Reliability of Scaled Scores IRT
- Author(s):
-
Haberman, Shelby J.
- Publication Year:
- 2008
- Report Number:
-
RR-08-70
- Source:
-
ETS Research Report
- Document Type:
- Report
- Page Count:
- 9
- Subject/Key Words:
-
Item Response Theory (IRT),
Variance,
Item Sets,
Partial Credit Model,
Two-Parameter Logistic Model,
Reliability
Abstract
The reliability of a scaled score can be computed by use of item response theory. Estimated reliability can be obtained even if the item response model selected is not valid.
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