Question about attribute referencing

[Adam Osth]

Hey -

I apologize if this question is really simplistic, but I'm completely new to
Eprime and I'm having problems designing a recognition memory experiment.

In this experiment, I need to present subjects with 8 pictures all of
different categories (like dogs, cats, birds, etc) and then subsequently
test them on their recognition of the studied pictures as well as new
pictures from the studied categories as well as new pictures from unstudied
categories. There are 16 total categories each containing 9 different
pictures.

I've structured the experiment such that within the Blocks list, I have a
Categories list nested to the Blocks list and the 16 picture categories
nested to the Categories list. The individual categories lists all have
references to the specific picture files. Overall categories list has a
generic attribute [Stimulus] that links to the individual pictures within
each categories list. *All* of these lists are randomized.

So it goes like this:

Blocks
     -Categories (contains attribute [Stimulus]
          -*16 individual categories* (attribute [Stimulus] links to picture
files

After the category lists, the Block Proc begins. First up is the study
presentation phase, which should cycle through the first 8 categories on the
list and present one picture from the individual categories. To do this, I
have a StudyProc that loops 8 times and contains a picture file that uses
[Stimulus] as its reference.

My problem is that the picture file ends up just showing the same picture 8
times each time I run the experiment.

I was thinking about adding an attribute to the Categories list like
"Studied", with a default that says "no", and adding an inline command after
each picture presentation that changes the status of "Studied" to "No".

My question is - in the ImageDisplay properties, what do I type into the
filename to ensure that it only shows pictures that have not been shown
before? I've tried typing Studied.No, [Stimulus.Studied=No], Studied=No, but
I can't seem to figure it out and I couldn't find anything in the help files
about this.

If anybody could be so kind as to point me in the right direction, I would
be really grateful.

Adam

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