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 http://www.psychopy.org/developers/repository.html.

• travis-ci.org (master branch)

• coveralls.io (master branch)

• Homepage: http://www.psychopy.org
• Mailing list: https://groups.google.com/forum/?fromgroups#!forum/psychopy-users