Measurement of auditory alleys in a virtual environment and their mathematical models

Ohkura, Michiko; Yanagida, Yasuyuki; Maeda, Takao; Tachi, Susumu

doi:10.1002/(sici)1520-684x(200004)31:4<12::aid-scj2>3.0.co;2-#

Syst. Comp. Jpn.

2000

DOI: 10.1002/(sici)1520-684x(200004)31:4<12::aid-scj2>3.0.co;2-#

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Measurement of auditory alleys in a virtual environment and their mathematical models

Michiko Ohkura

Yasuyuki Yanagida

Takao Maeda

et al.

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Cited by 2 publications

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“…In particular, concrete evidence for this idea is lacking in the auditory domain. Ohkura, Yanagida, Maeda and Tachi (2000) reported distortions in two auditory perceptual tasks (creating apparently parallel alleys and equidistant alleys) that were similar to distortions that occur in visual space (e.g., Battro, Netto, & Rozestraten, 1976;Indow & Watanabe, 1984). Whether or not these distortions generalize to include exocentric pointing in the auditory domain remains unclear.…”

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confidence: 84%

Misperception of exocentric directions in auditory space

et al. 2008

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Previous studies have demonstrated large errors (over 30°) in visually perceived exocentric directions (the direction between two objects that are both displaced from the observer's location; e.g., Philbeck et al., in press). Here, we investigated whether a similar pattern occurs in auditory space. Blindfolded participants either attempted to aim a pointer at auditory targets (an exocentric task) or gave a verbal estimate of the egocentric target azimuth. Targets were located at 20° to 160°a zimuth in the right hemispace. For comparison, we also collected pointing and verbal judgments for visual targets. We found that exocentric pointing responses exhibited sizeable undershooting errors, for both auditory and visual targets, that tended to become more strongly negative as azimuth increased (up to −19° for visual targets at 160°). Verbal estimates of the auditory and visual target azimuths, however, showed a dramatically different pattern, with relatively small overestimations of azimuths in the rear hemispace. At least some of the differences between verbal and pointing responses appear to be due to the frames of reference underlying the responses; when participants used the pointer to reproduce the egocentric target azimuth rather than the exocentric target direction relative to the pointer, the pattern of pointing errors more closely resembled that seen in verbal reports. These results show that there are similar distortions in perceiving exocentric directions in visual and auditory space.Keywords manual pointing; auditory space perception; perception / action; perceived direction; spatial cognition In light of the seemingly effortless accuracy with which we are typically able to interact with objects in the world, the fact that there are sizeable misperceptions of spatial relationships, even in the nearby environment, is remarkable (e.g., Doumen, Kappers, & Koenderink, 2005;Philbeck, 2000). A particularly striking example comes from distortions in perceiving exocentric directions-that is, perceiving the direction from one object to another, both of which are displaced from one's current viewing location. One way to study this involves asking observers to aim a pointer mounted just in front of the body at a nearby target (Haber, Haber, Penningroth, Novak, & Radgowski, 1993;Haun, Allen, & Wedell, 2005;Montello, Richardson, Hegarty, & Provenza, 1999). We have demonstrated large errors in this task, even when both the pointer and the target are within arm's reach (Philbeck, Sargent, Arthur & Dopkins, in press). When participants point without vision, mean errors increase with target eccentricity and peak at −32° for targets at 150° azimuth (i.e., the direction in a horizontal plane Corresponding Author: Joeanna C. Arthur, Department of Psychology, George Washington University, 2125 G. Street, NW, Washington, DC 20052, USA, e-mail: jarthur@gwu.edu, voice: 202-994-7008, fax: 202-994-1602. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a serv...

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Misperception of exocentric directions in auditory space

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On the use of forward kinematic models in visually guided hand position control—analysis based on ISLES model

et al. 2002

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Measurement of auditory alleys in a virtual environment and their mathematical models

Cited by 2 publications

References 14 publications

Misperception of exocentric directions in auditory space

Misperception of exocentric directions in auditory space

On the use of forward kinematic models in visually guided hand position control—analysis based on ISLES model

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