eCite Digital Repository

Large repulsion, but not attraction, tilt illusions occur when stimulus parameters selectively favour either transient (M-like) or sustained (P-like) mechanisms

Citation

Smith, ST and Wenderoth, PM, Large repulsion, but not attraction, tilt illusions occur when stimulus parameters selectively favour either transient (M-like) or sustained (P-like) mechanisms, Vision Research: An International Journal for Functional Aspects of Vision, 39, (24) pp. 4113-4121. ISSN 0042-6989 (1999) [Refereed Article]

DOI: doi:10.1016/S0042-6989(99)00118-2

Abstract

A vertical test grating appears tilted away from a surrounding inducing grating which is 15 degrees from vertical (repulsion effect) but towards an inducer 75 degrees from vertical (attraction effect). This is the tilt illusion (TI) and similar effects occur when inducing and test stimuli are presented successively (tilt after-effect or TAE). When it was reported [Wolfe, J. (1984). Vision Research, 24, 1959-1964] that large repulsion TAEs occurred with short test flashes, Wolfe postulated that either there are distinct mechanisms which process brief and longer duration stimuli; or that there are distinct mechanisms which are not primarily concerned with duration but are differentially responsive to temporal parameters, amongst several others. Other evidence that TI attraction effects are not modulated by test flash duration resulted in an hypothesis that repulsion and attraction effects are mediated by transient and sustained mechanisms, respectively [Wenderoth, P., van der Zwan, R., & Johnstone, S. (1989). Perception, 18, 715-728]. We demonstrate that large repulsion TIs can be induced when parameters other than duration are manipulated, including contrast and spatial frequency but that these parameters fail to modulate attraction TIs. These results are consistent with some previous hypotheses regarding the origin of repulsion and attraction effects and with Wolfe's latter hypothesis but do not support the view that the two effects are processed, respectively, by transient and sustained mechanisms.

Item Details

Item Type:Refereed Article
Keywords:Tilt illusion; Magno/parvo; Sustained/transient; Orientation; Spatial frequency
Research Division:Medical and Health Sciences
Research Group:Neurosciences
Research Field:Sensory Systems
Objective Division:Health
Objective Group:Other Health
Objective Field:Health not elsewhere classified
Author:Smith, ST (Associate Professor Stuart Smith)
ID Code:85648
Year Published:1999
Web of Science® Times Cited:17
Deposited By:Health Sciences A
Deposited On:2013-07-26
Last Modified:2013-07-26
Downloads:0

Repository Staff Only: item control page