Universität zu Köln

Sandberg, Kristian ORCID: 0000-0001-6936-5487, Bibby, Bo Martin, Timmermans, Bert ORCID: 0000-0002-0404-8912, Cleeremans, Axel and Overgaard, Morten ORCID: 0000-0002-1215-5355 (2011). Measuring consciousness: Task accuracy and awareness as sigmoid functions of stimulus duration. Conscious. Cogn., 20 (4). S. 1659 - 1676. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1053-8100

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Abstract

When consciousness is examined using subjective ratings, the extent to which processing is conscious or unconscious is often estimated by calculating task performance at the subjective threshold or by calculating the correlation between accuracy and awareness. However, both these methods have certain limitations. In the present article, we propose describing task accuracy and awareness as functions of stimulus intensity (thus obtaining an accuracy and an awareness curve) as suggested by Koch and Preuschoff (2007). The estimated lag between the curves describes how much stimulus intensity must increase for awareness to change proportionally as much as accuracy and the slopes of the curves are used to assess how fast accuracy and awareness increases and whether awareness is dichotomous. The method is successfully employed to assess consciousness characteristics on data from four different awareness scales. (C) 2011 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sandberg, Kristian UNSPECIFIED orcid.org/0000-0001-6936-5487 UNSPECIFIED Bibby, Bo Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Timmermans, Bert UNSPECIFIED orcid.org/0000-0002-0404-8912 UNSPECIFIED Cleeremans, Axel UNSPECIFIED UNSPECIFIED UNSPECIFIED Overgaard, Morten UNSPECIFIED orcid.org/0000-0002-1215-5355 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-484468
DOI:	10.1016/j.concog.2011.09.002
Journal or Publication Title:	Conscious. Cogn.
Volume:	20
Number:	4
Page Range:	S. 1659 - 1676
Date:	2011
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1053-8100
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PROCESS-DISSOCIATION PROCEDURE; UNCONSCIOUS PERCEPTION; VISUAL-CORTEX; MEMORY; METHODOLOGIES; INHIBITION; KNOWLEDGE; FRAMEWORK; CAUTION; SCIENCE Multiple languages Psychology, Experimental Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48446