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Last Commit
Jun. 22, 2018
Sep. 1, 2010


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PsychoPy is an open-source package for creating psychology stimuli in Python (A real and free alternative to Matlab). PsychoPy combines the graphical strengths of OpenGL with the easy Python syntax to give psychophysics a free and simple stimulus presentation and control package.

The goal is to provide, for the busy scientist (including me!), tools to control timing and windowing and a simple set of pre-packaged stimuli and methods. The code is platform independent, using Python and C libraries that are widely available.


To contribute, please fork the repository, hack in a feature branch, and send a pull request. For more, see and

More information

Latest Releases
Release 1.90.2
 May. 18 2018
Release 1.90.1
 Apr. 4 2018
Release 1.90.1
 Apr. 3 2018
Release 1.90.0
 Mar. 15 2018
Dev release 1 for 1.90 (testing only)
 Jan. 30 2018