Discrimination of moving events which accelerate or decelerate over the listening interval

Perrott, David R.; Costantino, Brian L.; Ball, Jennifer M.

doi:10.1121/1.405553

Cited by 30 publications

(15 citation statements)

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“…Some support a system that infers motion direction and speed from a series of positional estimates accumulated over time-the so-called snapshot hypothesis (Grantham 1986). Others point to the reliable perception of motion properties such as acceleration and deceleration, where the time and distance travelled by motion stimuli are equated, as evidence for more sophisticated motion processing than that offered by a simple position-based mechanism (Perrott and Marlborough 1989;Perrott et al 1992). Our results are clearly more compatible with the latter proposal.…”

Section: Discussionsupporting

confidence: 81%

Distortions of perceived auditory and visual space following adaptation to motion

2008

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Adaptation to visual motion can induce marked distortions of the perceived spatial location of subsequently viewed stationary objects. These positional shifts are direction specific and exhibit tuning for the speed of the adapting stimulus. In this study, we sought to establish whether comparable motion-induced distortions of space can be induced in the auditory domain. Using individually measured head related transfer functions (HRTFs) we created auditory stimuli that moved either leftward or rightward in the horizontal plane. Participants adapted to unidirectional auditory motion presented at a range of speeds and then judged the spatial location of a brief stationary test stimulus. All participants displayed direction-dependent and speed-tuned shifts in perceived auditory position relative to a 'no adaptation' baseline measure. To permit direct comparison between effects in different sensory domains, measurements of visual motion-induced distortions of perceived position were also made using stimuli equated in positional sensitivity for each participant. Both the overall magnitude of the observed positional shifts, and the nature of their tuning with respect to adaptor speed were similar in each case. A third experiment was carried out where participants adapted to visual motion prior to making auditory position judgements. Similar to the previous experiments, shifts in the direction opposite to that of the adapting motion were observed. These results add to a growing body of evidence suggesting that the neural mechanisms that encode visual and auditory motion are more similar than previously thought.

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Section: Discussionsupporting

confidence: 81%

Distortions of perceived auditory and visual space following adaptation to motion

2008

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“…At low horizontal angular velocities (below 20°/s), the MAMA at the midline (0°) is relatively small (on the order of 2-8°; Perrott and Marlborough [1989] reported 1°) but becomes larger (10°-20°) as velocity increases (Carlile and Best, 2002;Chandler and Grantham, 1992;Harris and Sergeant, 1971;Perrott, 1982;Perrott et al, 1993;Saberi and Perrott, 1990). Grantham (1997) reported MAMAs of 4.8° and 7.8° at velocities of 20°/s and 60°/s, respectively.…”

Section: Perception Of Moving Sound Sourcesmentioning

confidence: 99%

Auditory Spatial Perception: Auditory Localization

Łȩtowski¹,

Letowski²

2012

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“…Such a snapshot model holds that computational mechanisms supporting sound localization are used to compute sound-source movement. Other psychophysical studies, however, point to findings on the perception of velocity, acceleration, and Doppler-shift phenomena [5,6] as evidence for a specialized motion processing system.…”

Section: Introductionmentioning

confidence: 99%

Human cortical auditory motion areas are not motion selective

et al. 2004

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The existence of a specialized mechanism supporting auditory motion processing in humans is a matter of debate in the psychophysical literature. Recent functional neuroimaging data appear to have resolved the debate in favor of a specialized motion system in that several studies have found cortical regions that seem to be motion selective. While all these studies contrast some form of moving auditory stimulation with a stationary stimulus, none have adequately controlled for the possibility that these areas are simply computing sound-source location and not motion per se: a moving stimulus varies in spatial location as well as motion, and so a system computing spatial location (and not motion) would be activated in response to both a moving and stationary sound source. To control for this possibility, ten subjects were scanned while listening to moving stimuli and while listening to stationary stimuli that varied randomly in spatial location. Consistent with previous imaging studies, we found that a motion stimulus when contrasted with rest (scanner noise) activated STG/planum temporale (bilaterally) and right parietal lobe. However, stationary stimuli presented at varying locations activated these regions equally well, arguing against the existence of specialized motion-processing areas in human cortex.

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Discrimination of moving events which accelerate or decelerate over the listening interval

Cited by 30 publications

References 0 publications

Distortions of perceived auditory and visual space following adaptation to motion

Distortions of perceived auditory and visual space following adaptation to motion

Auditory Spatial Perception: Auditory Localization

Human cortical auditory motion areas are not motion selective

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