Descriptor
| Ability | 1 |
| Difficulty Level | 1 |
| Item Response Theory | 1 |
| Reliability | 1 |
| True Scores | 1 |
Author
| Dimitrov, Dimiter M. | 1 |
Publication Type
| Journal Articles | 1 |
| Reports - Descriptive | 1 |
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Peer reviewedDimitrov, Dimiter M. – Journal of Applied Measurement, 2003
Proposes formulas for expected true-score measures and reliability of binary items as a function of their Rasch difficulty when the trait (ability) distribution is normal or logistic. Provides an illustrative example for using the proposed formulas. (SLD)
Descriptors: Ability, Difficulty Level, Item Response Theory, Reliability
