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Hi, Prof. LoCasto,<br>
<br>
I would accomplish your task with one list that has three other lists
nested in it. <br>
<br>
The master list would have 6 items in it and one column, perhaps named
ABC. Each of the 6 items would have its own nested ABC list, perhaps
named ABC1 through ABC6. Each of those nested lists would have three
items in it: the a, b, & c version of that number's data set.
Master list would choose the six items randomly; nested lists would
choose 1 item randomly. <br>
<br>
You want to make sure that each person gets 2 a's 2 b's 2 c's, &
Eprime's built-in counterbalancing does not work? What if you keep a
string, a character string, as an attribute that gets your List
Response added to it as you go, then check its contents with an in-line
object? You could write an If that would check to see whether the
object contains two a's, two b's, or two c's. If so, you could blank
out the items from the upcoming nested lists that you don't want--that
is, set their weight to 0 so that they can't be selected.<br>
<br>
Total control. You want something easy, though. Maybe something easier
than writing in-line code? Alas, when you want to do something a bit
different, something that is not out of the box, you have to write a
little in-line code. And it's very satisfying when you get the results
you want.<br>
<br>
Maybe someone else has an easier way?<br>
<br>
Leisha Wharfield<br>
Decision Research<br>
Eugene, Oregon, USA<br>
<br>
<br>
LoCasto, Paul C. Prof. wrote:<br>
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<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Hello all-<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">I see I might have been
unclear in my original post- I apologize.
I am aware of being able to create a number of lists- and for each list
counterbalance
stimuli manually i.e:<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">List 1= 1a, 2b, 3c, 4a,
5b, 6c,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">List 2= 1b, 2c, 3a, 4b,
5c, 6a<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">List 3= 1c, 2a, 3b, 4c,
5a, 6b<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">and then at the Block
level have E-prime choose to present
one of these lists using the counterbalance display option. However,
unless I
manufacture each possible list sequence this is really pseudorandom in
that
anyone who sees stimulus 1a, will also see stimulus 4a and 5b etc. <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Would someone be so kind
as to tell me how I might list my
stimuli in a way that has E-prime *<b><span style="font-weight: bold;">randomly</span></b>*
select whether a Ss sees version ‘a’, ‘b’, ‘c’
of a given stimulus and across the whole experiment would see an equal
number
of stimuli across the three conditions (a, b, c) where no stimulus
(e.g.
stimulus 1) was seen in more than one version (e.g. 1a *<b><span
style="font-weight: bold;">or</span></b>* 1b *<b><span
style="font-weight: bold;">or</span></b>*
1c). <o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">I would really appreciate
any insight you can afford.
Thanks.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Paul</span></font><o:p></o:p></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"><o:p> </o:p></span></font></p>
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