On one slide, show different images, loaded from a list

[Vera]

Hi Liwenna,

thanks for the very long post. I am going to try and implement this
tomorrow (I worked all day with an IT-specialist today, trying to
"code" around the problem) but in the end everything actually even got
worse and we didn't find any solution really) so that this evening
(well, for what is left of my evening) I will let E-Prime be E-Prime
and do something else (watching some brain-dead-thing on the TV sounds
like a perfect idea!!!) before my head explodes! I will look into your
solution tomorrow though (or else this weekend, as tomorrow I will
have to make sure that my "pictures-solution" works more or less so we
can make a quick pilot study next week).

Thanks a lot though for the effort and know that I will study your
lines intensively when I get the opportunity (I am very unhappy with
the generated-images solution we are going to use now).

Greetings, Vera

On Mar 11, 1:51 pm, liwenna <liwe... at gmail.com> wrote:
> oops... in the comments inbetween the code quite some *'s are
> missing...
>
> for instance in this comment:
> *tell eprime to repeat the following code up to 'next m' 9 times, with
> m = 1, m=2, m=3 etc, m is levelnumber of the triallist that is to be
> filled.
> for m = 1-9
>
> lines 2 and 3 could use a * and only line 4 is actual code. But I
> guess you can figure it out.
>
> On Mar 11, 1:49 pm, liwenna <liwe... at gmail.com> wrote:
>
> > Hey Vera,
>
> > I couldn't let go and I kinda overdid it a bit but here is an
> > extensive post that I think should help you out.
>
> > What you do want to control is the number of times the target appears
> > at each location. You have nine locations, so you make 9 levels in
> > your triallist and create all the combinations of targetstimulus and
> > targetlocations (x and y values) in that list (attributenames:
> > targetstim for the picturename, targetx and targety). In this list you
> > also create the attribute for the 8 distractorstimpictures (disstim1,
> > disstim2 etc) but not fill these cells. Once the x and y of the target
> > are defined the distractorstimuli automatically should get the other 8
> > x and y values so also create attributes for the x and y values of the
> > distractors in this list (dis1x, dis1y, dis2x, dis2y etc.) and fill
> > them with the remaining 8 x and y values for each level. Now you can
> > have 9 imageobjects in your slide that refer to [targetstim],
> > [disstim1], [disstim2] etc. and also to the x and  y values for each
> > stim in the list: [targetx] [targety], [dis1x], [dis1y], [dis2x] etc.
>
> > The only cells not filled yet are the cells that define the
> > picturenames of the distractorstimuli (disstim1, distim2 etc in your
> > triallist). These cells can be filled by adjusting the code referred
> > to above from a random array. Something like the below thing should
> > work (didn't test this one out in e-prime however as I am at home
> > today). Place this code in an inline on the procedure on which your
> > triallist is.... so... on your experimentprocedure you should make a
> > blocklist with a blockprocedure and on the blockprocedure you place
> > this in an inline in front of the triallist which you also place on
> > the blockprocedure. The inline fills the 9 levels of the triallist and
> > then the procedure proceeds to run the triallist. By setting the
> > blocklist to repeat a x number of times, the procedure that contains
> > the triallist-filling-inline as well as the triallist itself (set the
> > triallist to run once but random!) will be run an x number of times
> > and on each run the triallist will receive new random distractors.
>
> > Explanation of the code:
> > disarray is the array that holds the distractorstimulinames and is as
> > big as the number of stimuli you have... say you have 4 different
> > stimuli (blue circle, yellow circle, blue square, yellow square) this
> > is array has 4 levels and because 0 is also a level it is defined as
> > disarray(3).
>
> > Each level of the array (number between brackets) is filled with a
> > filename and then the array is randomized.
>
> > Then m refers to level numbers. In the 'codeline' "triallist.SetAttrib
> > m", m can be 1, 2, 3 etc up to 9 as we have 9 levels (nine positions
> > of the target). The code For m = 1 to 9 makes eprime repeat the code
> > that is between that line and the line 'next m' 9 times, each time
> > replacing m in the inbetween code.
>
> > A similar array is used to randomise the stimattribute into which each
> > filename is placed. We have attributes called disstim1, disstim2 etc,
> > so we need to manipulate the identifying numbers randomly. For that we
> > create an array with 8 levels (randomposarray(7) ) and fill it with
> > the numbers 1 to 8.
>
> > I understood from your post that in each trial 2 distractors will be
> > used four times, so the code fills four of the 'stimx' cells with the
> > filename that is in level 0 of the randomized array, and another four
> > with the filename that is in level 1 of the array. After filling level
> > m = 1 it restarts from 'for m = 1-9' and goes to fill level m=2.  At
> > restarting from 'for m = 1 to 9' it rerandomizes the arrays before it
> > starts filling the random-n cells of disstim with the new (because
> > rerandomizing the array) filenames that are in level 0 and 1 of the
> > array.
>
> > The two arrays are best created on the usertab of the scriptwindow.
> > There you place the following lines:
>
> > ************
> > *create an array to hold your 4 (? otherwise adjust) distractor
> > filenames and another one that holds the 8 identifying numbers of the
> > 8 distractor stimuli.
> > dim disarray(3) as string
