- Latest version, PsychoPy 2022.2, with Camera Component, Gratings/Gabors online, and "The Shelf"! DOWNLOAD now
- NEW EDITION of the official book, with new chapter on running online: Building Experiments in PsychoPy Ed2
- Is your software timing as good as PsychoPy®? See detailed comparisons with other software in our timing mega-study
- Please try to cite the most up-to-date paper: Peirce, Gray, Simpson et al (2019)
- Lots of helpful tutorials on youtube! Click here to see
PsychoPy® is a free cross-platform package allowing you to run a wide range of experiments in the behavioral sciences (neuroscience, psychology, psychophysics, linguistics...)
This is a community project. Users have all the source code. Users are the developers. Users support each other.
Alongside open-source, we're strong supporters of Open Science, and we'll try to encourage and facilitate that wherever we can!
Easy enough for teaching
Universities all over the world are using PsychoPy® for teaching students about experiments
- Flexible and intuitive Builder interface to create huge range of studies
- Textbook(s) suitable for both undergraduate and professional audiences
- Many further resources for learning and teaching, including Youtube tutorials, online tutorials and workshops.
- The Pavlovia repository of shared experiments accessible directly from the application (requires PsychoPy®) to search for and share your studies.
Precise enough for psychophysics
Hardware accelerated graphics, best-in class timing, and calibration tools built in
- Fantastic timing precision (see the timing mega-study for comparisons)!
- Time and update your stimulus on every screen refresh!
- Tools to help monitor calibration and wide range of units
- Hardware-accelerated graphics for stimuli that can be updated on the fly
- Access to button boxes when you need the utmost precision
- Automated logging for you to what happened and when
- OpenGL (and shaders) ready for use when you low-level access to graphics
Flexible enough for everything else
- Dynamic, interactive studies: Free yourself from simple static stimuli! You can update your stimulus interactively on every screen refresh!
- Neuroimaging: Send and receive triggers to your hardware at precise times
- Eye-tracking: Access to wide range of hardware (eye trackers, button boxes, trigger systems...)
Online
Want to run your study on the web, so users can access it anywhere?
PsychoPy® added the facility to run studies online using a high-performance, hardware-accelerated, port of the PsychoPy Python library.
- Export your experiment from Builder to a web page
- PsychoPy® is the only package with reaction time precision under 4 ms online!
- Update your stimulus on every frame, just like in the desktop!
- Upload that to Pavlovia.org (with easy tools built into the PsychoPy app)
- Give participants your URL and run your study in the browser!
- You can recruit participants using Sona, Prolific, Mechanical Turk or similar systems.
Open science
Did you notice that everyone's sharing these days?
- PsychoPy® was written by scientists for scientists
- You have all the source code. If you want something added or changed you can go ahead and make that change!
- Over 100 contributors have made changes (small or large) and fed them back to the project for others to benefit!
- You can share your study on Pavlovia.org and that means more people might be tempted to base their work on yours (which means more people talking about your work).