[Rasch] Bunched versus spread out items to measure depression

Bond, Trevor trevor.bond at jcu.edu.au
Sat Jul 23 10:39:22 EST 2011


Large person SD = too few items.
Bunching items is useful if you have a high stakes cut-point to use.
Best
T


On 21/07/11 8:48 PM, "Michael Lamport Commons" <commons at tiac.net> wrote:

> Dear List Members:

What are the disadvantages and advantages of having the
> Rasch item scores bunched up with a small S.D. versus spread out for items to
> measure depression?  There person Rasch score have a very large S.D. which
> indicates that the items are capturing a wide range of depression



My
> Best,

Michael Lamport Commons, Ph.D.
Assistant Clinical Professor

Department
> of Psychiatry
Harvard Medical School
Beth Israel Deaconess Medical Center
234
> Huron Avenue
Cambridge, MA 02138-1328

Telephone (617) 497-5270
Facsimile
> (617) 491-5270
Cellular (617)
> 320­0896
Commons at tiac.net
http://dareassociation.org/
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