SigmundAI.eu can now implement complete psychological experiments in #OpenSesame. From scratch based on verbal description. Astonishing how far #AI has come 😵‍💫 #psychology

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— Sebastiaan Mathôt (@cogsci.nl) Feb 23, 2026 at 3:56 PM

Release notes for 3.0.4

OpenSesame 3.0.4 is the fourth maintenance release in the 3.0 series. It fixes a crucial regression that was introduced in 3.0.3, which caused sketchpad items to ignore the file pool.

If you are upgrading from OpenSesame 2.9.7 or earlier, please see the list of important changes in OpenSesame 3.0:

Important changes in 3.0

Bugs fixed

Fix a regression where sketchpad items didn't use the file pool.

Windows packaging

OpenSesame 3.0.4
Python 2.7.10 (default, May 23 2015, 09:40:32) [MSC v.1500 32 bit (Intel)]
OpenCV is not available
OpenCV2 3.0.0
QProgedit 3.2.0
Expyriment  (Python 2.7.10)
IPython 3.2.0
NumPy 1.9.2
PIL is available (version is unknown)
PsychoPy 1.82.01
PyAudio 0.2.8
PyGame 1.9.1release
PyGaze 0.6.0a7
Pyglet 1.2.3
PyOpenGL 3.1.0
PyQt 4.11.4
PySerial 2.7
python-bidi 0.3.4
python-markdown 2.6.2
SciPy 0.15.1