query

[Amy Eschman]

Dear Roy,

There is a sample experiment at the E-Prime support site that
illustrates a method you can use to "remember" which stimuli have or
have not been shown during the study phase.  While this sample doesn't
do exactly what you describe below in terms of trials and blocks, it
illustrates the SetAttrib and GetAttrib methods of the List object,
which will allow you to mark a specific stimulus as sampled, then refer
to this value again when selecting your additional stimuli.

Log in to the support site at www.pstnet.com/e-prime/support/login.asp
Once you have logged in, click the Download button to find the Samples.
The sample is called Study-Recall.

Hope this helps.

Amy Eschman

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-----Original Message-----
From: Roy Allen [mailto:roy.allen at abdn.ac.uk]
Sent: Monday, July 15, 2002 4:18 AM
To: eprime at mail.talkbank.org
Subject: query


I'm trying to devise an experiment where, during the study phase,
participants see a 
random selection of 12 of 15 pictorial stimuli from each of 27 blocks.
Each set of 12 is 
presented, one after the other, before the next set of 12 and so on.  
The problem arises during the test phase when I want to present them
with the 3 
remaining stimuli plus 3 randomly selected stimuli that they have
already seen from 
each block. This time the presentation should be entirely random, rather
than in sets 
of 6.
How do I get E-Prime to "actively" remember what has and hasn't been
shown during 
the study phase, and how do I set up the test phase?
Hope that makes sense and thanks in anticipation.Roy Allen
Cognitive Electrophysiology and Memory Laboratory
Department of Psychology
University of Aberdeen
AB24 2UB
email: roy.allen at abdn.ac.uk
tel: (+44) (0)1224-272387
fax: (+44) (0)1224-273426