@article {35,
	title = {Expansion of a physical function item bank and development of an abbreviated form for clinical research},
	journal = {Journal of Applied Measurement},
	volume = {7},
	number = {1},
	year = {2006},
	pages = {1-15},
	publisher = {Richard M Smith: US},
	abstract = {We expanded an existing 33-item physical function (PF) item bank with a sufficient number of items to enable computerized adaptive testing (CAT). Ten items were written to expand the bank and the new item pool was administered to 295 people with cancer. For this analysis of the new pool, seven poorly performing items were identified for further examination. This resulted in a bank with items that define an essentially unidimensional PF construct, cover a wide range of that construct, reliably measure the PF of persons with cancer, and distinguish differences in self-reported functional performance levels. We also developed a 5-item (static) assessment form ("BriefPF") that can be used in clinical research to express scores on the same metric as the overall bank. The BriefPF was compared to the PF-10 from the Medical Outcomes Study SF-36. Both short forms significantly differentiated persons across functional performance levels. While the entire bank was more precise across the PF continuum than either short form, there were differences in the area of the continuum in which each short form was more precise: the BriefPF was more precise than the PF-10 at the lower functional levels and the PF-10 was more precise than the BriefPF at the higher levels. Future research on this bank will include the development of a CAT version, the PF-CAT. (PsycINFO Database Record (c) 2007 APA, all rights reserved)},
	keywords = {clinical research, computerized adaptive testing, performance levels, physical function item bank, Psychometrics, test reliability, Test Validity},
	isbn = {1529-7713 (Print)},
	author = {Bode, R. K. and Lai, J-S. and Dineen, K. and Heinemann, A. W. and Shevrin, D. and Von Roenn, J. and Cella, D.}
}
@article {236,
	title = {An item bank was created to improve the measurement of cancer-related fatigue},
	journal = {Journal of Clinical Epidemiology},
	volume = {58},
	number = {2},
	year = {2005},
	note = {Lai, Jin-SheiCella, DavidDineen, KellyBode, RitaVon Roenn, JamieGershon, Richard CShevrin, DanielEnglandJ Clin Epidemiol. 2005 Feb;58(2):190-7.},
	month = {Feb},
	pages = {190-7},
	type = {Multicenter Study},
	edition = {2005/02/01},
	abstract = {OBJECTIVE: Cancer-related fatigue (CRF) is one of the most common unrelieved symptoms experienced by patients. CRF is underrecognized and undertreated due to a lack of clinically sensitive instruments that integrate easily into clinics. Modern computerized adaptive testing (CAT) can overcome these obstacles by enabling precise assessment of fatigue without requiring the administration of a large number of questions. A working item bank is essential for development of a CAT platform. The present report describes the building of an operational item bank for use in clinical settings with the ultimate goal of improving CRF identification and treatment. STUDY DESIGN AND SETTING: The sample included 301 cancer patients. Psychometric properties of items were examined by using Rasch analysis, an Item Response Theory (IRT) model. RESULTS AND CONCLUSION: The final bank includes 72 items. These 72 unidimensional items explained 57.5\% of the variance, based on factor analysis results. Excellent internal consistency (alpha=0.99) and acceptable item-total correlation were found (range: 0.51-0.85). The 72 items covered a reasonable range of the fatigue continuum. No significant ceiling effects, floor effects, or gaps were found. A sample short form was created for demonstration purposes. The resulting bank is amenable to the development of a CAT platform.},
	keywords = {Adult, Aged, Aged, 80 and over, Factor Analysis, Statistical, Fatigue/*etiology/psychology, Female, Humans, Male, Middle Aged, Neoplasms/*complications/psychology, Psychometrics, Questionnaires},
	isbn = {0895-4356 (Print)0895-4356 (Linking)},
	author = {Lai, J-S. and Cella, D. and Dineen, K. and Bode, R. and Von Roenn, J. and Gershon, R. C. and Shevrin, D.}
}