> > dim randomposarray(7) as integer
> > ************
>
> > The rest goes in the inline preceding the triallist. Although
> > placement kinda depends on your needs... if you use one target
> > troughout the experiment the filling of the arrays can also be done on
> > the usertab or you could move both the dim array lines and the filling
> > lines to a place in the beginning of your experiment. If you want
> > different blocks with different targets  you'll have to refill the
> > distractorarray each time the target changes (cause then automatically
> > the distractors change too). Just make sure that e-prime does not have
> > to repeat the dim-lines, cause it doesn't like that.
>
> > *************inlinecode*******
> > *fill the distractorarray with the filenames.
> > disarray(0) = stimname1.png
> > disarray(1)= stimname2.png
> > disarray(2)=stimname3.png
> > disarray(3)=stimname4.png
>
> > * fill randomposarray with the numbers 0 -7
> > randomposarray(0) = 1
> > randomposarray(1) = 2
> > randomposarray(2) = 3
> > randomposarray(3) = 4
> > randomposarray(4) = 5
> > randomposarray(5) = 6
> > randomposarray(6) = 7
> > randomposarray(7) = 8
>
> > *tell eprime to repeat the following code up to 'next m' 9 times, with
> > m = 1, m=2, m=3 etc, m is levelnumber of the triallist that is to be
> > filled.
> > for m = 1-9
>
> > *at the beginning of filling each level, first randomize the arrays
> > that hold the filenames and the identifying numbers of each
> > distractor.
> > randomizearray disarray
> > randomizearray randomposarray
>
> > *Four disstims get the filename that is in level 0 of the array. Which
> > four is defined by the randomized randomposarray: first we fill the
> > stims that have the numbers that are now in the first *four levels of
> > randomposarray (levels 0-3, replaced by n in this line of code)
> > for n = 0-3
>
> > triallist.SetAttrib m, "disstim" & randomposarray(n), disarray(0)
>
> > next n
>
> > *the second four disstims (the numbers are given by levels 4 to 7 of
> > randomposarray) get the filename that is in level 1 of the
> > distractorarray
> > for n = 4-7
>
> > triallist.SetAttrib m, "disstim" & randomposarray(n), disarray(1)
>
> > next n
>
> > *when e-prime gets here 1 level (m) of the triallist is filled and it
> > goes back to 'for m = 1 to 9' to do the next m.
> > next m when all m (9) levels are filled it wil start running the
> > triallist (as this is next on the blockprocedure).
> > ************endofcode********
>
> > That all said... in the old paper and pencil days visual search tasks
> > weren't randomized either... -_-
>
> > Good luck!
>
> > liw
>
> > On Mar 11, 1:07 am, Vera <vera.d... at googlemail.com> wrote:
>
> > > Thanks a lot Liwenna! :)
>
> > > Well I am going to have a look at all this tomorrow, it will for sure
> > > go all better with a fresh head. In the meanwhile I started
> > > "programming" a bit though (I think there isn't really any other
> > > solution here - I am not very happy with this, but ok). I will see how
> > > far I get, in the meanwhile, luckily, there is always the forum to get
> > > some help. :)
>
> > > Take care, Vera
>
> > > On Mar 11, 12:31 am, liwenna <liwe... at gmail.com> wrote:
>
> > > > and this thread could be of help too...http://groups.google.com/group/e-prime/browse_thread/thread/e955c2610...
> > > > it contains the basic code that I used for the experiment with 1
> > > > target and 15 distractors .
>
> > > > On Mar 11, 12:25 am, liwenna <liwe... at gmail.com> wrote:
>
> > > > > and I read your reply a bit hasty at first (as I was
> > > > > multitasking... ;) ) but the thing I posted now is pretty much similar
> > > > > to your latest idea.
> > > > > The thread I posted is about something entirely different though. I
> > > > > posted it just for the lines that show how to fill an array and use it
> > > > > to fill a triallist.
>
> > > > > Hope it helps!
>
> > > > > On Mar 11, 12:16 am, liwenna <liwe... at gmail.com> wrote:
>
> > > > > > Hey Vera,
>
> > > > > > Yes you are totally right about the pseudorandomness of my proposed
> > > > > > solution.
>
> > > > > > There is a real random way (I use it for a task with 1 target and 15
> > > > > > distractors) that involves loading imagenames (I used external .txt
> > > > > > files as the list of distractors depends on the targetstimulus and
> > > > > > thus I had 15 lists of 15 distractorimages) into an array (you could
> > > > > > also fill the array in an inline though), randomising the array and
> > > > > > then filling the triallist.
>
> > > > > > Parts of the code needed can be found in this thread:http://groups.google.com/group/e-prime/browse_thread/thread/b44513145...
>
> > > > > > I didn't suggest this as I was under the impression that you were
> > > > > > seeking for a programming-free solution.
>
> > > > > > best,
>
> > > > > > liw
>
> > > > > > On Mar 10, 10:55 pm, Vera <vera.d... at googlemail.com> wrote:
>
> > > > > > > Hi Liwenna,
>
> > > > > > > first a big, huge thanks for replying!! :) It sure makes one want to
> > > > > > > rip out less hair just knowing that you're not alone. ;)
> > > > > > > Just a few comments on what you wrote:
>
> > > > > > > > One thing that is elemental to understand when using e-prime, is that
> > > > > > > > on each run of a procedure one level of each of the nested lists can
> > > > > > > > be used. If you need nine different pictures in one 'run of the
> > > > > > > > procedure' you can not put them in different rows as e-prime can only
> > > > > > > > acces one level of each list on each run. So... you wrote: " like
> > > > > > > > putting the 9 images in one line of the nested
>
> ...
>
> read more »

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