Date: Wed, 27 May 2009 15:12:23 -0500
Reply-To: "Swank, Paul R" <Paul.R.Swank@uth.tmc.edu>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Swank, Paul R" <Paul.R.Swank@uth.tmc.edu>
Subject: Re: converting 1-5 rating into 1-6 rating scale
In-Reply-To: <708510.82736.qm@web52709.mail.re2.yahoo.com>
Content-Type: multipart/alternative;
If you are looking at data over time, I am not sure that using z scores will help you since the mean at each time will be the same.
Dr. Paul R. Swank,
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center-Houston
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of George Musick
Sent: Tuesday, May 26, 2009 4:03 PM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: converting 1-5 rating into 1-6 rating scale
That might work - someone must have attempted this in the past.
--- On Tue, 5/26/09, Guerrero, Rodrigo <RGuerrero@thescooterstore.com> wrote:
From: Guerrero, Rodrigo <RGuerrero@thescooterstore.com>
Subject: RE: Re: converting 1-5 rating into 1-6 rating scale
To: "George Musick" <georgemusick@yahoo.com>, SPSSX-L@LISTSERV.UGA.EDU
Date: Tuesday, May 26, 2009, 4:52 PM
Can this data be converted to Z-scores and then analyzed?
RG
Rodrigo A. Guerrero | Director Of Marketing Research and Analysis | The Scooter Store | 830.627.4317
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of George Musick
Sent: Tuesday, May 26, 2009 3:41 PM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: converting 1-5 rating into 1-6 rating scale
I'm not a statistician, but this sounds like trouble.
Sure you can do this by conditionally selecting respondents based on a random number. However, you are arbitrarily assigning some "fence sitters" to a positive response and others to a negative response - that is just part of it.
Are you deriving a different assignment formula for each of the 70 scales?
Why not NOT recode your data and instead run significance across the years on the means after you factor up 2007's means by .833333...? And then be done with it.
I'd love to hear some stats' folks take on this as I have attempted this in the past on a limited number of scales.
George
--- On Tue, 5/26/09, ajay atluri <atluriak@gmail.com> wrote:
From: ajay atluri <atluriak@gmail.com>
Subject: converting 1-5 rating into 1-6 rating scale
To: SPSSX-L@LISTSERV.UGA.EDU
Date: Tuesday, May 26, 2009, 1:39 PM
Hi Team,
I am working on SPSS 16 Base. I have 500 participants and 70
questions in the data. All these questions are of 1-5 point scale in
2007 data. But, 2009 data we have same set of participants and
questions but rating was changed from 1-5 scale rating to 1-6 rating
scale.
At this juncture, I would like to convert all 2007 data into 6 point
scale. To do this i have defined some formulae.
We need to convert 75% who has given the answer as 5 and 12% who have
given the answer as 4 into 6. And for getting number of responses for
5, I will be converting 5-5, 4-5 and 3-5 by considering the following
percentage of respondents 25%, 70% and 15% into 5. This list will go
on.
Does any one in the forum has done in a similar way? If so, please
share the syntax with me.
Thanks,
Atluri
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