Very slow image presentations - case 2422

[Redker]

I'm using directRT (w/ medialab) to present participants various stimuli (image files) within a conditioning procedure. I'm finding the presentation of the stimuli to be very sluggish...there are relatively long pauses in between presentations and sometimes certain images are flashed on the screen much too quickly.

I should mention that this same procedure (with same .csv files, etc.) worked fine in previous experiments a couple years ago using different computers (with an older Windows OS and I believe previous versions of directRT/medialab). I'm now using brand new machines with, presumably, the newest version of Windows and empirisoft software installed on them.

Incidentally, a colleague of mine recently tried to run an IAT that I created (and used with other computers with older OS and previous versions of directRT/medialab) in the past and she reported that the presentation of the stimuli was also VERY slow.

I hope you can assist me with this...

thanks for your time