Permutation object

[David McFarlane]

ASI,

This is a question for PST Web Support 
(http://support.pstnet.com/e%2Dprime/support/login.asp ), so please 
ask them and then report back here with their response.  Chances are 
that they use some variety of 
http://en.wikipedia.org/wiki/Permutation#Generation_in_lexicographic_order .

But if you don't need to know until *after* each run, well then, the 
order used by each List is always explictly logged in the .edat file 
anyway, so you could just look at the results there without knowing 
the rule used.  In addition, you could always make up a simple mock 
program with an appropriate List (don't even need to show stimuli) 
just to explore how E-Prime generates its List sequences.  I do this 
sort of thing all the time, that's how I learned so much about EP Lists.

-----
David McFarlane
E-Prime training 
online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)

/----
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\----

At 7/9/2012 01:50 PM Monday, ASI wrote:
>Hi All,
>I'm using a permutation to set the order of the stimuli in my task 
>(selection -> order -> permutation).
>I have four types of stimuli {1, 2, 3, 4}. Each subject gets a 
>different order of these four elements (1 out of 24 possibilities).
>I need to know the exact order presented to each subject. What is 
>the rule eprime is using?
>Thanks,
>ASI

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