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 PurposeTo 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.MethodA 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. ... Research Article
Research Article  |   February 01, 2014
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 Affiliations & Notes
  • Carolyn Baylor
    University of Washington, Seattle
  • Megan J. McAuliffe
    University of Canterbury, Christchurch, New Zealand
  • Louise E. Hughes
    University of Canterbury, Christchurch, New Zealand
  • Kathryn Yorkston
    University of Washington, Seattle
  • Tim Anderson
    New Zealand Brain Research Institute, Christchurch
  • Jiseon Kim
    University of Washington, Seattle
  • Dagmar Amtmann
    University of Washington, Seattle
  • Disclosure:The authors have declared that no competing interests existed at the time of publication.
    Disclosure:The authors have declared that no competing interests existed at the time of publication.×
  • Correspondence to Carolyn Baylor: cbaylor@u.washington.edu
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Julie Liss
    Associate Editor: Julie Liss×
Article Information
Special Populations / Older Adults & Aging / International & Global / Speech
Research Article   |   February 01, 2014
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
Journal of Speech, Language, and Hearing Research, February 2014, Vol. 57, 90-95. doi:10.1044/1092-4388(2013/12-0414)
History: Received December 21, 2012 , Revised May 2, 2013 , Accepted June 13, 2013
 
Journal of Speech, Language, and Hearing Research, February 2014, Vol. 57, 90-95. doi:10.1044/1092-4388(2013/12-0414)
History: Received December 21, 2012; Revised May 2, 2013; Accepted June 13, 2013
Web of Science® Times Cited: 6

PurposeTo 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.

MethodA 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.

ResultsNo items were identified as having statistically significant DIF across the U.S. and N.Z. cohorts.

ConclusionThe current CPIB items and scoring parameters are also suitable for use with respondents from New Zealand.

Acknowledgments
This study was made possible by funding from the National Institute on Deafness and Other Communication Disorders (Grant 1R03DC010044; principal investigator Carolyn Baylor) and the New Zealand Institute of Language, Brain and Behaviour. We thank subjects for their time and efforts participating in this study. We would also like to acknowledge student research assistants in the United States who assisted with data collection, Christina Gray and Brittney Skrupky, and the Washington Parkinson's Disease Registry at the University of Washington. Assistance with participant recruitment in New Zealand was provided by Parkinson's New Zealand, the New Zealand Brain Research Institute, and speech therapists from district health boards across New Zealand.
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