You need Psychopy (Peirce, 2007, 2009) to run the scripts of the experiments. PsychoPy is an open-source application allowing you run a wide range of neuroscience, psychology and psychophysics experiments. It’s a free, powerful alternative to Presentation™ or e-Prime™, written in Python (a free alternative to Matlab™ ). This open software can be downloaded from the Psychopy website. Please visit http://www.psychopy.org/ for further information.