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Hi Kelsey,<br>
<br>
You should be able to tell which trialproc a subject was in: if you
designate this in a top-level List it will appear as
Procedure[Block] in the .edat2 file.<br>
<br>
As you describe it, Group is redundant, possibly subject to user
error (if you mis-key Group it has no effect on the condition run)
and less informative than Procedure[Block] which has a descriptive
name rather than just values of 1/2. <br>
<br>
An alternative is to keep Group in your startup and use it rather
than Subject for counterbalancing.<br>
<br>
best,<br>
DavidV<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/09/2014 20:45, Kelsey A Brown
wrote:<br>
</div>
<blockquote
cite="mid:7819ea58-0208-464e-87b5-7d41d900cc8c@googlegroups.com"
type="cite">
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<div dir="ltr">
<div>Hello Everyone, </div>
<div><br>
</div>
<div>I just have a follow up question to my question above. I
was able to create the list for the two groups with pctcorrect
as an attribute following all of the steps David V and David
McFarlane provided; however, I have a brief question about
running the experiment with this setup. Will I be able to
determine which trialproc a subject was placed in
(highfrustrationproc or lowfrustrationproc) or is this
something I would have to designate beforehand? I figure with
the counterbalancing I wouldn't have to designate this, but I
would need to know which procedure each participant completed.
Also, in the experiment object properties startup information,
I have group checked where I can input either 1 or 2 to state
which condition the participant is assigned.Is this beginning
group step necessary if I have E-prime counterbalance subjects
into the two conditions using the list I created? I guess the
main question I am asking is if I can simple uncheck group in
the experiment object properties start-up information given
that I have counterbalanced the list of procedures? </div>
<div>Thanks, </div>
<div>Kelsey <br>
<br>
On Monday, September 8, 2014 5:27:08 PM UTC-4, Kelsey A Brown
wrote:
<blockquote class="gmail_quote" style="margin: 0;margin-left:
0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">
<div dir="ltr">Hello Everyone,
<div><br>
</div>
<div>I am trying to use E-prime to build a stop signal
frustration task, but I have encountered a few
complications in building the task. </div>
<div>At the moment, I am trying to create an initial
script that would allow E-prime to automatically run a
participant in a condition (high frustration or low
frustration) depending on the participant number that I
input before running the experiment. </div>
<div>So for example, if I wanted to run 80 participants,
half would be placed in the high frustration condition
and the other half would be placed in the low
frustration condition. </div>
<div><br>
</div>
<div>I have some ideas about how this could theoretically
be carried out, but I'm not sure if/how this can
actually be implemented in the script. For example, I
would want the initial script to begin by telling the
program to pull 40 random numbers 1-80 (I would need to
somehow make the same 40 numbers be pulled each time).
The 40 numbers pulled would be placed in the low
frustration condition where pctcorrect (percent
correct)=.80. </div>
<div>If else, (so if one of the other 40 numbers were
pulled), place the participant in a high frustration
condition where pctcorrect (percent correct)=.30. </div>
<div><br>
</div>
<div>e.g. If I were running the program and I typed in my
participant number as 3 and 3 was one of the random
numbers pulled between 1 and 80 then the program would
automatically run the stop signal task placing the
participant in the low frustration condition where
pctcorrect=.80 (where participants could accurately
inhibit on 80% of stop signal trials). </div>
<div><br>
</div>
<div>However, if the participant ID number was 8 and 8 was
not one of the 40 random numbers initially pulled
between 1 and 80 then the program would place the
participant in the high frustration condition where
pctcorrect=.30. </div>
<div><br>
</div>
<div><br>
</div>
<div>Is this something that is possible in E-prime? </div>
<div><br>
</div>
<div>I hope this makes sense. Thanks in advance for your
input! </div>
<div>-Kelsey </div>
<div><br>
</div>
</div>
</blockquote>
</div>
</div>
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<pre class="moz-signature" cols="72">--
David Vinson, Ph.D.
ESRC Research Fellow
Experimental Psychology
University College London
26 Bedford Way, London WC1H 0AP
Tel +44 (0)20 7679 5311 (UCL internal ext. 25311)</pre>
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