<div>Thank you very much, David! Your suggestion is really helpful! I will try it. Keep you posted.</div><div>Best,</div><div>Shensheng </div><div><br>On Wednesday, July 31, 2013 4:46:45 PM UTC-4, McFarlane, David wrote:</div><blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">Shensheng,
<br>
<br>In short, yes, E-Prime could handle this. Instead of dynamically
<br>generating "procedures", I would dynamically generate or manipulate
<br>Lists and just run them through the same Procedure, just as I would
<br>with any other programming platform. Too tedious to go into any
<br>further detail here, but as a start you might look at the
<br>"Study-Recall" example at the PST website, or maybe browse the
<br>examples at <a href="http://step.psy.cmu.edu" target="_blank">step.psy.cmu.edu</a> .
<br>
<br>-- David McFarlane
<br>
<br>
<br>At 7/31/2013 04:08 PM Wednesday, wdwss wrote:
<br>>I want to execute an experiment consisting of a series of sorting
<br>>tasks with 90 faces in the E-Prime. In the experiment, the
<br>>participants will be asked to indicate if a face is threatening or
<br>>nonthreatening by pressing either one of the two button boxes as
<br>>quickly as they can, during which RTs will be recorded. After the
<br>>first procedure of sorting that includes all 90 faces, some faces
<br>>(say, N= x) will be "threatening" and the rest (N= 90-x) will be
<br>>"nonthreatening". Then, within the x "threatening" faces, another
<br>>procedure of sorting based on "slightly threatening" and "very
<br>>threatening"will be administrated automatically. Then, additional
<br>>procedures of sorting based on more or less "threatening" ratings of
<br>>the faces will be dynamically and automatically generated to specify
<br>>the threatening levels of the faces. These series of procedures
<br>>continue until there is only one face left in the "more threatening"
<br>>group as you can imagine. Since experimenters don't know which faces
<br>>will be judged "threatening", "very threatening" or whatever labels
<br>>we name them, the length (or depth in terms of loops) of the whole
<br>>experiment is unknown prior to designing the E-Prime program.
<br>>
<br>>My question is if E-Prime and E-Basic have the capacity to enable
<br>>dynamic generation of new procedures, blocks and assigning stimuli
<br>>to them automatically based on the choice of participants? How to
<br>>accomplish that? I learned that the task I intend to accomplish
<br>>looks very similar to the Contingant Branching, but it still has its
<br>>unique problem with the uncertainty in the number and content of "Branching".
<br>>
<br>>Looking forward to your precious comments, suggestions and critics!
<br>>
<br>>Thanks a lot!
<br>>
<br>>Best,
<br>>
<br>>Shensheng
<br>
<br></blockquote>
<p></p>
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