I am currently working on an experiment that occasionally slows and/or Afreezes (or registers as “not responding”) in the midst of the experiment. Occasionally, stimulus that should remain on the screen a max of 2s remains 10-15 seconds. Subsequent stimuli are presented too quickly.
It is not consistent, and I cannot find any pattern to the freezing (i.e. it does not work better the first loading as in http://community.cedrus.com/showthread.php?t=540&highlight=freezing ). When it freezes, pressing ‘esc’ seems to do nothing.
-The experiment consists of 3 blocks of 500 visual stimuli (taken from 3 stimulus lists). Stimuli are .jpg files, between 40-65kb. Participant response is recorded via SV1 voice key attached by serial port.
-The computer (I have tried on several in my lab) has approx 123GB of free space and 3GB of RAM. The PC runs Windows XP Pro 5.1.
-I am running the latest Superlab Version (4.5)
-Under options, I have selected to load files trial by trial.
Does anyone have any suggestions? Can anyone think of something I am missing? Any help would be much appreciated!
p.s. The only pattern I see is that I struggle to replicate the freeze by myself, but it appears when i have participants in the lab!