (30°, 75°, 112°, 120°, 140°, 160°, and 180°) and vertical (18° and 48°) field-of-view restrictions on the walking speed and...

Effects of field-of-view restriction on manoeuvring in a 3-D environment

Field-of-view (FOV) restrictions are known to affect human behaviour and to degrade performance for a range of different tasks. However, the relationship between human locomotion performance in complex environments and FOV size is currently not fully known. This paper examined the effects of FOV restrictions on the performance of participants...

Multisensory synchrony guides attention in dynamic cluttered environments

Effects of vield-of-view restrictions on speed and accuracy of manoeuvring

Effects of field-of-view restrictions on the speed and accuracy of participants performing a real-world manoeuvring task through an obstacled environment were investigated. Although field-of-view restrictions are known to affect human behaviour and to degrade performance for a range of different tasks, the relationship between human manoeuvring...

Motion sickness symptoms in a ship motion simulator: Effects of inside, outside, and no view

Vehicle motion characteristics differ between air, road, and sea environments, both vestibularly and visually. Effects of vision on motion sickness have been studied before, though less systematically in a naval setting. It is hypothesized that appropriate visual information on self-motion is beneficial in a naval setting and that task...

Image parameters for driving with indirect viewing systems

Indirect viewing systems such as tv cameras can potentially support drivers under low visibility conditions or when the driver's field of view (FOV) is restricted. In three experiments, we identified the critical image parameters of such systems on vehicle control. We used a taskbattery that measured lateral and longitudinal vehicle control in...

A puzzling percept of stimulus stabilization

A visual illusion is reported which comprises the following: when a monitor with a moving constant velocity grating is swayed in front of a subject, the grating may be perceived as freezing or decelerating on the screen. This percept appears to depend on the magnitude and direction of the retinal grating velocity, relative to that of the moni...

Selective attention in the visual field

Ergonomisch advies on-board unit

Van on-board unit (OBU's) voor automatische tolheffing in personenauto's geven de types "geintegreerd" en "Zwanehals" minimale uitzichtbeperkingen, i.t.t. het type "Horizon". Tevens worden ergonomische eisen voor OBU's geformuleerd.

Effects of location and form cueing on the allocation of attention in the visual field

Two experiments were conducted which tested the effect of two different types of cues on the allocation of attention in the visual field. Subjects responded to a target appearing either 6.5° to the right or to the left of fixation in a field with small randomly positioned line segments. The target form was either a circle or diamond in which a...

The effect of lead vehicles on speed choice under restricted sight distances

This study deals with the effect of restricted sight distance on drivers speed choice. It is hypothesized that speed choice is dependent on uncertainties with respect to road way preview. In two experiments the importance of uncertainty about the ability to respond adequately to a slow moving lead vehicle on speed choice is explored. In the...

Effects of vehicle handling characteristics on driving strategy

The time-to-line-crossing (TLC) concept has been used as a time-related measure to describe driving strategy. The purpose of this research is to analyze whether TLC might enlarge our understanding of the relationship between vehicle handling characteristics and a driver's looking and lateral control strategy in a straight-lane-keeping task....

Precognitive control: open- and closed-loop steering in a lane-change manoeuvre

This paper presents two experiments in which steering a lane-change manoeuvre is analysed as a precognitive control task. The suggestion that the dependence on instantaneous visual feedback is low during such a task was tested by analysing steering performance under conditions both with and without visual occlusion. Steering force served as the...