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dev-scripts Further updates to translation framework Feb 9, 2016
installers Add conda environment files Jul 28, 2018
libopensesame Bump to 3.2.5 Jul 27, 2018
libqtopensesame oslogging: start logging in opensesamerun Jul 25, 2018
mime icon: add border to opensesame svg icon May 1, 2016
openexp canvas: preserver drawing order in legacy backend Jul 19, 2018
opensesame_extensions delete check_file_pool extension Jul 18, 2018
opensesame_plugins oslogging: replace debug.msg() by oslogger Jun 18, 2018
opensesame_resources translation: fix jp_JP Jun 18, 2018
opensesame_unittest Update headless Oct 17, 2017
.gitattributes Updated to 0.23 Mar 26, 2011
.travis.yml travis: downgrade broken psychopy Jan 29, 2018
COPYING Add correct COPYING Dec 8, 2012 setup: include missing files Sep 28, 2016
copyright Update setup for stdeb Mar 27, 2016
opensesame Even better setup of main file Apr 6, 2016 Fix Android building Jan 20, 2017
opensesamerun setup: use entry-point like structure. Mar 25, 2016
qt.conf Changes to work with py2app Mar 25, 2013 Fix links and references to 3.1 Jan 15, 2018 travis: add unittests script Oct 3, 2015 Bump to 3.1.7 Jul 6, 2017
setup-mac-nodeappdmg.json Update Mac OS build scripts for 3.0.7 Mar 16, 2016 Fixes to notifications, resource localization and setup script Jul 7, 2016
setup.cfg Update setup Mar 25, 2016 setup: add new packages Oct 17, 2017 delete check_file_pool extension Jul 18, 2018
stdeb.cfg stdeb: add shapely as recommends Jul 19, 2018 translation: preserve message encoding Nov 30, 2017


OpenSesame is a tool to create experiments for psychology, neuroscience, and experimental economics.

Copyright, 2010-2017, Sebastiaan Mathôt and contributors.

Build Status


  • 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)


Each major version of OpenSesame lives in its own branch. The master branch contains the latest stable version.

  • gibson - 2.8
  • heisenberg - 2.9
  • ising - 3.0
  • james - 3.1
  • kuhn - 3.2


OpenSesame is a graphical experiment builder. OpenSesame provides an easy to use, point-and-click interface for creating psychological/ neuroscientific experiments.


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


If you wish to contribute to OpenSesame (and you are welcome to!), please visit:


OpenSesame is distributed under the terms of the GNU General Public License 3. The full license should be included in the file COPYING, or can be obtained from:

OpenSesame contains works of others. For the full license information, please refer to debian/copyright.


Installation instructions and documentation are available on the documentation website ...

... which is itself also hosted on GitHub: