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Maintaining the ties that bind: The role of an intermediate visual memory store in the persistence of awareness 

Authors: Susanne Ferber ab; Stephen M. Emrich a
Affiliations:   a University of Toronto, Ontario, Canada
b The Rotman Research Institute, Toronto, Ontario, Canada
DOI: 10.1080/02643290601046598
Publication Frequency: 8 issues per year
Published in: journal Cognitive Neuropsychology, Volume 24, Issue 2 March 2007 , pages 187 - 210
First Published: March 2007
Formats available: HTML (English) : PDF (English)
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Abstract

Segregation and feature binding are essential to the perception and awareness of objects in a visual scene. When a fragmented line-drawing of an object moves relative to a background of randomly oriented lines, the previously hidden object is segregated from the background and consequently enters awareness. Interestingly, in such shape-from-motion displays, the percept of the object persists briefly when the motion stops, suggesting that the segregated and bound representation of the object is maintained in awareness. Here, we tested whether this persistence effect is mediated by capacity-limited working-memory processes, or by the amount of object-related information available. The experiments demonstrate that persistence is affected mainly by the proportion of object information available and is independent of working-memory limits. We suggest that this persistence effect can be seen as evidence for an intermediate, form-based memory store mediating between sensory and working memory.
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