Developing an initial physical function item bank from existing sources.
The objective of this article is to illustrate incremental item banking using health-related quality of life data collected from two samples of patients receiving cancer treatment. The kinds of decisions one faces in establishing an item bank for computerized adaptive testing are also illustrated. Pre-calibration procedures include: identifying common items across databases; creating a new database with data from each pool; reverse-scoring "negative" items; identifying rating scales used in items; identifying pivot points in each rating scale; pivot anchoring items at comparable rating scale categories; and identifying items in each instrument that measure the construct of interest. A series of calibrations were conducted in which a small proportion of new items were added to the common core and misfitting items were identified and deleted until an initial item bank has been developed.
Bode
Rita K
RK
Center for Rehabilitation Outcomes Research, Rehabilitation Institute of Chicago, 345 East Superior Street, Chicago, IL 60611, USA. r-bode@northwestern.edu
Cella
David
D
Lai
Jin-shei
JS
Heinemann
Allen W
AW
D000223:Adaptation, Psychological; D003625:Data Collection; D019992:Databases as Topic; D006801:Humans; D009369:Neoplasms / Q000503:physiopathology* / Q000523:psychology / Q000628:therapy; D011594:Psychometrics; D011788:Quality of Life / Q000523:psychology*; D018434:Sickness Impact Profile; D014481:United States