Complex (for me) randomization

[ccbaye]

Dear David,

Thank you for your effort. Now I can give you my solemn word that I
have been through all the exercices :). I had the idea to change the
weights in the male face and female faces lists, in hoping that the
chosen stim would be repeated the number of time I set the weight..but
it did not work either. I hope that it is easy and that I am just too
dumb to figure it out. I sent the problem also to the PST staff, but I
would need an answer quickly, and I was terrified at the idea to wait
up to 10 days to get an answer..So..please, as you think it is so
simple, I would be very grateful to you if you could provide me with a
hint.

Best,
Christophe.

On May 19, 12:49 am, David McFarlane <mcfar... at msu.edu> wrote:
> Christophe,
>
> Stock reminder:  1) I do not work for PST.  2) PST's trained staff
> takes any and all questions athttp://support.pstnet.com/e%2Dprime/support/login.asp, and they
> strive to respond to all requests in 24-48 hours (although latest
> reports indicate more like 10 days) -- this is pretty much their
> substitute for proper documentation, so make full use of it.  3) If
> you do get an answer from PST Web Support, please extend the courtesy
> of posting their reply back here for the sake of others.
>
> That said, here is my take ...
>
> This all seems rather simple to me, but perhaps I am missing
> something.  So before I expend any more effort, I need your solemn
> word that you have already worked completely through *all* of the
> exercises in *both* the Getting Started Guide and the User's Guide
> that came with E-Prime.  Or just wait a bit and some more
> understanding soul here may just jump in and answer you.
>
> -- David McFarlane, Professional Faultfinder
> "For a successful technology, reality must take precedence over
> public relations, for nature cannot be fooled."  (Richard Feynman,
> Nobel prize-winning physicist)
>
>
>
> >Thank you for your help! I didn't figure out the problem by myself.
>
> >I have a problem with a complex randomization. I would like my prog to
> >pick out randomly without replacement a stim from a list of different
> >male faces or different female faces at the block level, and than
> >conserve this chosen stim all along the individual trials bound to
> >this block. And so on for the successive blocks. Ultimately for each
> >block, participants would have to rate a face (the chosen stim) on
> >different scales (random presentation order without replacement);
> >before pursuing to the next block: rating of another face with the
> >same scales; etc.
>
> >I used some nested lists,  But, until now, my prog selects another
> >stim from the female or male faces list for each new trial. This is
> >not what I want: I want that the stim chosen once at the block level,
> >is used again and again for all the trials bound to this block. When
> >this block of trials is over, the prog should start the second block
> >and choose another face from the remaining stim of the face list, and
> >this face should again be used again and again for all block trials,
> >and so on. I can't attach the prog and the stims, but if someone was
> >to help me, I could send it.
>
> >Best,
> >Christophe
>
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