[Rasch] DIF and multiple comparisons

Fred Wolfe fwolfe at arthritis-research.org
Tue Feb 7 03:11:25 EST 2006


In performing item analysis for DIF, there were 20 items (scored 0-3). The 
question came up as to whether one should correct for multiple comparisons. 
Using the Bonferroni adjustment, that would convert the significant p value 
from 0.5 to 0.025. However, the items are not entirely independent. Within 
the Rasch schema, are there data, rules, suggestions as to whether 
correction for multiple comparisons should be undertaken?

Thanks,

Fred Wolfe

Fred Wolfe
National Data Bank for Rheumatic Diseases
Wichita, Kansas
Tel (316) 263-2125     Fax (316) 263-0761
fwolfe at arthritis-research.org





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