English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Breaking the Stability of Perceptual Instability: Adaptation and Priming in Ambiguous Figure Perception

Conrad, V., Kourtzi, Z., & Welchman, A. (2006). Breaking the Stability of Perceptual Instability: Adaptation and Priming in Ambiguous Figure Perception. Poster presented at 9th Tübingen Perception Conference (TWK 2006), Tübingen, Germany.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-D28B-F Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C4BF-6
Genre: Poster

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Conrad, V1, 2, Author              
Kourtzi, Z, Author              
Welchman, A, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

Content

show
hide
Free keywords: -
 Abstract: Ambiguous figure reversal involves a neural mechanism that limits the number of perceptual organizations that can be consciously experienced at a given moment. So how can perceptual experience be stable and continuous in the presence of alternative interpretations of the same physical stimulus? Recent demonstrations using bistable stimuli such as the Necker cube have revealed that repetitive intermittent presentation leads to a stabilization of the percept [1,2]. According to Gepshtein and Kubovy [3] two temporal processes play an important role in the perception of ambiguous figures: adaptation and hysteresis. In the present study we investigated the effects of reference stimulus duration and interstimulus interval length upon transition probability using ambiguous and unambiguous versions of the Mach Card. On the basis of previous research findings we predicted that long preexposure periods to the reference stimulus lead to adaptation effects. Furthermore we hypothesized that the length of the interstimulus interval between reference and test stimulus affects the subsequent perception of the ambiguous test stimulus. As expected, participants displayed a convex bias in their responses to the ambiguous Mach Card reference stimulus—indicating that they perceived the ambiguous Mach Card as a standing book with the spine pointing towards them. The results of the present experiment suggest that prolonged duration times of ambiguous and unambiguous reference stimuli lead to adaptation effects in the perception of the ambiguous test stimulus. Examining the effects of different interstimulus interval lengths, we demonstrated that short reference stimulus duration times in combination with long interstimulus intervals seem to lock the percept in its present state and the subsequent ambiguous test stimulus will be perceived in the identical configuration. Further analysis will reveal if different adaptation and priming mechanisms are active for convex and concave images, given the inherent tuning of the visual system to convexity. The investigation of these history effects will help us to identify the relative contribution of stimulus-driven and cognitive factors to the perception of ambiguous 3D shapes.

Details

show
hide
Language(s):
 Dates: 2006-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: BibTex Citekey: 4827
 Degree: -

Event

show
hide
Title: 9th Tübingen Perception Conference (TWK 2006)
Place of Event: Tübingen, Germany
Start-/End Date: 2006-03-03 - 2006-03-05

Legal Case

show

Project information

show

Source 1

show
hide
Title: 9th Tübingen Perception Conference: TWK 2006
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor            
Gillner, S, Editor            
Mallot, HA, Editor            
Ulrich, R, Editor
Affiliations:
1 Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794            
Publ. Info: Kirchentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 50 Identifier: ISBN: 3-927091-73-1