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Psychometrics IRT CAT

Sireci, Stephen G.; Wainer, Howard; Braun, Henry I.
Publication Year:
Report Number:
ETS Research Report
Document Type:
Page Count:
Subject/Key Words:
Psychometrics, Validity, Reliability, Computer Assisted Testing, Item Response Theory (IRT), Performance Assessment, Criterion Referenced Tests, Measurement, Estimation (Mathematics), Generalization, Scaling, Test Construction, Norm Referenced Tests, Test Format, Test Interpretation


This essay on Psychometrics consists of these four sections: Psychological Measurement, Fundamental Measurement Concepts, Formal Measurement Models, and Interpreting Scores on Tests and Inventories. This essay discusses the following subjects: psychological scaling, measurement and measurement scales, purposes and uses of tests and inventories, item types and test formats, reliability, generalizability, validity, true score theory, estimating true score, a model for error, item response theory, estimating proficiency, estimating item parameters, notation and general principles, norm-reference and criterion-referenced approaches in test development, understanding and interpreting test scores, percentile and standard score bands, setting standards on norm- and criterion-referenced tests, computer-based testing, and performance assessment.

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