trevor.bond at jcu.edu.au
Fri May 9 00:59:57 EST 2008
BUT such additional dimensions do not invalidate the use of the Rasch
scores, as these have already separated out the ability dimension of
oh - but they do invalidate it as providing MEASURES /(Rasch scores)
N is the sufficient statistic for ability only to the extent that the
data fit the model.
remaining structures in the residuals tell us that the Rasch
dimension is not all (most / enough) of what is in the data set.
Trevor G BOND Ph D
Professor and Head of Dept
Educational Psychology, Counselling & Learning Needs
D2-2F-01A EPCL Dept.
Hong Kong Institute of Education
10 Lo Ping Rd, Tai Po
New Territories HONG KONG
Voice: (852) 2948 8473
Fax: (852) 2948 7983
More information about the Rasch