A Differential Item Functioning (DIF) Analysis of the Communicative Participation Item Bank (CPIB): Comparing Individuals With Parkinson's Disease From the United States and New Zealand

Author:

Baylor Carolyn1,McAuliffe Megan J.2,Hughes Louise E.2,Yorkston Kathryn1,Anderson Tim3,Kim Jiseon1,Amtmann Dagmar1

Affiliation:

1. University of Washington, Seattle

2. University of Canterbury, Christchurch, New Zealand

3. New Zealand Brain Research Institute, Christchurch

Abstract

Purpose To examine the cross-cultural applicability of the Communicative Participation Item Bank (CPIB) through a comparison of respondents with Parkinson's disease (PD) from the United States and New Zealand. Method A total of 428 respondents—218 from the United States and 210 from New Zealand—completed the self-report CPIB and a series of demographic questions. Differential item functioning (DIF) analyses were conducted to examine whether response bias was present across the 2 groups. Results No items were identified as having statistically significant DIF across the U.S. and N.Z. cohorts. Conclusion The current CPIB items and scoring parameters are also suitable for use with respondents from New Zealand.

Publisher

American Speech Language Hearing Association

Subject

Speech and Hearing,Linguistics and Language,Language and Linguistics

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