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OpenSesame is a tool to create experiments for psychology, neuroscience, and experimental economics. The latest stable version is 3.0.3 Interactive Ising, released on Nov 26, 2015 (release notes).


  • A comprehensive graphical user interface – flexible and easy-to-use
  • Support for Python scripting – add the power of Python to your experiment
  • Support for external devices – use your eye tracker, button box, EEG equipment, etc.
  • Free and open source – released under the GPL3
  • Crossplatform – runs on Windows, Mac OS, Linux, and Android (runtime only)
Video 1. The step-by-step video tutorial shows how to create a complete experiment from scratch.

More downloads, tutorials, and forum

More downloads

Beginner tutorial

Advanced tutorial


Cite us

To cite OpenSesame in your work, please use the following reference:

Mathôt, S., Schreij, D., & Theeuwes, J. (2012). OpenSesame: An open-source, graphical experiment builder for the social sciences. Behavior Research Methods, 44(2), 314-324. doi:10.3758/s13428-011-0168-7