Distance perception in real and virtual environments

Plumert, Jodie M.; Kearney, Joseph K.; Cremer, James F.

doi:10.1145/1012551.1012557

Cited by 73 publications

(105 citation statements)

References 17 publications

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“…A disadvantage is that the action is imagined instead of performed, which involves potentially confounding mental processes. However, Decety et al [4] and Plumert et al [14] compared blind walking and timed walking to real-world targets, and found excellent accuracy for both methods.…”

Section: Distance Perception Measurement Protocolsmentioning

confidence: 99%

“…Another shortcoming of blind walking, which relates to the experiment reported here, is that it cannot be used to indicate a depth judgment in a large-screen immersive display, because there is not enough room to blindly walk to a target that is located beyond the display's screen. Plumert et al [14] and Ziemer et al [20] used timed walking to measure distance judg- ments in a CAVE. Perceptual matching has also been used in virtual environments (e.g., [5,16,18,19]); Bodenheimer et al [2] used perceptual bisection to measure distance judgments in virtual and real-world environments.…”

Section: Measurement Protocols In Virtual Environmentsmentioning

confidence: 99%

“…All of these protocols can indicate larger depth judgments than the available physical space -verbal estimation and timed walking require no observer movement -and so all of them can potentially be used with large-screen immersive displays. Although timed walking has been previously studied with large-screen displays, we are only aware of the two published articles from the University of Iowa (Plumert et al [14], Ziemer et al [20]). Finally, to the best of our knowledge, triangulated walking has not yet been studied with large-screen displays.…”

Section: Measurement Protocols In Virtual Environmentsmentioning

confidence: 99%

“…These include both augmented reality (e.g., [5,8,16]) and large-screen immersive displays [14,20]. It may be that depth perception operates differently when the virtual world exists as an extension of the real world, and this motivates experiments that examine these situations.…”

Section: Distance Perception and Ve Display Devicesmentioning

confidence: 99%

“…Plumert et al [14] conducted the studies in a 3-walled CAVE, with a front wall and two side walls; CAVE graphics were presented non-stereoscopically, but were viewed binocularly. The CAVE was one environment; the other was a grassy field in front of a large building, which was modeled and displayed in the CAVE.…”

Section: Previous Workmentioning

confidence: 99%

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Measurement Protocols for Medium-Field Distance Perception in Large-Screen Immersive Displays

Klein

Swan

Schmidt

et al. 2009

2009 IEEE Virtual Reality Conference

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How do users of virtual environments perceive virtual space? Many experiments have explored this question, but most of these have used head-mounted immersive displays. This paper reports an experiment that studied large-screen immersive displays at mediumfield distances of 2 to 15 meters. The experiment measured egocentric depth judgments in a CAVE, a tiled display wall, and a realworld outdoor field as a control condition. We carefully modeled the outdoor field to make the three environments as similar as possible. Measuring egocentric depth judgments in large-screen immersive displays requires adapting new measurement protocols; the experiment used timed imagined walking, verbal estimation, and triangulated blind walking.We found that depth judgments from timed imagined walking and verbal estimation were very similar in all three environments. However, triangulated blind walking was accurate only in the outdoor field; in the large-screen immersive displays it showed underestimation effects that were likely caused by insufficient physical space to perform the technique. These results suggest using timed imagined walking as a primary protocol for assessing depth perception in large-screen immersive displays. We also found that depth judgments in the CAVE were more accurate than in the tiled display wall, which suggests that the peripheral scenery offered by the CAVE is helpful when perceiving virtual space.

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Section: Distance Perception Measurement Protocolsmentioning

confidence: 99%

Section: Measurement Protocols In Virtual Environmentsmentioning

confidence: 99%

Section: Measurement Protocols In Virtual Environmentsmentioning

confidence: 99%

Section: Distance Perception and Ve Display Devicesmentioning

confidence: 99%

Section: Previous Workmentioning

confidence: 99%

See 3 more Smart Citations

Measurement Protocols for Medium-Field Distance Perception in Large-Screen Immersive Displays

Klein

Swan

Schmidt

et al. 2009

2009 IEEE Virtual Reality Conference

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The effect of feedback training on distance estimation in virtual environments

Richardson

Waller

2005

Appl. Cognit. Psychol.

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It is often noted that distances are significantly underestimated in computer-simulated (virtual) environments. Two experiments examine observers' ability to use error corrective feedback to improve the accuracy of judgments of egocentric and exocentric distances. In Experiment 1, observers viewed objects in an immersive virtual environment and estimated their distance through a blindfolded walking task. Different groups received feedback on either egocentric, exocentric or none of these judgments. Receiving feedback improved observers' ability to estimate only those distances for which feedback was provided. These effects persisted for at least 1 week. In Experiment 2, observers estimated egocentric distance by means of both a direct and indirect walking task. Receiving feedback on the direct walking task predominantly improved direct estimates and not indirect estimates. These findings suggest that although feedback training offers a relatively straightforward and immediate way of overcoming problems of distance estimation, its effects are specific to both the type of judgment and the type of response.

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Memory and navigation: Compression of space varies with route length and turns

2015

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For memory to be efficient and useful during recall, problem-solving, and planning, retrieval must be compressed in time. Evidence from rodents suggests that neural compression during replay of spatial memories varies widely, with a range of compression ratios reported from 6:1 to 64:1. Anecdotal evidence suggests that similar compression occurs during mental navigation in humans: we recall how to get from one place to another countless times almost every day of our lives, and this recall never takes as long as physically travelling those routes would take. In this experiment we sought to determine whether this behavioural compression could be measured during mental navigation in humans (spatial memory replay), and which factors might affect the compression of such spatial memories. To this end, thirty participants mentally navigated routes between two landmarks, which varied in length and number of turns, as we measured replay times and recorded ratings of familiarity, detail, and presence. A multi-level model was used to determine which factors were associated with variation in compression. Route length and number of turns emerged from this model as significantly correlated with compression, such that longer routes were more compressed while compression was attenuated as the number of turns in a route increased. This suggests that compression during recall may be affected by specific features of a route, especially those that may act to segment the space or event being represented.

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Distance perception in real and virtual environments

Cited by 73 publications

References 17 publications

Measurement Protocols for Medium-Field Distance Perception in Large-Screen Immersive Displays

Measurement Protocols for Medium-Field Distance Perception in Large-Screen Immersive Displays

The effect of feedback training on distance estimation in virtual environments

Memory and navigation: Compression of space varies with route length and turns

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