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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.

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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).

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Beginner tutorial

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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