title: 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.
abstract: OBJECTIVE
  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.
  
  
  METHODS
  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.
  
  
  CONCLUSIONS
  The current CPIB items and scoring parameters are also suitable for use with respondents from New Zealand.
authors.forename: Carolyn
authors.initials: C
authors.lastname: Baylor
authors.forename: Megan J
authors.initials: MJ
authors.lastname: McAuliffe
authors.forename: Louise E
authors.initials: LE
authors.lastname: Hughes
authors.forename: Kathryn
authors.initials: K
authors.lastname: Yorkston
authors.forename: Tim
authors.initials: T
authors.lastname: Anderson
authors.forename: Jiseon
authors.initials: J
authors.lastname: Kim
authors.forename: Dagmar
authors.initials: D
authors.lastname: Amtmann
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003147:Communication Disorders / Q000175:diagnosis* / Q000209:etiology*; D003431:Cross-Cultural Comparison; D004185:Disability Evaluation; D004401:Dysarthria / Q000175:diagnosis* / Q000209:etiology*; D005260:Female; D006801:Humans; D008037:Linguistics; D008297:Male; D008875:Middle Aged; D009520:New Zealand; D010300:Parkinson Disease / Q000150:complications*; D013068:Speech Production Measurement; D011795:Surveys and Questionnaires; D014481:United States