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A random dot kinematogram for online visual psychophysics

Sivananda Rajananda, Hakwan Lau, Brian Odegaard
doi: https://doi.org/10.1101/192377
Sivananda Rajananda
1 University of California-Los Angeles
Roles: Designed software; coded software; tested software; uploaded software to GitHub & CodePen;
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Hakwan Lau
2 University of California-Los Angeles; Brain Research Institute (UCLA); Hong Kong University
Roles: Designed software
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Brian Odegaard
3 University of California-Los Angeles
Roles: Designed software; proofread code; tested software
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Abstract

Online experiments using visual stimuli have become increasingly common in recent years, but many frequently-used stimuli in visual psychophysical experiments have yet to be developed for web-based platforms. Here, we introduce the first open-access random-dot kinematogram (RDK) for use in web browsers. This fully-customizable RDK offers options to implement several different types of noise (random position, random walk, random direction) and parameters to control aperture shape, coherence level, the number of dots, and many other features. We include links to commented JavaScript code for easy implementation in online experiments, as well as an example of how this stimulus can be integrated as a plugin with an online experimental library (jsPsych).

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted September 21, 2017.
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A random dot kinematogram for online visual psychophysics
Sivananda Rajananda, Hakwan Lau, Brian Odegaard
bioRxiv 192377; doi: https://doi.org/10.1101/192377
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A random dot kinematogram for online visual psychophysics
Sivananda Rajananda, Hakwan Lau, Brian Odegaard
bioRxiv 192377; doi: https://doi.org/10.1101/192377

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