@article {185,
	title = {Simulated computerized adaptive tests for measuring functional status were efficient with good discriminant validity in patients with hip, knee, or foot/ankle impairments},
	journal = {Journal of Clinical Epidemiology},
	volume = {58},
	number = {6},
	year = {2005},
	note = {0895-4356 (Print)Journal ArticleMulticenter StudyValidation Studies},
	pages = {629-38},
	abstract = {BACKGROUND AND OBJECTIVE: To develop computerized adaptive tests (CATs) designed to assess lower extremity functional status (FS) in people with lower extremity impairments using items from the Lower Extremity Functional Scale and compare discriminant validity of FS measures generated using all items analyzed with a rating scale Item Response Theory model (theta(IRT)) and measures generated using the simulated CATs (theta(CAT)). METHODS: Secondary analysis of retrospective intake rehabilitation data. RESULTS: Unidimensionality of items was strong, and local independence of items was adequate. Differential item functioning (DIF) affected item calibration related to body part, that is, hip, knee, or foot/ankle, but DIF did not affect item calibration for symptom acuity, gender, age, or surgical history. Therefore, patients were separated into three body part specific groups. The rating scale model fit all three data sets well. Three body part specific CATs were developed: each was 70\% more efficient than using all LEFS items to estimate FS measures. theta(IRT) and theta(CAT) measures discriminated patients by symptom acuity, age, and surgical history in similar ways. theta(CAT) measures were as precise as theta(IRT) measures. CONCLUSION: Body part-specific simulated CATs were efficient and produced precise measures of FS with good discriminant validity.},
	keywords = {*Health Status Indicators, Activities of Daily Living, Adolescent, Adult, Aged, Aged, 80 and over, Ankle Joint/physiopathology, Diagnosis, Computer-Assisted/*methods, Female, Hip Joint/physiopathology, Humans, Joint Diseases/physiopathology/*rehabilitation, Knee Joint/physiopathology, Lower Extremity/*physiopathology, Male, Middle Aged, Research Support, N.I.H., Extramural, Research Support, U.S. Gov{\textquoteright}t, P.H.S., Retrospective Studies},
	author = {Hart, D. L. and Mioduski, J. E. and Stratford, P. W.}
}
@article {329,
	title = {Computerization and adaptive administration of the NEO PI-R},
	journal = {Assessment},
	volume = {7},
	number = {4},
	year = {2000},
	note = {1073-1911 (Print)Journal Article},
	pages = {347-64},
	abstract = {This study asks, how well does an item response theory (IRT) based computerized adaptive NEO PI-R work? To explore this question, real-data simulations (N = 1,059) were used to evaluate a maximum information item selection computerized adaptive test (CAT) algorithm. Findings indicated satisfactory recovery of full-scale facet scores with the administration of around four items per facet scale. Thus, the NEO PI-R could be reduced in half with little loss in precision by CAT administration. However, results also indicated that the CAT algorithm was not necessary. We found that for many scales, administering the "best" four items per facet scale would have produced similar results. In the conclusion, we discuss the future of computerized personality assessment and describe the role IRT methods might play in such assessments.},
	keywords = {*Personality Inventory, Algorithms, California, Diagnosis, Computer-Assisted/*methods, Humans, Models, Psychological, Psychometrics/methods, Reproducibility of Results},
	author = {Reise, S. P. and Henson, J. M.}
}
