PsychoPy is an open-source package for creating experiments in behavioral science. It aims to provide a single package that is:
- precise enough for psychophysics
- easy enough for teaching
- flexible enough for everything else
- able to run experiments in a local Python script or online in JavaScript
To meet these goals PsychoPy provides a choice of interface - you can use a simple graphical user interface called Builder, or write your experiments in Python code. The entire application and library are written in Python and is platform independent.
There is a range of documentation at:
To contribute, please fork the repository, hack in a feature branch, and send a pull request. For more, see CONTRIBUTING.md and the developers documentation at https://www.psychopy.org/developers
Dev branch: 
Release branch: 
- Homepage: https://www.psychopy.org
- Forum: https://discourse.psychopy.org
- Issue tracker: https://github.com/psychopy/psychopy/issues
- Changelog: https://www.psychopy.org/changelog.html