Default perception of high-speed motion

Mark Wexler, Andrew Glennerster, Patrick Cavanagh, Hiroyuki Ito, Takeharu Seno

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

When human observers are exposed to even slight motion signals followed by brief visual transients-stimuli containing no detectable coherent motion signals-they perceive large and salient illusory jumps. This visually striking effect, which we call "high phi," challenges well-entrenched assumptions about the perception of motion, namely the minimal-motion principle and the breakdown of coherent motion perception with steps above an upper limit called dmax. Our experiments with transients, such as texture randomization or contrast reversal, show that the magnitude of the jump depends on spatial frequency and transient duration-but not on the speed of the inducing motion signals-and the direction of the jump depends on the duration of the inducer. Jump magnitude is robust across jump directions and different types of transient. In addition, when a texture is actually displaced by a large step beyond the upper step size limit of dmax, a breakdown of coherent motion perception is expected; however, in the presence of an inducer, observers again perceive coherent displacements at or just above dmax. In summary, across a large variety of stimuli, we find that when incoherent motion noise is preceded by a small bias, instead of perceiving little or no motion-as suggested by the minimal-motion principle-observers perceive jumps whose amplitude closely follows their own dmax limits.

Original languageEnglish
Pages (from-to)7080-7085
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume110
Issue number17
DOIs
Publication statusPublished - Apr 23 2013

Fingerprint

Motion Perception
Random Allocation
Noise
Direction compound

All Science Journal Classification (ASJC) codes

  • General

Cite this

Default perception of high-speed motion. / Wexler, Mark; Glennerster, Andrew; Cavanagh, Patrick; Ito, Hiroyuki; Seno, Takeharu.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 110, No. 17, 23.04.2013, p. 7080-7085.

Research output: Contribution to journalArticle

Wexler, Mark ; Glennerster, Andrew ; Cavanagh, Patrick ; Ito, Hiroyuki ; Seno, Takeharu. / Default perception of high-speed motion. In: Proceedings of the National Academy of Sciences of the United States of America. 2013 ; Vol. 110, No. 17. pp. 7080-7085.
@article{2da0e39c25dd4180b0ec8580a480aa45,
title = "Default perception of high-speed motion",
abstract = "When human observers are exposed to even slight motion signals followed by brief visual transients-stimuli containing no detectable coherent motion signals-they perceive large and salient illusory jumps. This visually striking effect, which we call {"}high phi,{"} challenges well-entrenched assumptions about the perception of motion, namely the minimal-motion principle and the breakdown of coherent motion perception with steps above an upper limit called dmax. Our experiments with transients, such as texture randomization or contrast reversal, show that the magnitude of the jump depends on spatial frequency and transient duration-but not on the speed of the inducing motion signals-and the direction of the jump depends on the duration of the inducer. Jump magnitude is robust across jump directions and different types of transient. In addition, when a texture is actually displaced by a large step beyond the upper step size limit of dmax, a breakdown of coherent motion perception is expected; however, in the presence of an inducer, observers again perceive coherent displacements at or just above dmax. In summary, across a large variety of stimuli, we find that when incoherent motion noise is preceded by a small bias, instead of perceiving little or no motion-as suggested by the minimal-motion principle-observers perceive jumps whose amplitude closely follows their own dmax limits.",
author = "Mark Wexler and Andrew Glennerster and Patrick Cavanagh and Hiroyuki Ito and Takeharu Seno",
year = "2013",
month = "4",
day = "23",
doi = "10.1073/pnas.1213997110",
language = "English",
volume = "110",
pages = "7080--7085",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
number = "17",

}

TY - JOUR

T1 - Default perception of high-speed motion

AU - Wexler, Mark

AU - Glennerster, Andrew

AU - Cavanagh, Patrick

AU - Ito, Hiroyuki

AU - Seno, Takeharu

PY - 2013/4/23

Y1 - 2013/4/23

N2 - When human observers are exposed to even slight motion signals followed by brief visual transients-stimuli containing no detectable coherent motion signals-they perceive large and salient illusory jumps. This visually striking effect, which we call "high phi," challenges well-entrenched assumptions about the perception of motion, namely the minimal-motion principle and the breakdown of coherent motion perception with steps above an upper limit called dmax. Our experiments with transients, such as texture randomization or contrast reversal, show that the magnitude of the jump depends on spatial frequency and transient duration-but not on the speed of the inducing motion signals-and the direction of the jump depends on the duration of the inducer. Jump magnitude is robust across jump directions and different types of transient. In addition, when a texture is actually displaced by a large step beyond the upper step size limit of dmax, a breakdown of coherent motion perception is expected; however, in the presence of an inducer, observers again perceive coherent displacements at or just above dmax. In summary, across a large variety of stimuli, we find that when incoherent motion noise is preceded by a small bias, instead of perceiving little or no motion-as suggested by the minimal-motion principle-observers perceive jumps whose amplitude closely follows their own dmax limits.

AB - When human observers are exposed to even slight motion signals followed by brief visual transients-stimuli containing no detectable coherent motion signals-they perceive large and salient illusory jumps. This visually striking effect, which we call "high phi," challenges well-entrenched assumptions about the perception of motion, namely the minimal-motion principle and the breakdown of coherent motion perception with steps above an upper limit called dmax. Our experiments with transients, such as texture randomization or contrast reversal, show that the magnitude of the jump depends on spatial frequency and transient duration-but not on the speed of the inducing motion signals-and the direction of the jump depends on the duration of the inducer. Jump magnitude is robust across jump directions and different types of transient. In addition, when a texture is actually displaced by a large step beyond the upper step size limit of dmax, a breakdown of coherent motion perception is expected; however, in the presence of an inducer, observers again perceive coherent displacements at or just above dmax. In summary, across a large variety of stimuli, we find that when incoherent motion noise is preceded by a small bias, instead of perceiving little or no motion-as suggested by the minimal-motion principle-observers perceive jumps whose amplitude closely follows their own dmax limits.

UR - http://www.scopus.com/inward/record.url?scp=84876875301&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84876875301&partnerID=8YFLogxK

U2 - 10.1073/pnas.1213997110

DO - 10.1073/pnas.1213997110

M3 - Article

C2 - 23572578

AN - SCOPUS:84876875301

VL - 110

SP - 7080

EP - 7085

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 17

ER -