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<DIV><FONT size=2>Dear Eprime Experts,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I am currently now developing a stop-signal task with
a adaptive procedure. The targets are words and the stop-signal is a frame
around the word. The interval between the target onset and the stop-signal
should be dynamically adjusted to the subjects' performance after each stop
trial. I want to set the initial stop-signal delay to 250 ms after target onset.
I have created the Target (text) and stop-signal (image) in the same slide
object. How can I set a different onset for the image (stop-signal) in
the same slide object? I want the target to appear first and the stop-signal
(frame) 250 ms later. If this can be resolved, I think I could implement an
adaptive procedure, like this:</FONT></DIV>
<DIV><FONT size=2>Slide_image.OnsetTime = Slide_image.OnsetTime + 50 ms, if
subjects were able to stop their response</FONT></DIV>
<DIV><FONT size=2>Slide_image.OnsetTime = Slide_image.OnsetTime - 50 ms, if
subjects were unable to stop their response</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Can anyone help me?</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>best regards,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>M. Parra</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV></BODY></HTML>
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<DIV>---------------------------------------------------------------</DIV>
<DIV>Dipl.-Psych. Mauricio Parra<BR>Experimental Neuropsychological
Unit<BR>Department of Psychology<BR>Saarland University</DIV>
<DIV>Postfach 15 11 50<BR>66041 Saarbrücken<BR>Germany<BR>Tel.: +49 (681)
30258095<BR>Fax.: +49 (681) 3026516<BR>E-mail: <A
href="mailto:m.parra@mx.uni-saarland.de">m.parra@mx.uni-saarland.de</A><BR><A
href="http://www.neuro.psychologie.uni-saarland.de/">http://www.neuro.psychologie.uni-saarland.de/</A><BR></DIV></BODY></HTML>