creating a list from program's choices within a larger list

[Eliezer Kanal]

I would add an attribute to the target list (the one with 17 pictures)  
named "Displayed" with a default value of "false", and then at run  
time set that attribute to "true" for each of the 10 pictures shown to  
the user. Later on, you would choose the seven pictures with the  
attribute still set to false, and seven pictures with that attribute  
set to true. Good luck!

Eliezer Kanal


On Mar 24, 2009, at 1:11 PM, ttnicky wrote:

>
> I am creating an experiment where I have a target list of 17 pictures:
> the program randomly chooses 10 of those pictures for display (I have
> that part down ok). However, later in the experiment I do a
> recognition test and I need to somehow differentiate the 10 pictures
> already shown from the 7 not already shown, such that 7 of the old 10
> items are randomly displayed with the 7 pictures not previously
> displayed. I would just reset the list following the first
> presentation and set it to pick 14 randomly from the list, but it's
> important that I have 7 old and 7 new pictures displayed at random.
> NOTE: pictures are displayed individually.
>
> Any ideas? Thanks
> >


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