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The Microgenesis of the watercolor effect

Reeves, Adam and Pinna, Baingio and Roxas, Felix (2013) The Microgenesis of the watercolor effect. Frontiers in psychology, Vol. 4 , Article 702. eISSN 1664-1078. Article.

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DOI: 10.3389/fpsyg.2013.00702


The “watercolor effect” is the wash of illusory color that fills in between two enclosing bichromatic contours. We studied the microgenesis of this illusion by varying the duration of the eliciting stimulus (a yellow/purple contour outlining the Mediterranean Sea) and by varying the duration of a blank interval from stimulus offset to an after-coming mask (the ISI). The illusory wash was rated in strength and also matched to a comparison disk of adjustable color but similar luminance. Results indicate that the watercolor effect grows rapidly as stimulus duration is increased to 100 ms and then grows much more slowly. Increasing the ISI beyond 10 ms had no effect, suggesting that the wash arises only during stimulation. Participants who recognized that the bounding contour depicted the Mediterranean reported twice as strong an illusory effect as those who did not, indicating that visual long-term memory modulates the watercolor effect despite the rapidity of its generation.

Item Type:Article
ID Code:9639
Uncontrolled Keywords:Color, illusions, microgenesis, masking noise, matching
Subjects:Area 11 - Scienze storiche, filosofiche, pedagogiche e psicologiche > M-PSI/01 Psicologia generale
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Architettura, Design e Urbanistica
Publisher:Frontiers Research Foundation
Copyright Holders:© 2013 Reeves, Pinna and Roxas
Deposited On:24 Feb 2014 11:17

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