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st: RE: RE: RE: uses of Bland-Altman plots


From   "Hom, Willard" <[email protected]>
To   "'[email protected]'" <[email protected]>
Subject   st: RE: RE: RE: uses of Bland-Altman plots
Date   Tue, 6 Dec 2005 15:04:23 -0800

Thank you for all of that information. I was primarily concerned that there was some underlying
theory that limited this type of comparison to the health/medical field or to physical measurements
by two mechanical (non-human) devices.  When the literature about its use seemed to come only from
one field, I began to wonder if I had missed something.

Willard Hom 

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Nick Cox
Sent: Tuesday, December 06, 2005 2:47 PM
To: [email protected]
Subject: st: RE: RE: uses of Bland-Altman plots


More generally, Bland-Altman plots are just 
special case of residual vs fitted plots, 
an idea with even longer roots. So after
an appropriate -regress-, -rvfplot- is 
yet another way to do it. 

Other discussions of this area have appeared in 

2004. Graphing agreement and disagreement. 
The Stata Journal 4: 329--349. 

and will appear in 

Assessing agreement of measurements and 
predictions in geomorphology. Geomorphology
in press                    

Nick 
[email protected] 

Nick Cox
> 
> Recently I've realised that in adding some details 
> to -concord-, Tom Steichen and I have unwittingly 
> revisited territory surveyed by Paul Seed in STB-55. 
> As he in turn didn't quote our prior work from STB-43 this 
> may look like some sordid dispute, but in each 
> case no more than ignorance and oversight is to blame. 
> 
> Nick 
> [email protected] 
> 
> Hom, Willard
>  
> > I'm wondering if anyone knows if it is appropriate to use the 
> > Bland-Altman approach (as implemented
> > in STATA) for comparing the measurements from two separate 
> > rating mechanisms.  That is, I'm checking
> > whether two rating sytems that rate the same population of 
> > objects can be "tested" for their
> > equivalence through the Bland-Altman method (plots, etc.).  
> > 
> > In my perusal of literature that mentions use of the 
> > Bland-Altman method, I have only seen its
> > application in the comparison of two measurement devices that 
> > measure 'physical qualities" (as in
> > medical/health research).  Has anyone seen an application 
> > (and a defensible one) of the method in
> > psychology, sociology, or economics, where there may be an 
> > interest in exploring the equivalence of
> > two sets of ratings of the same objects/persons/constructs....

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