Psychtoolbox-3

Psychophysics Toolbox Version 3 (PTB-3) is an open-source set of Matlab and GNU Octave functions for vision and neuroscience research. It makes it easy to synthesize and show accurately controlled visual and auditory stimuli and interact with the observer. Some of its functionality is available as part of Python toolkits like PsychoPy. For licenses, commercial support and services visit psychtoolbox.net. Follow us on Mastodon, BlueSky, or Twitter @psychtoolbox

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Stopwatch

>Psychtoolbox>PsychOneliners

Stopwatch

Time intervals.

Press down the shift key to start the stopwatch. Release it to stop.
Use command-period (i.e. apple and period keys) to quit.

Path   Retrieve current version from GitHub | View changelog
Psychtoolbox/PsychOneliners/Stopwatch.m

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Last updated on July 11, 2025