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OpenSesame - 0.27

Sebastiaan Mathot (smathot)



OpenSesame is a graphical experiment builder. OpenSesame provides an easy to use, point-and-click interface for creating psychological experiments. In addition to a powerful sketchpad for creating visual stimuli, OpenSesame features a sampler and synthesizer for sound playback. For more complex tasks, OpenSesame supports Python scripting using the built-in editor with syntax highlighting.


OpenSesame is a graphical, open-source experiment builder for the social sciences. It sports a modern and intuitive user interface that allows you to build complex experiments with a minimum of effort. With OpenSesame you can create a wide range of experiments: Psychophysics, reaction time tasks, and questionnaires, to name but a few. The plug-in framework and Python scripting allow you to incorporate external devices, such as eye trackers, response boxes, and parallel port devices, into your experiment. OpenSesame is freely available under the General Public Licence. Release notes ------------- OpenSesame 0.27 is almost completely backwards compatible with previous versions, expect for the following differences: - canvas.keyboard.get_key() now returns a key as unicode, rather than as an int corresponding to an ASCII value. This change has been made to improve support for non-QWERTY keyboard layouts. - Response timeouts are now registered as None, rather than the string ‘timeout’. - In the Windows release, the media_player plug-in has been replaced in favour of the media_player_vlc plug-in. This was necessary, because the libraries used by the old media_player are not compatible with Python 2.7. Notable changes: - Added Expyriment backend - Added form functionality - Improved Unicode support - Improved internationalization - Added quick run button - Add ecological alternative to S&V template - Numerous bug-fixes - Improved compatibility with Nexus 7 tablet


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OpenSesame - 0.27 - Dec 13, 2012
OpenSesame - 0.26 - Apr 2, 2012
OpenSesame - 0.25 - Nov 12, 2011
OpenSesame - 0.24 - Jul 18, 2011
OpenSesame - 0.23 - Mar 25, 2011
OpenSesame - 0.22 - Jan 31, 2011 account Comments

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April 22, 2012 12:37am - Zachariah Callaway - nickname: (xzcallaway)
A .deb package of OpenSesame is available for download at
February 15, 2011 4:45am - Sebastiaan Mathot - nickname: (smathot)
Hi dfpena,

Thanks! On the contrary, you are encouraged to modify and extend it. Perhaps you could let me know of any changes that you've made so that I can perhaps use them?

Kindest regards,
February 2, 2011 6:24am - David Pena - nickname: (dfpena) - 5/5
This is the best experiment program I have come across!! Would it bother you (ethically) if I extended this to include neuroscience experimental scripts. I do animal research.

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