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Re: st: Identifying the best scale without a "gold standard"
From
"Seed, Paul" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Identifying the best scale without a "gold standard"
Date
Wed, 16 Nov 2011 11:48:49 +0000
Thank you Ronan. A good point, well made.
Paul T Seed MSc CStat CSci, Senior Lecturer in Medical Statistics,
King's College London, Division of Women's Health
(& Department of Primary Care and Public Health Sciences)
St Thomas' Hospital, Westminster Bridge Road, London SE1 7EH
On Tue, 15 Nov 2011 09:53:29 +0000 Ronan Conroy <[email protected]> wrote:
>Subject: Re: st: Identifying the best scale without a "gold standard"
>On 2011 Samh 14, at 20:53, Seed, Paul wrote:
>> The research problem is to identify the best single scale for measuring breathlessness
>> from the six candidates. I was therefore interested in a valid test for
>> identifying agreement of individual measures with a latent factor
>> to which they all contributed.
>
>The definition of 'best scale' is not without its difficulty. In most cases, scales are expected to make both longitudinal and cross-sectional measurements. >For this reason, the ability to detect difference between groups that ought to be different, and to detect change in individuals when such change can >reasonably be expected is also important.
>
>Ronán Conroy
>[email protected]
>Associate Professor
>Division of Population Health Sciences
>Royal College of Surgeons in Ireland
>Beaux Lane House
>Dublin 2
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