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Keeping it short: A comparison of methods for brief picture presentation.
Stockholm University, Faculty of Social Sciences, Department of Psychology.
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2004 (English)In: Psychol Sci, ISSN 0956-7976, Vol. 15, no 4, 282-5 p.Article in journal (Refereed) Published
Abstract [en]

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


Place, publisher, year, edition, pages
2004. Vol. 15, no 4, 282-5 p.
Keyword [en]
Consciousness/physiology, Humans, Perceptual Masking/*physiology, Time Factors, Visual Perception/*physiology
URN: urn:nbn:se:su:diva-19271PubMedID: 15043649OAI: diva2:185795
Available from: 2008-01-15 Created: 2008-01-15 Last updated: 2011-01-12Bibliographically approved

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