Millisecond Forums

The following script shows a 4 x 4 grid of smiling and frowning videos of faces. After about 30 to 35 trials the screen goes black and the task stops working. This happens on both Mac and PC that also have different processing power. We've tried adding a pretrial pause (5 second), but this did not change anything. We've also tried eight 3 x 3 grid and a task again crashes after 46 trials. It looks like the task gets overloaded by the video stimuli (at about 400+ presentation) and stops working. I am really at a loss as to what is going on and how to fix it, please help!

Also, I couldn't attach the .zip file as attachement - here is the dropbox link to the script and stimuli : https://www.dropbox.com/s/afq6hno2k7qk44w/VIDEO_MATRIX_TASK.zip?dl=0

Thanks in advance!
Stéphane