[solved] Double-press issue on Mac
Our lab is running an experiment for which we are measuring reaction time after a participant's key-press to stimuli. The response is a single key-press that is supposed to trigger the next trial, but on some trials it's requiring two key-presses instead of one which interferes with our reaction time data. However, it only seems to be a problem on our Mac computer and not our PC. We run the same script on both computers, so this shouldn't be happening. We have all duration times set correctly, so we can't figure out why it does this. We have the 27.2 program on both the Mac and the PC.
Our experiment is structured so that we have a sketchpad presenting a stimulus for 300ms followed by a blank sketchpad whose duration is set to zero (this is the response window), and then a keyboard response icon with duration set to 8000. Again, the program is correctly logging RT and accuracy for most of the trials, and the error is not linked to a specific trial type. And again, the identical script works just fine on the PC. If you could help, that would be great. Thanks.