PsychoPy logo
Developer(s)Jonathan Peirce
Initial release2003
Stable release
2021.1.4 / 15 April 2021; 15 months ago (2021-04-15)[1]
Written inPython
Operating systemCross-platform
LicenseGNU GPL v3+ Edit this on Wikidata

PsychoPy is an open source software package written in the Python programming language primarily for use in neuroscience and experimental psychology research.[2][3] Developed initially as a Python library and then as an application with a graphical interface, it now also supports JavaScript outputs to run studies online and on mobile devices. Unlike most packages, it provides users with a choice of interface - they can generate experiments by writing Python scripts, use a graphical interface that will generate a script for them, or combine both methods. Its platform independence is achieved through use of the wxPython widget library for the application and OpenGL for graphics calls. It is also capable of generating and delivering auditory stimuli.

The project was initially supported only by volunteer code and forum contributions alongside grants from The Royal Society, The University of Nottingham, Wellcome Trust, and BBSRC project.[3] A 2018 grant from the Wellcome Trust allowed for hiring of a full-time staff.[4]

According to its usage statistics page, Psychopy was launched on more than 20,000 different computers in November, 2018, and has gained relative usage by month every year since its initial release in 2003.[5]

History and versions

PsychoPy is continually updated with 5-10 releases each year, containing new features and bug fixes. Here are some major releases in the history of PsychoPy:

Key people

A large number of people have contributed to the project over the years, in terms of code,[8] but also by supporting users on the community forum.[9] A few of the major contributors are listed below:


  1. ^ "Releases · psychopy/psychopy". Retrieved 2021-04-26.
  2. ^ Peirce JW (May 2007). "PsychoPy--Psychophysics software in Python". Journal of Neuroscience Methods. 162 (1–2): 8–13. doi:10.1016/j.jneumeth.2006.11.017. PMC 2018741. PMID 17254636. open access
  3. ^ a b Peirce JW (15 January 2009). "Generating Stimuli for Neuroscience Using PsychoPy". Frontiers in Neuroinformatics. 2: 10. doi:10.3389/neuro.11.010.2008. PMC 2636899. PMID 19198666. open access
  4. ^ "Wellcome Trust funding: PsychoPy is going properly online!". PsychoPy. 2017-07-26. Retrieved 2019-10-03.
  5. ^ a b Peirce JW. "PsychoPy usage". Open Science Tools Ltd. Retrieved 26 July 2019.
  6. ^ "360Giving GrantNav". Retrieved 2019-07-26.
  7. ^ "Changelog — PsychoPy v3.1". Retrieved 2019-07-26.
  8. ^ "PsychoPy contributors".
  9. ^ "PsychoPy forum".