nested lists

[Tony Zuccolotto]

Felix,

If you want to assure a full & controlled crossing of those factors then
you should do the full crossing in a single list and not use nesting.
With nesting, each list is sampled independently so (depending on when
reshuffles/resets occur within the sampling) you cannot guarantee that
all combinations of attributes will be hit.

I recommend you take a look at the Factor Table Wizard spreadsheet that
is located in the E-Prime program group on the Start menu.  Using this
utility you can define each factor and its levels independently and then
have the wizard do the full crossing for you.   You can then copy/paste
the cells from the spreadsheet into a List object within E-Prime.   This
process will save you a lot of typing and potential errors when you have
a lot of factors or factors with a lot of levels.

Hope that helps,
Tony

Anthony P. Zuccolotto
President and Chief Executive Officer
Psychology Software Tools, Inc.
2050 Ardmore Boulevard
Suite 200
Pittsburgh, PA 15221-4610
Phone     412-271-5040
FAX       412-271-7077
Email     anthony.zuccolotto at pstnet.com
Internet  http://www.pstnet.com


> -----Original Message-----
> From: eprime at mail.talkbank.org [mailto:eprime at mail.talkbank.org] On
Behalf
> Of Felix Fischer
> Sent: Tuesday, August 01, 2006 7:25 AM
> To: EPRIME at MAIL.TALKBANK.ORG
> Subject: nested lists
> 
> hi everybody,
> 
> i got a new problem. ;-)
> 
> my experiment contains three factors: distance, size and angle. i want
> to use nested lists to combine every distance with every size with
every
> angle.
> 
> how to do this?
> 
> at the moment i've got list1 contains attribute size, then nested
list2
> with attribute distance and then nested list3 containing different
> angels. the problem is, that not every combination is presented, but
> some more than one time.
> 
> i think, i also tried with three (distance, size, angle) lists nested
> under one, and got the same problem.
> 
> thank you for your support
> f.fischer