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  Further Evidence for the Representation of Change without Awareness

Thornton, I., & Fernandez-Duque, D. (2001). Further Evidence for the Representation of Change without Awareness. In 11th European Congress on Eye Movements (ECEM11).

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-E232-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-AEA3-F
Genre: Meeting Abstract

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Thornton, IM1, 2, Author              
Fernandez-Duque, D, 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              

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 Abstract: Recently we suggested that studies of change blindness may be telling us more about the limits of explicit reporting/visual awareness than about the limits of visual representation (Fernandez-Duque Thornton, 2000; Thornton Fernandez-Duque, 2000). We coupled simple change blindness displays -- in which one rectangle could change orientation -- with two types of implicit secondary tasks: a 2AFC localization paradigm or a speeded orientation priming paradigm. In both cases we found that undetected changes influenced patterns of responses on the secondary tasks. While some researchers have recently begun to question the notion of implicit detection of change (see Mitroff Simons, OPAM 2000; VSS 2001), here I will present 3 additional lines of evidence to support the claim that the visual system can represent change in the absence of awareness. 1) First, I will review eye movement studies from several labs showing differential gaze patterns when changes go unnoticed. 2) Second, I will present ERP data from our lab (Fernandez-Duque et al., submitted) showing that neural signatures of undetected changes are distinct from those to detected changes or catch trials. 3) Thirdly, I will describe a new behavioral paradigm that is highly robust against contamination from 'strategic' responses, thus providing even stronger evidence for implicit detection of change.

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 Dates: 2001-08
 Publication Status: Published online
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 Identifiers: BibTex Citekey: 1408
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Title: 11th European Congress on Eye Movements (ECEM11)
Place of Event: Turku, Finland
Start-/End Date: 2001-08-22 - 2001-08-25

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Title: 11th European Congress on Eye Movements (ECEM11)
Source Genre: Proceedings
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