Linking and Equating Terminology: Raw Score and Rasch | ||
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Term | Linn & Mislevy (Classical Test Theory) meaning | Rasch meaning |
Linking | general term for making the results of different tests comparable | enabling the data to be analyzed together in one analysis (if desired) to construct one overall set of measures |
Equating | correspondence of raw scores between tests | putting the measures in the same frame of reference |
Calibration | putting the scores in the same frame of reference | constructing item measures in the internal frame of reference |
Projection | scores on one test weakly predict scores on another test | (a height-weight situation) |
Moderation | equivalences based on matching up sample statistics | (Fahrenheit-Celsius equating) |
Anchoring (fixing) | - | measures obtained from one analysis (or construct theory) imposed on another to place it in the same frame of reference. |
Local origin | zero score or sample mean | reference location from which to measure along the latent variable |
Linn, R. L. (1993). Linking results of distinct assessments. Applied Measurement in Education, 6, 83-102. Mislevy, R. J. (1992). Linking educational assessments: Concepts, issues, and prospects. Princeton, NJ: Educational Testing Service. |
Linking Terminology: Raw Score and Rasch, Rasch Measurement Transactions, 2007, 20:4 p. 1076
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