Psychtoolbox Path Check

The ptb_path_check.m file included here can be used to confirm Matlab will use the intended version of Psychtoolbox for your experiment.

Ensure that PTB is installed, this function is in the path, and, at the start of your stimulus script, include a line like:

ptb = ptb_path_check('/Users/Shared/toolboxes/PTB_3012/Psychtoolbox')