[Rasch] I have two very different instruments that I think measure the same thing.
rense.lange at gmail.com
Fri Apr 22 03:09:03 EST 2011
Why not scale them (both tests = all items) together? If they really measure
the same thing, everything should fit. And, in this case you just have
defined a more reliable test of the construct.
No problem if some items don't fit, then you learned something useful also
2011/4/21 Michael Lamport Commons <commons at tiac.net>
> I have two very different instruments that I think measure the same
> thing. What tests do you think would be useful in comparing person scores.
> Note that the means will be close but the standard deviations might be more
> different. Should a simple t-test do?
> My Best,
> Michael Lamport Commons, Ph.D.
> Assistant Clinical Professor
> Department of Psychiatry
> Beth Israel Deaconess Medical Center
> Harvard Medical School
> 234 Huron Avenue
> Cambridge, MA 02138-1328
> Telephone (617) 497-5270
> Facsimile (617) 491-5270
> Cellular (617) 320–0896Commons at tiac.nethttp://dareassociation.org/
> Rasch mailing list
> Rasch at acer.edu.au
Rense Lange, Ph.D.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Rasch