Date: Wed, 20 May 2009 15:49:16 +0800
Reply-To: Paola Chivers <pc8@bigpond.net.au>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Paola Chivers <pc8@bigpond.net.au>
Subject: AMOS and imputation.
Content-Type: multipart/alternative;
Hi,
I apologise in advance for my simple questions ... but I am new in
Structural equation modelling and AMOS.
My data set has missing values, and as such I am going down the path of data
imputation. IN this regard I have two questions based on two different
approaches.
1. Firstly, if I have an imputed data file (created in SPSS using the
missing values module), how do I then use this file in AMOS that will
provide me a pooled estimate using my 20 imputed data sets? Is this even
possible? [Note I have attempted this, specifying through spss the split
file using the imputation variable, but when I run my amos model, it assumes
this file is complete and my sample size is 20 times, instead of the pooled
estimate. ]
a. Also critical, my computer does not have the missing values module
(imputation was performed on another computer), but does recognise the file
as an imputed file - I've been told by SPSS that this should not be a
problem (response below).
2. Otherwise, can anyone provide me a good reference on how to use the
data imputation built in with AMOS v17. I have tried using this function,
but after a long time, it just keeps bombing out.
Any guidance and recommended further reading would be appreciated.
Regards,
Paola.
_____
Hi Paola,
Once you have imputed values using the Missing Values module, if you then
save your data file, you will be able to continue your analysis and SEM
using your Grad Pack of SPSS 17 and AMOS on that data file with the imputed
values. It is highly recommended that you save the imputed values in a new
file in case you do need to refer back to the original data file.
I hope this helps.
Thanks,
Tanya Hayes
Account Manager
SPSS Australasia Pty Ltd
Ph: +61 2 9492 2335 | Fax: +61 2 9492 2335 | Email: thayes@spss.com
Level 21, Tower B, Zenith Centre | 821 Pacific Hwy, Chatswood NSW 2067
Ph: +61 2 9492 2300 | Fax: +61 2 9492 2301 | Web: www.spss.com/au
------ Forwarded Message
Date: Tue, 19 May 2009 16:34:11 +0800
Subject: Grad Pack missing values module compatibility with AMOS
HI,
I am currently using the Grad Pack version of spss v.17. It does not have
the missing values module, and as a student in Australia I cannot purchase
this add on module.
I am currently wanting to run an AMOS SEM but I have missing data - so
ideally need to impute data using Bayesian imputation. Can anyone tell me:
. if I run the imputation module through the missing values module
(externally - using another computer with the full version of spss 17) to
create an imputed file, can I then use this imputed file in my grad pack
version of SPSS v17 with AMOS (without the missing values module)?
Before someone asks why I don't just use the 'other' computer for my
analysis - I am an external student (2 1/2 hrs from campus - which has the
full version) and need to be able to work on the SEM models long term from
home (months) with the Grad Pack version only.
Any advice, or others experience would be appreciated.
_____
Regards,
Paola
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