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

Copyright, 2010-2024, Sebastiaan Mathôt and contributors.

https://osdoc.cogsci.nl/

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

• A user-friendly interface — a modern, professional, and easy-to-use graphical interface
• Online experiments — run your experiment in a browser with OSWeb
• Python — add the power of Python to your experiment
• JavaScript — add the power of JavaScript to your experiment
• Use your devices — use your eye tracker, button box, EEG equipment, and more.
• Free — released under the GPL3
• Crossplatform — Windows, Mac OS, and Linux

OpenSesame relies on a number repositories that are all hosted by the Cogsci.nl organization on GitHub. The most important of these are:

• opensesame contains core OpenSesame functionality
• rapunzel is a set of extensions that turn OpenSesame into a code editor
• osweb implements OSWeb, the online OpenSesame runtime
• opensesame-extension-osweb embeds OSWeb into the OpenSesame user interface
• pyqode.core implements generic code-editor widgets
• pyqode.python implements Python-specific code-editor widgets
• datamatrix implements a tabular data structure that is used by the loop item
• qdatamatrix implements a Qt widget for editing datamatrix objects
• pseudorandom implements pseudorandomization/ randomization constraints

Each major version of OpenSesame lives in its own branch. The default branch is currently milgram.

• gibson - 2.8
• heisenberg - 2.9
• ising - 3.0
• james - 3.1
• koffka - 3.2
• loewenfeld - 3.3
• milgram - 4.0

• 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
• Mathôt, S., & March, J. (2022). Conducting linguistic experiments online with OpenSesame and OSWeb. Language Learning. doi:10.1111/lang.12509

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:

• https://www.gnu.org/licenses/gpl.txt

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 ...

• https://osdoc.cogsci.nl/

... which is itself also hosted on GitHub:

• https://github.com/smathot/osdoc