Abstract
We present a program for MATLAB that generates and presents theheterochromatic fusion nystagmus stimulus. This stimulus allows assessment of isoluminant states through recordings of reflexive eye movements (optokinetic nystagmus). The reflexive nature of the subject’s response makes this stimulus especially useful with nonverbal subjects, such as children and animals. Unfortunately, the stimulus is complex and difficult to program. By presenting the present program, we hope to help those who wish to use this tool in their research. The code of the function can be downloaded at www. dal.ca/~mcmullen/downloads.html.
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References
Brainard, D. H. (1997). The Psychophysics Toolbox.Spatial Vision,10, 433–436.
Cavanagh, P., Anstis, S., &Mather, G. (1984). Screening for color blindness using optokinetic nystagmus.Investigative Ophthalmology & Visual Science,25, 463–466.
Cavanagh, P., Tyler, C. W., &Favreau, O. E. (1984). Perceived velocity of moving chromatic gratings.Journal of the Optical Society of America A,1, 893–899.
Chaudhuri, A., &Albright, T. D. (1990). A new technique for estimating chromatic isoluminance in humans and monkeys.Visual Neuroscience,5, 605–608.
Chaudhuri, A., &Albright, T. D. (1992). Heterochromatic fusion nystagmus: Its use in estimating chromatic equiluminance in humans and monkeys.Vision Research,32, 1745–1759.
Collin, C. A., &Chaudhuri, A. (1996). A maximum motion method for detection of red-green color deficiency [Abstract].Investigative Ophthalmology & Visual Science,37, 1062.
Collin, C. A., &Chaudhuri, A. (1998). A maximum motion technique for assessment of color vision defects.Perception & Psychophysics,60, 1337–1343.
Cornelissen, F. W., Peters, E. M., &Palmer, J. (2002). The Eyelink Toolbox: Eye tracking with MATLAB and the Psychophysics Toolbox.Behavior Research Methods, Instruments, & Computers,34, 613–617.
Kaiser, P. K. (1996). Measuring spectral sensitivity. InThe joy of visual perception: A Web book (chapter or section identifier). Available at http://www.yorku.ca/eye/brightne.htm.
Metha, A. B., Vingrys, A. J., &Badcock, D. R. (1993). Calibration of a color monitor for visualpsychophysics.Behavior Research Methods, Instruments. & Computers,25, 371–383.
Olds, E. S., Cowan, W. B., &Jolicœur, P. (1999). Effective color CRT calibration techniques for perception research.Journal of the Optical Society of America A,16, 1501–1505.
Pelli, D. G. (1997). The video toolbox software for visual psychophysics: Transforming numbers into movies.Spatial Vision,10, 437–442.
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This work was supported by a grant from the Fonds pour la Formation de Chercheurs et l’Aide à la Recherche to C.A.C.
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Collin, C.A., Chaudhuri, A. Using MATLAB with the Psychophysics Toolbox to present the heterochromatic fusion nystagmus stimulus. Behavior Research Methods, Instruments, & Computers 34, 500–508 (2002). https://doi.org/10.3758/BF03195479
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DOI: https://doi.org/10.3758/BF03195479