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Psychopy

psychopy (source code) is experiment creation software. It provides both a graphical interface: "Builder" a la EPrime Task Presentation Software; and a python library: psychopy/“"Coder" a la MATLAB/Psychtoolbox.

As of 2026-07-07, 7T Terra.X uses version 2024.2.4. GUI built versions on e.g. 2026.2.0 have incompatible sound components. Design your experiment with the same version that will run it (2024.2.4).

Builder

Set keyboard interface to wait for = release. Also see Triggering Task Start and Log Task Start Time