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<DIV>Hi All,</DIV>
<DIV> </DIV>
<DIV>I have a few questions:</DIV>
<DIV> </DIV>
<DIV>Does anyone know anything about contingent branching (see page 160 in
E-Prime User's Guide)?</DIV>
<DIV>I have a set-up where in the first part of the task, participants have 3
response options (1, 2 or 3). According to which one they select, the task
then proceeds to one of three lists. I am using the following script after
the first trialproc:</DIV>
<DIV> </DIV>
<DIV>If Allbuttons.RESP = "1" Then</DIV>
<DIV> List1.Run</DIV>
<DIV>ElseIf Allbuttons.RESP = "2" Then <BR> List2.Run</DIV>
<DIV>Else List3.Run</DIV>
<DIV>End If<BR></DIV>
<DIV>The problem is that I am getting an error message when I try to run it:
"Factor error: Invalid context in list 1" (or list 2, or list 3, according to
which response I make on the first part of the experiment). I'm not really
sure what that error message means? When I delete my script, the whole
thing works fine (it's just that then I get the three possible lists run
sequentially). Perhaps I have not set-up the different levels of the task
correctly - should the first part, and then the script, and then the three
lists, all come on the same timeline in the first trialproc?</DIV>
<DIV> </DIV>
<DIV>My next question follows from this: once participants have completed either
list1, 2 or 3, I then need the task to go back to the first screen (where they
have the three response options).</DIV>
<DIV> </DIV>
<DIV>I would like to set up a counter on the screen that will continuously
display cumulatively how many 'points' the participant has. Any tips on
how to get started on this?</DIV>
<DIV> </DIV>
<DIV>Finally, I need to set up something that will enable me to deduct points
from the participant at predetermined intervals (probably on a variable ratio
schedule).</DIV>
<DIV> </DIV>
<DIV>Any help on any or all of these issues would be much appreciated!</DIV>
<DIV>Thanks very much,</DIV>
<DIV>Catherine Ortner</DIV>
<DIV> </DIV>
<DIV>************************<BR>Catherine N M Ortner<BR>Doctoral
Candidate<BR>Department of Psychology<BR>University of Toronto<BR>100 St George
Street<BR>Toronto, Ontario<BR>M5S 3G3</DIV>
<DIV> </DIV>
<DIV>Tel: 416 978 5464</DIV></BODY></HTML>