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OpenSesame 3.0.0 will bring amazing new features! Curious? Take it for a test spin, and help us iron out the kinks.



Welcome to the OpenSesame documentation area! Here you can find everything you always wanted to know about your favorite free and cross-platform experiment builder. The latest stable version of OpenSesame is 2.9.7 Hesitant Heisenberg, released on Aug 6, 2015 (release notes).

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