Four conditions - One pool of stimuli

[Emmet]

Hi Liwenna,

Thanks for the advice- emptying the procedure column worked and I am
now able to show more than one slide per each condition of my
experiment. This has created another problem for me because now I can
only seem to get text into my slides. I used text just to get the
design up and running but now when I enter a filename into the
Stimulus attribute of my nested list, it enters the text of the
filename rather than referencing the file itself. I can get my picture
up but only if I insert it directly into the slide object. But I can't
do that because I have 125 of them to exhibit! I'm getting for antsy
about my project now, deadlines and this eprime business has consumed
my life!

many many thanks,

Emmet

On Jun 24, 11:15 am, liwenna <liwe... at gmail.com> wrote:
> and what happens if you, in the new nested list, remove whatever is
> entered in the collumn 'procedure' ?
>
> On Jun 23, 3:26 pm, Emmet <emmet.c.cla... at gmail.com> wrote:
>
>
>
> > Hi David,
>
> > Thank you for your response- it was spot on. I also had a response
> > emailed to me from another member, so thank you too! I understand what
> > you are telling me although I am having one operational problem with
> > it:
>
> > >You can do this very easily
> > > with a nested List.  Just put all your stimuli in their own nested
> > > List, say, StimList.
>
> > So I have my nested list which I have called Stimlist and I currently,
> > for practice reasons, have one level which samples perfectly from my
> > slide object. Now when I add in a second level with another stimulus I
> > get this error message:
>
> > "Run-time Error (Line 295) -999: Factor Error:
> > Can't find procedure definition"
>
> > So it runs through fine until I add a second level to my nested list.
> > Considering I need 125 levels (pictures) to enter into this list, I am
> > slighty worries. I have been reading other topics and have seen that
> > perhaps I should enter all 125 pictures into one Level?
>
> > many thanks in advance,
>
> > Emmet
>
> > University of York
>
> > On Jun 16, 7:39 pm, David McFarlane <mcfar... at msu.edu> wrote:
>
> > > Emmet,
>
> > > 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 -- 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...
>
> > > Not sure that I follow your question, so I will answer one that I
> > > can.  Suppose you have a pool of 125 stimuli and, *within any one
> > > session*, you want to sample 25 at a time randomly without
> > > replacement (i.e., no stimulus reused either within any sample of 25
> > > nor until all 125 stimuli are sampled).  You can do this very easily
> > > with a nested List.  Just put all your stimuli in their own nested
> > > List, say, StimList.  Set that List to Random.  Now, in any other
> > > List where you want to use stimuli from StimList, simply add StimList
> > > in the Nested column, and then use the attributes from StimList just
> > > as you normally would.  You can have one main List take 25 samples
> > > from StimList, and later take another 25 samples, and it will pick up
> > > right where it left off.  IOW, E-Prime essentially shuffles all 125
> > > stimuli, and then "draws" from that shuffled List until the List is
> > > exhausted, and then reshuffles the List and starts over.  Or, you can
> > > get other effects by changing settings under the List Reset/Exit tab.
>
> > > In general, just think of Lists (whether nested or not) as decks of
> > > playing cards, that's how I have come to understand them.  Think of
> > > nested Lists as just additional, separate decks of cards that get
> > > drawn from whenever you draw a row from a main List that names a
> > > nested List.  I have written about this elsewhere, if you search
> > > around you may find my earlier posts here or on the PST Forum, but
> > > here is another attempt...
>
> > > So, each "card" (row) in any "deck" (List) has some attribute values
> > > written on it; some of those may be the names of other decks (nested
> > > Lists) to draw from.  So, you start by shuffling all these decks as
> > > needed.  Then you draw a card from a "main" deck, and read off the
> > > attribute values written on it.  If any of these names another deck,
> > > you draw a card from those decks and read off those attribute values;
> > > once again, if any of these names another deck then you draw from
> > > that deck, etc.  When you are done you will have a set of attribute
> > > values to work with for that trial.  At the end of the trial you put
> > > all the cards that you drew onto a discard pile for each deck, and
> > > then draw new cards.  Whenever you exhaust any deck, you pick up its
> > > discard pile, reshuffle that deck as needed, and carry on.
>
> > > It gets a little more complicated than this because you can modify
> > > this behavior by changing the settings under the List Reset/Exit tab,
> > > but this is a pretty good first approximation.
>
> > > Now, if you want samples of 25 to take place *across* separate
> > > sessions, well, that is an entirely different and more complex
> > > matter.  Could be done, but no sense trying to explain that now.
>
> > > -- 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)
>
> > > At 6/14/2011 12:18 PM Tuesday, you wrote:
>
> > > >Hi all,
>
> > > >I have battled through the entire user guide and I am definitely
> > > >getting places with my E Prime project but I have one sticking point I
> > > >hope you can help me with. I have a within-groups design withfour
> > > >groups (and one practice condition) and each condition will receive 25
> > > >picture slides. I think that my answer may lie within the nested lists
> > > >option but I'm struggling to a find a way to have each of the
> > > >conditionsrandomly sample (without replacement) their 25 pictures
> > > >from the same 125 picture list so that, in effect, each participant,
> > > >regardless of the counterbalancing ofconditionshas a unique ordering
> > > >of the stimuli from start through finish.
>
> > > >Please let me know if I have not explained myself clearly or if you
> > > >would like me to post up a screenshot or something (can I do that?)
>
> > > >many thanks in advance,
>
> > > >Emmet Clarke
>
> > > >University of York- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

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