| Keeping it short: a comparison of methods for brief picture presentation. | |
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MedLine Citation:
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PMID: 15043649 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Research has shown that backward masking is a powerful tool for studying unconscious mental processes. Whereas studies have traditionally presented stimuli using cathode-ray tube (CRT) monitors or mechanical shutters together with slide projectors, recent studies (mainly in functional magnetic resonance imaging, fMRI) have begun to use methods based on liquid crystal displays (LCDs) and thin-film transistor (TFT) technology. However, because of differences in technology, all methods may not be equally suited for masking. When methods were compared for their accuracy in presenting pictures at short durations, LCD and TFT presentations had poor accuracy, but shutter and CRT presentations had better accuracy. Because CRTs interfere with the imaging process in fMRI, we recommend the use of mechanical shutters. However, our results may not generally apply to all displays, so we advise researchers to validate the presentation parameters of their displays. The procedure described here may be useful for that purpose. |
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Authors:
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Stefan Wiens; Peter Fransson; Thomas Dietrich; Peter Lohmann; Martin Ingvar; Arne Ohman |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Psychological science Volume: 15 ISSN: 0956-7976 ISO Abbreviation: Psychol Sci Publication Date: 2004 Apr |
Date Detail:
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Created Date: 2004-03-26 Completed Date: 2004-05-11 Revised Date: 2011-05-20 |
Medline Journal Info:
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Nlm Unique ID: 9007542 Medline TA: Psychol Sci Country: United States |
Other Details:
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Languages: eng Pagination: 282-5 Citation Subset: IM |
Affiliation:
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Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden. stefan.wiens@cns.ki.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Consciousness
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physiology Humans Perceptual Masking / physiology* Time Factors Visual Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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