Dear Cedrus –
I am experiencing an odd delay between the reset of the RT timer and the beginning of the onset of an audio file (.wav)
I have an audio stimulus sound file of a metronomic click, the beginning of which is triggered by “any correct” subject response from a previous event. I previously had been running the experiment on a MacBook Pro Core Duo (OS 10.6.3) with no problems.
Due to catastrophic computer/coffee/gravity failure, I have had to change computers to a MacBook Pro i5 (OS 10.6.3). The experiment has not changed, but the audio file has begun playing about 300ms after the timer starts running, giving me very skewed results.
Do you have any insight as to why this might be going on?
To make matters more confusing, this doesn’t seem to happen every time. Sometimes a reset will fix things, or a safe boot, or a repairing of permissions. It always seems to recur.