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Last Commit
Dec. 15, 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
Beta 13 of PsychoPy3.0.0
 Dec. 14 2018
Beta 12 of PsychoPy 3.0.0
 Nov. 29 2018
Beta 11 of PsychoPy 3.0.0
 Oct. 12 2018
PsychoPy3 Beta10
 Sep. 21 2018
PsychoPy3 Beta9
 Aug. 31 2018