Display nested list randomly

[Ali]

I have a List, nested with further 2 lists and those lists have 3 items each . The selection choose to be "Random" in parent list and weight for each list is '3'. What i want; it should show all elements of each list consecutively and then switch to 2nd child list and show all of it elements. the selection of child , nested list, is random. But currently it showing all elements randomly which is not required output. 

Required Output : a    b    c    d   e   f    "OR"     d   e   f   a   b   c

But currently it showing all elements randomly.Any one kindly help me to generate required output.

[David McFarlane]

You did not say, but I assume that you have your nested Lists set to
Sequential order, correct? Then look more closely at your program's
behavior, and see if it does the following: On each trial it randomly
picks ListA or ListB (i.e., img or img2 in your program), but elements
from each List still appear in their sequential order. E.g., if ListA
contains elements "a, b, c" and ListB contains elements "1, 2, 3", you get

a 1 b 2 c 3 -or- 1 2 a 3 b c

but never

c 3 1 a 2 b

To say that again, in my example, a, b, c and 1, 2, 3 always appear in
sequential order, but whether you get a letter or a number is random.
Please check and see if I got that right.

-- David McFarlane

On 2016-10-04 3:04 AM, Ali wrote:
> I have a List, nested with further 2 lists and those lists have 3 items
> each . The selection choose to be "Random" in parent list and weight for
> each list is '3'. What i want; it should show all elements of each list
> consecutively and then switch to 2nd child list and show all of it
> elements. the selection of child , nested list, is random. But currently it
> showing all elements randomly which is not required output.
>
>

> *Required Output : a b c d e f "OR" d e f a b
> c*

>
>
> But currently it showing all elements randomly.Any one kindly help me to
> generate required output.
>
>
>
>
>

> <https://lh3.googleusercontent.com/-g7YZ1G583hc/V_NQ_nmGxVI/AAAAAAAAAKU/iyAt3t2nVLsdT4qFSHBkZ4ro46hSCvaVACLcB/s1600/3.JPG>
>
>
> <https://lh3.googleusercontent.com/-cGJdfXY9zBc/V_NS8CD_p4I/AAAAAAAAAKg/PKlfmPRAZcI23ayWGtKd69TY6ZFBeZA4wCLcB/s1600/2.JPG>
>
> <https://lh3.googleusercontent.com/-A9z1wVALSkQ/V_NTI59WsRI/AAAAAAAAAKo/VKK3sYV-yPQuXyB1ZFtuftKyvdRlpbkRACLcB/s1600/1.JPG>

[Ali]

About selection method of nested list , i do mentioned  in my post. ->"the selection of child , nested list, is random."
 
What i want is, it should select the child list, img and img2 , randomly from TrailList and then show all elements of that specific selected list, randomly or sequentially, and when that list is finished, move to next child list.
for example ; in 1st Trail it chooses 'ListB' then it should show all  elements of selected child list,it doesn't matter randomly or sequentially, like 1 2 3 OR 2 1 3  OR  3 1 2 OR 1 3 2 OR 2 3 1  OR 3 2 1 and then move back to parent list to choose randomly for remaining child list, in our case that's only 1 left i.e. ListA and then show all elements of that list like a b c OR b c a OR   c b a  . .  ..  . . . . .

if still any ambiguity, let me know . 
Thanks 

[David McFarlane]

Let me try to restate your goal, and you let me know if I got this right.

You have two Lists, let's call them AList and BList, and each List has
some number of rows. You want to pick one List at random, and then
run all the items in that List, in some random order. Then you want
to move on to the second List, and run all those items in some random
order. Right?

Well, for that you would not used nested Lists. You would instead use
what I call "tiered Lists". You would start with a BlockList, which
has two rows, each with a Weight of 1, and set to random selection.
Each row would have a different Procedure, say BlockAProc and
BlockBProc. Then BlockAProc would use AList (set to random
selection), and BlockBProc would use BList (set to random selection);
both AList & BList would call the same trial Procedure. So the
structure looks something more like

- BlockList
- BlockAProc
- AList
- TrialProc
- BlockBProc
- BList
- TrialProc

Set up this way, BlockList will select ListAProc or ListBProc at
random, then run through all of either AList or BList in random order,
then run the remaining List in random order.

(I have outlined the simple but clumsy way to do this. There is a
nicer way where you use the same BlockProc for both rows of BlockList,
and then use an attribute in BlockList to supply the name of a List
that you use as a nested List in a single TrialList which takes the
place of both AList & BList, but that is for advanced users. I do
this all the time myself.)

(And yes, I have a lesson that covers nested vs. "tiered" Lists in my
online course.)

David McFarlane
E-Prime training online:
http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter: @EPrimeMaster (https://twitter.com/EPrimeMaster)

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[Ali]

Thanks alot for help. The solution turned to be what i wanted.