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Download full textMislevy, Robert J.; Wu, Pao-Kuei – 1988
The basic equations of item response theory provide a foundation for inferring examinees' abilities and items' operating characteristics from observed responses. In practice, though, examinees will usually not have provided a response to every available item--for reasons that may or may not have been intended by the test administrator, and that…
Descriptors: Ability, Adaptive Testing, Equations (Mathematics), Estimation (Mathematics)
Bergstrom, Betty; And Others – 1994
Examinee response times from a computerized adaptive test taken by 204 examinees taking a certification examination were analyzed using a hierarchical linear model. Two equations were posed: a within-person model and a between-person model. Variance within persons was eight times greater than variance between persons. Several variables…
Descriptors: Adaptive Testing, Adults, Certification, Computer Assisted Testing
