picture show

[Matthijs Vink]

Dear all,

We are trying to present a lot of pictures. Each picture is
presented on the screen for 5 secs, followed by another picture of a
buttonbox. Subjects can respond only when the buttonbox is
presented.
We have approx. 140 images (1024*768*256), which is almost
100Mb. The first couple of images are presented correctly, while
later images stay on the screen for more than 5 secs.
We run the Eprime prog on a PIII 500 MHz, 128 Mb mem. What is
the best way to present the pictures without slowing down after a
while.

Another question:
We want to trigger the  experiment with our MRI scanner, and also
collect responses with a buttonbox. Both signals enter the cpu
through the serial port. Is it possible to make a slide (or whatever)
which allows for the collection of a buttonbox response and which
terminates after a trigger signal?

Thanks in advance,

Matthijs

Matthijs Vink
Functional Imaging
Dept. Psychiatry
University Medical Center
Room A.01.126
Heidelberglaan 100
3584 CX Utrecht
The Netherlands
tel. (31) 30 250 7121 (work)
tel. (31) 30 250 8352 (work)
tel. (31) 30 231 0171 (home)
www.fMRI.nl