[Rasch] Bunched versus spread out items to measure depression

Bond, Trevor trevor.bond at jcu.edu.au
Sat Jul 23 11:15:36 EST 2011


Ooops drinking champagne at breakfast time:
Large person SE (sic.)= too few items. Or huge targetting problem


On 23/07/11 8:39 AM, "Bond, Trevor" <trevor.bond at jcu.edu.au> wrote:

> 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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u
> 
> 
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