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About PsychoPy

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PsychoPy is an open-source application allowing you run a wide range of neuroscience, psychology and psychophysics experiments. It’s a free, powerful alternative to Presentation™ or e-Prime™, written in Python (a free alternative to Matlab™ ).

PsychoPy provides a unique choice of interface: use the Builder interface to build rich, flexible experiments easily or use the Coder interface to write extremely powerful experiments in the widely-used Python programming language. The best of both worlds!


PsychoPy is going Professional and Online!

We’re delighted to announce that The Wellcome Trust has granted us a sum of money that will allow us to hire a full-time developer, meaning that we will become more professional than ever and, critically, also funding for Ilixa Ltd. to complete the job of building the online experiment system that many of you have been waiting for! See the discourse post for further details of what we’re planning.

Latest version: 1.90.1 was released April 2018.

This version supports Python3 and Python2 (although some hardware may not work on both).

See the full Changelog