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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