Background stripes affect apparent speed of rotation

Stuart Anstis, Hiroyuki Ito, Patrick Cavanagh

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A gray line that rotated about its own center against a stationary background of vertical stripes appeared to double in perceptual speed as it rotated through the vertical position and thus momentarily aligned with the background. Four factors may contribute to this speed-up: (i) landmarks, in which the tip of the moving vertical line moves horizontally across the maximum number of stationary stripes; (ii) orientation repulsion of the moving line by the vertical stripes, which may distort the line's perceived position and hence its perceived speed; (iii) the orientation of an induced brightness pattern along the line; and (iv) the motion of the induced brightness pattern, which moves physically most rapidly along the line when the line is near vertical. To test these possibilities, an annulus display provided landmarks but no intersections, and this almost abolished the effect. A rotating-slit display provided an oriented, moving pattern that mimicked the induced brightness but had no landmarks, and this increased the effect. We conclude that the motion, but not the orientation, of the intersections [option (iv)] was responsible for the illusion. The fact that this motion along the length of the line affected the perceived speed of the line orthogonal to its own length indicates a failure on the part of the visual system to fully decouple tangential from radial motion.

Original languageEnglish
Pages (from-to)959-964
Number of pages6
JournalPerception
Volume35
Issue number7
DOIs
Publication statusPublished - Sep 13 2006

Fingerprint

Luminance
Display devices

All Science Journal Classification (ASJC) codes

  • Experimental and Cognitive Psychology
  • Ophthalmology
  • Sensory Systems
  • Artificial Intelligence

Cite this

Background stripes affect apparent speed of rotation. / Anstis, Stuart; Ito, Hiroyuki; Cavanagh, Patrick.

In: Perception, Vol. 35, No. 7, 13.09.2006, p. 959-964.

Research output: Contribution to journalArticle

Anstis, Stuart ; Ito, Hiroyuki ; Cavanagh, Patrick. / Background stripes affect apparent speed of rotation. In: Perception. 2006 ; Vol. 35, No. 7. pp. 959-964.
@article{442ba6560aee459f8691d5400357aa44,
title = "Background stripes affect apparent speed of rotation",
abstract = "A gray line that rotated about its own center against a stationary background of vertical stripes appeared to double in perceptual speed as it rotated through the vertical position and thus momentarily aligned with the background. Four factors may contribute to this speed-up: (i) landmarks, in which the tip of the moving vertical line moves horizontally across the maximum number of stationary stripes; (ii) orientation repulsion of the moving line by the vertical stripes, which may distort the line's perceived position and hence its perceived speed; (iii) the orientation of an induced brightness pattern along the line; and (iv) the motion of the induced brightness pattern, which moves physically most rapidly along the line when the line is near vertical. To test these possibilities, an annulus display provided landmarks but no intersections, and this almost abolished the effect. A rotating-slit display provided an oriented, moving pattern that mimicked the induced brightness but had no landmarks, and this increased the effect. We conclude that the motion, but not the orientation, of the intersections [option (iv)] was responsible for the illusion. The fact that this motion along the length of the line affected the perceived speed of the line orthogonal to its own length indicates a failure on the part of the visual system to fully decouple tangential from radial motion.",
author = "Stuart Anstis and Hiroyuki Ito and Patrick Cavanagh",
year = "2006",
month = "9",
day = "13",
doi = "10.1068/p5557",
language = "English",
volume = "35",
pages = "959--964",
journal = "Perception",
issn = "0301-0066",
publisher = "Pion Ltd.",
number = "7",

}

TY - JOUR

T1 - Background stripes affect apparent speed of rotation

AU - Anstis, Stuart

AU - Ito, Hiroyuki

AU - Cavanagh, Patrick

PY - 2006/9/13

Y1 - 2006/9/13

N2 - A gray line that rotated about its own center against a stationary background of vertical stripes appeared to double in perceptual speed as it rotated through the vertical position and thus momentarily aligned with the background. Four factors may contribute to this speed-up: (i) landmarks, in which the tip of the moving vertical line moves horizontally across the maximum number of stationary stripes; (ii) orientation repulsion of the moving line by the vertical stripes, which may distort the line's perceived position and hence its perceived speed; (iii) the orientation of an induced brightness pattern along the line; and (iv) the motion of the induced brightness pattern, which moves physically most rapidly along the line when the line is near vertical. To test these possibilities, an annulus display provided landmarks but no intersections, and this almost abolished the effect. A rotating-slit display provided an oriented, moving pattern that mimicked the induced brightness but had no landmarks, and this increased the effect. We conclude that the motion, but not the orientation, of the intersections [option (iv)] was responsible for the illusion. The fact that this motion along the length of the line affected the perceived speed of the line orthogonal to its own length indicates a failure on the part of the visual system to fully decouple tangential from radial motion.

AB - A gray line that rotated about its own center against a stationary background of vertical stripes appeared to double in perceptual speed as it rotated through the vertical position and thus momentarily aligned with the background. Four factors may contribute to this speed-up: (i) landmarks, in which the tip of the moving vertical line moves horizontally across the maximum number of stationary stripes; (ii) orientation repulsion of the moving line by the vertical stripes, which may distort the line's perceived position and hence its perceived speed; (iii) the orientation of an induced brightness pattern along the line; and (iv) the motion of the induced brightness pattern, which moves physically most rapidly along the line when the line is near vertical. To test these possibilities, an annulus display provided landmarks but no intersections, and this almost abolished the effect. A rotating-slit display provided an oriented, moving pattern that mimicked the induced brightness but had no landmarks, and this increased the effect. We conclude that the motion, but not the orientation, of the intersections [option (iv)] was responsible for the illusion. The fact that this motion along the length of the line affected the perceived speed of the line orthogonal to its own length indicates a failure on the part of the visual system to fully decouple tangential from radial motion.

UR - http://www.scopus.com/inward/record.url?scp=33748416855&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748416855&partnerID=8YFLogxK

U2 - 10.1068/p5557

DO - 10.1068/p5557

M3 - Article

C2 - 16970204

AN - SCOPUS:33748416855

VL - 35

SP - 959

EP - 964

JO - Perception

JF - Perception

SN - 0301-0066

IS - 7

ER -