Multiple Test Equating Using the Rasch Model

Multiple Test Equating Using the Rasch Model

Procedures are presented for equating simultaneously several tests which have been calibrated by the Rasch Model. Three multiple test equating designs are described. A Full Matrix Design equates each test to all others. A Chain Design links tests sequentially. A Vector Design equates one test to eac...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Brigman, S. Leellen, Bashaw, W. L
Format: Report
Sprache:eng
Schlagworte:
Ability
Achievement Tests
Computer Programs
Equated Scores
Error of Measurement
Item Analysis
Mathematical Models
Matrices
Measurement Techniques
Probability
Rasch Model
Statistical Analysis
Test Equating
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Beschreibung
Zusammenfassung:Procedures are presented for equating simultaneously several tests which have been calibrated by the Rasch Model. Three multiple test equating designs are described. A Full Matrix Design equates each test to all others. A Chain Design links tests sequentially. A Vector Design equates one test to each of the other tests. For each design, the Rasch model test equating constants were obtained for four reading vocabulary tests. The standard errors of the constants based on each design are also provided and the appropriate use of each design is discussed. (Author/DEP)