Home — PsychoPy®

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

PsychoPy^® is great for:

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.

bruce mars

Open science

Did you notice that everyone's sharing these days?

Richard Balog

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).