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Tachistoscopic illumination and masking of real scenes

Content Provider	PubMed Central
Author	David, Chichka Philbeck, John W. Gajewski, Daniel A.
Abstract	Tachistoscopic presentation of scenes has been valuable for studying the emerging properties of visual scene representations. The spatial aspects of this work have generally been focused on the conceptual locations (e.g., next to the refrigerator) and the directional locations of objects in 2D arrays and/or images. Less is known about how the perceived egocentric distance of objects develops. Here we describe a novel system for presenting brief glimpses of a real-world environment, followed by a mask. The system includes projectors with mechanical shutters for projecting the fixation and masking images, a set of LED floodlights for illuminating the environment, and computer-controlled electronics to set the timing and initiate the process. Because a real environment is used, most visual distance and depth cues may be manipulated using traditional methods. The system is inexpensive, robust, and its components are readily available in the marketplace. This paper describes the system and the timing characteristics of each component. Verification of the ability to control exposure to time scales as low as a few milliseconds is demonstrated.
Related Links	http://dx.doi.org/10.3758/s13428-014-0449-z
Ending Page	52
Page Count	8
Starting Page	45
File Format	PDF
ISSN	15543528
e-ISSN	15543528
Journal	Behavior research methods
Issue Number	1
Volume Number	47
Language	English
Publisher Date	2015-03-01
Access Restriction	Open
Subject Keyword	Psychology (miscellaneous) Experimental and Cognitive Psychology Psychology(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Arts and Humanities Developmental and Educational Psychology

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