Validating the Communicative Participation Item Bank (CPIB) for use with people with aphasia: an analysis of differential item function (DIF)

Abstract

Most PWA were able to respond to CPIB items, although most required or requested support. Although these results are preliminary due to a small sample size, the data support that the CPIB may be valid for PWA. Caution is warranted regarding proxy report because of low correlation between PWA and proxy ratings.