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Millisecond accuracy video display using OpenGL under Linux

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Stewart, Neil, 1974-. (2006) Millisecond accuracy video display using OpenGL under Linux. Behavior Research Methods, Vol.38 (No.1). pp. 142-145. ISSN 1554-351X

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Official URL: http://dx.doi.org/10.3758/BF03192759

Abstract

To measure people’s reaction times to the nearest millisecond, it is necessary to know exactly when a stimulus is displayed. This article describes how to display stimuli with millisecond accuracy on a normal CRT monitor, using a PC running Linux. A simple C program is presented to illustrate how this may be done within X Windows using the OpenGL rendering system. A test of this system is reported that demonstrates that stimuli may be consistently displayed with millisecond accuracy. An algorithm is presented that allows the exact time of stimulus presentation to be deduced, even if there are relatively large errors in measuring the display time.

Item Type:	Journal Article
Subjects:	B Philosophy. Psychology. Religion > BF Psychology Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
Divisions:	Faculty of Science > Psychology
Library of Congress Subject Headings (LCSH):	Psychology -- Computer simulation, Linux, OpenGL, Psychological apperatus, Psychology, Experimental
Journal or Publication Title:	Behavior Research Methods
Publisher:	Psychonomic Society, Inc.
ISSN:	1554-351X
Date:	February 2006
Volume:	Vol.38
Number:	No.1
Page Range:	pp. 142-145
Identification Number:	10.3758/BF03192759
Status:	Peer Reviewed
Access rights to Published version:	Open Access
URI:	http://wrap.warwick.ac.uk/id/eprint/611