randomizing blocks

[David McFarlane]

Chen,

>I don't seem to be able to "nest" a List object under BlockProc as 
>in your outline.
>Any suggestions?

This is basic, introductory knowledge that you should get from 
working through the Guides that came with E-Prime, and/or by taking a 
training course, and you need to do that first.

Regards,
-- David McFarlane


At 10/14/2013 05:26 PM Monday, Chen G wrote:
>Thanks, David.
>The structure I have is a bit different, it looks either like this:
>
>SessionProc
>      BlockList
>BlockATrialList
>BlockAProc
>BlockBTrialLIst
>BlockBProc
>
>or if I try using one BlockProc for both lists and specify it only 
>at the BlockList level, then it looks like:
>
>SessionProc
>      BlockList
>BlockATrialList
>BlockBTrialLIst
>BlockBProc
>
>I don't seem to be able to "nest" a List object under BlockProc as 
>in your outline.
>Any suggestions?
>
>Thanks,
>Chen
>
>
>On Monday, October 14, 2013 9:42:52 PM UTC+3, McFarlane, David wrote:
>Chen,
>
>I must be missing something, because I cannot see what's wrong
>here.  I imagine that you have a structure like
>
>SessionProc
>      BlockList
>          BlockAProc
>              BlockATrialList
>          BlockBProc
>              BlockBTrialLIst
>          ...
>
>(there are actually better ways to structure this (e.g., using a
>single BlockProc, and using an attribute to select the trial List),
>but this is how most beginners would do it).
>
>In that case, if you set Order of BlockList to Random, and Order of
>each BlockXTrialList to Sequential, then E-Prime will present your
>blocks in random order, but trials within each block in sequential
>order (I have students practice this in my online course).
>
>What am I missing?
>
>-----
>David McFarlane
>E-Prime training
>online: 
><http://psychology.msu.edu/Workshops_Courses/eprime.aspx>http://psychology.msu.edu/Workshops_Courses/eprime.aspx 
>
>Twitter:  @EPrimeMaster 
>(<https://twitter.com/EPrimeMaster>https://twitter.com/EPrimeMaster )
>
>/----
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>
>
>At 10/14/2013 10:00 AM Monday, Chen G wrote:
> >I'm trying to design an experiment that consists of several blocks
> >of stimuli, such that the order of stimuli within each block is
> >fixed, but the order of the blocks is random. For some reason I
> >can't get it to work - when I run the experiment stimuli belonging
> >to different blocks are getting mixed.
> >I used a main List object under the SessionProc with references to
> >the different blocks in the Nested column. Each block is itself a
> >List object which contains the relevant stimuli for that block. I
> >tried defining one procedure for all the blocks and I also tried
> >defining a separate procedure for each block. None seem to produce
> >the desired results.
> >Any idea what I did wrong?
> >
> >Thanks,
> >
> >Chen

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