Movement Parallax and Distance Perception in the Grasshopper (Phaulacridium Vittatum (Sjöstedt)): Short Communications

1980 ◽  
Vol 86 (1) ◽  
pp. 337-340
Author(s):  
E. S. ERIKSSON
Keyword(s):  
Distance Perception ◽  
Movement Parallax

Monocular Movement Parallax and Near-Space Perception

Perception ◽  
1973 ◽  
Vol 2 (2) ◽  
pp. 135-146 ◽  
Author(s):  
G Johansson
Keyword(s):  
Distance Perception ◽  
Stimulus Change ◽  
Space Perception ◽  
Head Movements ◽  
Experimental Conditions ◽  
Distance Information ◽  
Near Space ◽  
Movement Parallax ◽  
Perceptual Systems ◽  
Pattern Transformation

Monocular perception of absolute distances in near space (<2 m) is discussed and studied experimentally. Stimulus change in time and sensory co-action (visual plus kinestethic) are in the theoretical analysis regarded as essential. Therefore movement parallax due to voluntary head movements has been introduced, in the experiments, as a hypothetical main cue, and perspective pattern transformation as a probably important side cue together with accommodation. (In ‘natural’ monocular perception these cues, in combination, are always available in near-space perception.) Under these experimental conditions all subjects exhibited approximately adequate (veridical) distance perception. This positive result, which diverges from the commonly accepted views about absolute-distance information, is tentatively regarded as an effect of the combination of cues and of methodological improvements introduced in the experiments. The result is taken as an indication of the fruitfulness of Gibson's conception of perceptual systems.

scholarly journals Attack Behaviour and Distance Perception in the Australian Bulldog Ant Myrmecia Nigriceps

1985 ◽  
Vol 119 (1) ◽  
pp. 115-131 ◽  
Author(s):  
E. Sture Eriksson
Keyword(s):  
Binocular Disparity ◽  
Distance Perception ◽  
Zero Point ◽  
Effective Range ◽  
Moving Targets ◽  
Freely Moving ◽  
Movement Parallax ◽  
Extract Information

The behaviour of the Australian bulldog ant Myrmecia nigriceps (Fr. Smith) has been studied by using moving targets characterized by sizedistance equivalence in relation to a stationary zero-point. The attack behaviour of freely moving animals demonstrated that the ants can discriminate between different targets, in the range of 5–80 cm, using movement parallax to extract information about the targets. By studying the antenna response it was possible to demonstrate that the stationary bulldog ant can utilize binocular disparity information and that this mechanism has an effective range of about 90 mm.

Visually Directed Actions as Indicators of Distance Perception in Real and Virtual Environments

2004 ◽  
Author(s):  
Cynthia S. Sahm ◽  
Sarah H. Creem-Regehr ◽  
William B. Thompson ◽  
Peter Willemsen
Keyword(s):  
Virtual Environments ◽  
Distance Perception

Accurate distance perception assessed by two triangulation methods

1991 ◽  
Author(s):  
Sergio S. Fukusima ◽  
Jack M. Loomis ◽  
Jose A. da Silva
Keyword(s):  
Distance Perception

scholarly journals The foggy effect of egocentric distance in a nonverbal paradigm

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bo Dong ◽  
Airui Chen ◽  
Yuting Zhang ◽  
Yangyang Zhang ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Distance Perception ◽  
Matching Task ◽  
Egocentric Distance ◽  
Accident Rate ◽  
Estimation Task ◽  
Distance Range ◽  
Verbal Estimation ◽  
Vista Space ◽  
Visual Matching ◽  
Speed Perception

AbstractInaccurate egocentric distance and speed perception are two main explanations for the high accident rate associated with driving in foggy weather. The effect of foggy weather on speed has been well studied. However, its effect on egocentric distance perception is poorly understood. The paradigm for measuring perceived egocentric distance in previous studies was verbal estimation instead of a nonverbal paradigm. In the current research, a nonverbal paradigm, the visual matching task, was used. Our results from the nonverbal task revealed a robust foggy effect on egocentric distance. Observers overestimated the egocentric distance in foggy weather compared to in clear weather. The higher the concentration of fog, the more serious the overestimation. This effect of fog on egocentric distance was not limited to a certain distance range but was maintained in action space and vista space. Our findings confirm the foggy effect with a nonverbal paradigm and reveal that people may perceive egocentric distance more "accurately" in foggy weather than when it is measured with a verbal estimation task.

Estimating Distances in Action Space in Augmented Reality

2021 ◽  
Vol 18 (2) ◽  
pp. 1-16
Author(s):  
Holly C. Gagnon ◽  
Carlos Salas Rosales ◽  
Ryan Mileris ◽  
Jeanine K. Stefanucci ◽  
Sarah H. Creem-Regehr ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Real World ◽  
Distance Measure ◽  
Distance Perception ◽  
Action Space ◽  
Indoor Environments ◽  
Verbal Reports ◽  
Visual Matching ◽  
Microsoft Hololens ◽  
Real Person

Augmented reality ( AR ) is important for training complex tasks, such as navigation, assembly, and medical procedures. The effectiveness of such training may depend on accurate spatial localization of AR objects in the environment. This article presents two experiments that test egocentric distance perception in augmented reality within and at the boundaries of action space (up to 35 m) in comparison with distance perception in a matched real-world ( RW ) environment. Using the Microsoft HoloLens, in Experiment 1, participants in two different RW settings judged egocentric distances (ranging from 10 to 35 m) to an AR avatar or a real person using a visual matching measure. Distances to augmented targets were underestimated compared to real targets in the two indoor, RW contexts. Experiment 2 aimed to generalize the results to an absolute distance measure using verbal reports in one of the indoor environments. Similar to Experiment 1, distances to augmented targets were underestimated compared to real targets. We discuss these findings with respect to the importance of methodologies that directly compare performance in real and mediated environments, as well as the inherent differences present in mediated environments that are “matched” to the real world.

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