title: RASCH FIRST? FACTOR FIRST?
authors.affiliation: RTI Health Solutions, Research Triangle Park, NC, USA.
authors.forename: W H
authors.initials: WH
authors.lastname: Chen
authors.affiliation: RTI Health Solutions, Research Triangle Park, NC, USA.
authors.forename: L D
authors.initials: LD
authors.lastname: McLeod
authors.affiliation: RTI Health Solutions, Research Triangle Park, NC, USA.
authors.forename: T M
authors.initials: TM
authors.lastname: Coles