Reverse Coding

[Courtney M. Cronley]

Quick question - how does one reverse code a quantitative variable, e.g. income?

Courtney Cronley, Ph.D.
Postdoctoral Associate
Center of Alcohol Studies
Rutgers University
[hidden email]

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[Swank, Paul R]

Subtract each value from the largest value possible or the largest observed. This retains the equal intervals, assuming they are equal in the first place. Why do you need to do this?

Dr. Paul R. Swank,
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center-Houston


-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Courtney M. Cronley
Sent: Wednesday, September 29, 2010 2:59 PM
To: [hidden email]
Subject: Reverse Coding

Quick question - how does one reverse code a quantitative variable, e.g. income?

Courtney Cronley, Ph.D.
Postdoctoral Associate
Center of Alcohol Studies
Rutgers University
[hidden email]

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
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=====================
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[John F Hall]

Like Paul says, but if you have income groups, not actual, you need to use max + 1 to reverse codes.  Thus if you have 5 groups 1 thru 5 you need

 

compute newvar = 6 - oldvar .

 

I suspect you need max + 1 for actual income as well.

 

John Hall
[hidden email]
http://surveyresearch.weebly.com

----- Original Message -----

From: [hidden email]

To: [hidden email]

Sent: Wednesday, September 29, 2010 10:13 PM

Subject: Re: Reverse Coding

Subtract each value from the largest value possible or the largest observed. This retains the equal intervals, assuming they are equal in the first place. Why do you need to do this?

Dr. Paul R. Swank,
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center-Houston


-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Courtney M. Cronley
Sent: Wednesday, September 29, 2010 2:59 PM
To: [hidden email]
Subject: Reverse Coding

Quick question - how does one reverse code a quantitative variable, e.g. income?

Courtney Cronley, Ph.D.
Postdoctoral Associate
Center of Alcohol Studies
Rutgers University
[hidden email]

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
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=====================
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