synchronized trigger and stim presentation

[David Hairston]

I need to send a trigger signal denoting the exact time of stimulus
presentation (assuming parallel port is the easiest method).

Here is the problem/question - in the event of, say, a visual stimulus,
what is the best way to get these as close in sync as possible? I could
have an inline code sending the trigger directly prior to an
ImageDisplay... but then it wouldn't it at least have the delay
associated with waiting for the next screen update (could be up to 9ms
if 100hz monitor)?. Or - what about putting the inline right after said
presentation - would it actually occur immediately (like w/in a few ms)
afterwards?

Or - is there a way to do it with a Slide object?

Unfortunately, this will be very difficult to test out empirically...

 

W. David Hairston, Ph.D.

ANSIR Lab

Dept of Radiology

Wake Forest University School of Medicine

Medical Center Blvd

Winston-Salem NC 27157

(336) 716-7160 (Offiice)

(446) 716 0798 (Fax)

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.linguistlist.org/pipermail/eprime/attachments/20060619/26c622ff/attachment.htm>