If you are using Windows, download the following installers and follow their instructions:
and, if needed:
Download the current Windows installer (.exe) from the Expyriment downloads site and execute it.
Do not start your experiments out of IDLE
If you are using the IDLE editor that comes with the Python installation, be aware that IDLE itself is written in Python. Starting your Expyriment programme out of IDLE (by clicking on “Run” or by pressing F5), might thus lead to improper timing!
We therefore strongly suggest to run Expyriment programmes from the command line if testing subjects.