Top-down influences on ambiguous perception: the role of stable and transient states of the observer

The world as it appears to the viewer is the result of a complex process of inference performed by the brain. The validity of this apparently counter-intuitive assertion becomes evident whenever we face noisy, feeble or 
The world as it appears to the viewer is the result of a complex process of inference performed by the brain. The validity of this apparently counter-intuitive assertion becomes evident whenever we face noisy, feeble or ambiguous visual stimulation: in these conditions, the state of the observer may play a decisive role in determining what is currently perceived. On this background, ambiguous perception and its amenability to top-down influences can be employed as an empirical paradigm to explore the principles of perception. Here we offer an overview of both classical and recent contributions on how stable and transient states of the observer can impact ambiguous perception. As to the influence of the stable states of the observer, we show that what is currently perceived can be influenced (1) by cognitive and affective aspects, such as meaning, prior knowledge, motivation, and emotional content and (2) by individual differences, such as gender, handedness, genetic inheritance, clinical conditions, and personality traits and by (3) learning and conditioning. As to the impact of transient states of the observer, we outline the effects of (4) attention and (5) voluntary control, which have attracted much empirical work along the history of ambiguous perception. In the huge literature on the topic we trace a difference between the observer's ability to control dominance (i.e., the maintenance of a specific percept in visual awareness) and reversal rate (i.e., the switching between two alternative percepts). Other transient states of the observer that have more recently drawn researchers' attention regard (6) the effects of imagery and visual working memory. (7) Furthermore, we describe the transient effects of prior history of perceptual dominance. (8) Finally, we address the currently available computational models of ambiguous perception and how they can take into account the crucial share played by the state of the observer in perceiving ambiguous displays.
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Author:Lisa Scocchia, Matteo Valsecchi, Jochen Triesch
URN:urn:nbn:de:hebis:30:3-514882
DOI:http://dx.doi.org/10.3389/fnhum.2014.00979
ISSN:1662-5161
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=25538601
Parent Title (English):Frontiers in human neuroscience
Publisher:Frontiers Research Foundation
Place of publication:Lausanne
Contributor(s):Baingio Pinna
Document Type:Article
Language:English
Year of Completion:2014
Date of first Publication:2014/12/08
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/11/06
Tag:ambiguous perception; ambiguous structure-from-motion (SFM); binocular rivalry; bistability; modeling; reversible figures; top-down control
Volume:8
Issue:Art. 979
Pagenumber:18
First Page:1
Last Page:18
Note:
Copyright © 2014 Scocchia, Valsecchi and Triesch. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
HeBIS PPN: 455343403
Institutes:Physik
Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0

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