Hi Hester,
It does sound like it should do it. There's a google group that seems
pretty active that might be better placed to help:
http://groups.google.com/group/e-prime
On 21/04/2010 09:21, Hester Duffy wrote:
> Hi Brian,
>
> Thanks for your reply.
>
> I guess what I'm hping for is a way of setting it so that the
> selection for the first participant is random, from the list of 360.
> The selection for the second participant is then random from the
> remaining 300, for the next is from the remaining 240, and so on,
> until the sixth is a randomly-ordered presentation of the last 60. For
> the seventh participant, the whole thing would reset, so it would be a
> random list of 60 from the original 360. E-prime allows you to set the
> selection method (random, in this case), the number of trials before
> exit (60) and the number of trials before resetting, which I thought
> would allow the structure outlined above, but apparently it's not
> doing what I want.
>
> I could create separate call lists, and if I can't figure out a better
> way to do it, I shall, but that's rather a labour-intensive and clunky
> way of doing it, and I can't help thinking that e-prime must, surely,
> be able to do what I want it to do? It seems reasonably basic!
>
>
> Cheers,
>
> H
>
> On Wed, Apr 21, 2010 at 3:14 PM, Brian K. Saxby<[log in to unmask]> wrote:
>
>> Hi Hester,
>>
>> I've dabbled with other programming but not used e-prime, so my comments are
>> general.
>>
>> If your aim is to present a random 60 out of your 360 stimuli, then you will
>> get duplicate presentations across subjects, but you have to hope with
>> enough subjects it will even out. If instead you are presenting
>> pre-determined blocks of 60 out of the fixed order list of 360, which I
>> think is what you're doing, you need to have something in the code to tell
>> the program where the start point is for the next subject (i.e. which block
>> is to be used) - is that what you're missing?
>>
>> Another possibility, and one that may not be the most elegant, is if you
>> know in advance which 60 stimuli represent each block, create 6 different
>> call lists, and switch out a new one for the previous one as you test each
>> subject. Or there may be a way to program which call list to use based on
>> subject number or some other identifier you enter.
>>
>> I hope that helps,
>>
>> Brian
>>
>>
>> On 21/04/2010 07:59, Hester Duffy wrote:
>>
>>> Hi all,
>>>
>>> I'm hoping someone might be able to give me some help with E-Prime.
>>> I'm setting up a study to rate the stimuli used in a couple of other
>>> studies. We have 360 stimuli in all, but I don't want to subject each
>>> participant to all 360; I want them each to rate 60, but I also want
>>> to make sure all of them get rated the same number of times. I thought
>>> I could do this by including all 360 in the call list in the E-Prime
>>> program, and telling it to reset after a full cycle of 360, but to
>>> exit after 60 samples. However, I've run it three times, and while it
>>> does exist after 60 samples, it seems to be resetting each time,
>>> rather than only after a full cycle; there are duplications in the
>>> lists used for the three participants. I did wonder if it resets when
>>> E-Prime is closed and then re-opened, but actually I ran two of them
>>> back-to-back without closing the program, and it still duplicated, so
>>> that's not the issue.
>>>
>>> Anyway, does anyone know how to do this? It must be possible, I'm just
>>> not sure which settings to tweak!
>>>
>>> Many thanks,
>>>
>>> H
>>>
>>>
>>
>>
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