Date: Thu, 15 Dec 2011 20:36:07 +0000
Reply-To: "Poes, Matthew Joseph" <mpoes@UILLINOIS.EDU>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Poes, Matthew Joseph" <mpoes@UILLINOIS.EDU>
Subject: Re: Calculating BDI score with SPSS20
In-Reply-To: <41AE3ADE-5D1B-42D5-A030-1DD85DEECAA8@yahoo.de>
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I think below would potentially be problematic if there was missing data. The problem you can run into is that missing is also not equal to yes.
I would probably handle it this way.
Do if Q19b="no".
Compute Q19a_r=Q19a.
End if.
Or
If Q19b="no" Q19a_r=Q19a.
Note that "No" is often coded as a number, if it actually says No in the data set and is thus a string variable, you would need to use the " around the NO. However, since it only can read the string exactly as it's written, I typically recode these kinds of string variables and do a check to be sure that they are all correctly recoded to a new indicator variable (typically 0=No and 1=Yes).
Another solution that would use the below method acceptably is to do a recode.
Recode Q19b ("yes"=0)("no"=1) into Q19bx.
Compute q19a_r=Q19a*Q19bx.
All of these approaches do the same thing. You just need to watch if a specific approach might include a group you don't want to include, such as those missing data.
Matthew J Poes
Research Data Specialist
Center for Prevention Research and Development
University of Illinois
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of SPSS Giesel
Sent: Thursday, December 15, 2011 2:21 PM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: Calculating BDI score with SPSS20
COMPUTE q19score = (q19b NE "yes") * q19a.
Untested. Hope that helps.
Good Luck,
Mario
==================
Mario Giesel
Im Kirchwinkel 12
52499 Baesweiler
Tel. 02401 / 693 9040
==================
Am 15.12.2011 um 20:42 schrieb benfranklin23 <coogan@upenn.edu>:
> I am a novice SPSS user and have (I believe) a fairly straightforward
> question, but don't know the correct terminology, so have been unable
> to find an answer online. I apologize in advance if this question is
> simplistic!
>
> I want to calculate scores for the Beck Depression Inventory (BDI) and
> already know how to create a variable for the total score (I have
> numbered responses of 0-3 for each question, and for most questions it
> is just a matter of adding up the responses) . However, question 19 has two parts.
> Part A is a normal 0-3 scale, but Part B has a yes or no response. If
> the response is "yes", part A should not be included in the total
> score, but if the response is "no" than Part A needs to be added.
>
> What is the correct terminology for the calculation I need to do, and
> can anyone explain to me how to do it?
>
> Thanks a lot!
>
> --
> View this message in context:
> http://spssx-discussion.1045642.n5.nabble.com/Calculating-BDI-score-wi
> th-SPSS20-tp5078520p5078520.html Sent from the SPSSX Discussion
> mailing list archive at Nabble.com.
>
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